/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/bitvector-loops/overflow_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:39:56,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:39:56,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:39:56,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:39:56,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:39:56,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:39:56,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:39:56,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:39:56,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:39:56,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:39:56,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:39:56,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:39:56,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:39:56,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:39:56,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:39:56,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:39:56,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:39:56,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:39:56,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:39:56,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:39:56,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:39:56,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:39:56,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:39:56,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:39:56,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:39:56,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:39:56,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:39:56,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:39:56,934 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 01:39:56,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:39:56,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:39:56,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:39:56,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:39:56,986 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:39:56,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:39:56,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:39:56,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:39:56,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:39:57,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:39:57,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:39:57,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:39:57,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:39:57,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:39:57,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:39:57,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:39:57,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:39:57,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:39:57,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:39:57,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:39:57,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:39:57,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:39:57,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:39:57,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:39:57,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:39:57,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:39:57,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:39:57,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:39:57,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:39:57,454 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:39:57,455 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:39:57,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2020-12-23 01:39:57,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ae6320c8/6402beffdb954126a024d82bfd20f9a2/FLAG977ce753c [2020-12-23 01:39:58,098 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:39:58,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2020-12-23 01:39:58,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ae6320c8/6402beffdb954126a024d82bfd20f9a2/FLAG977ce753c [2020-12-23 01:39:58,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4ae6320c8/6402beffdb954126a024d82bfd20f9a2 [2020-12-23 01:39:58,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:39:58,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:39:58,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:39:58,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:39:58,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:39:58,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7737fa43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58, skipping insertion in model container [2020-12-23 01:39:58,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:39:58,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:39:58,659 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/bitvector-loops/overflow_1-2.c[324,337] [2020-12-23 01:39:58,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:39:58,679 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:39:58,694 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/bitvector-loops/overflow_1-2.c[324,337] [2020-12-23 01:39:58,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:39:58,713 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:39:58,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58 WrapperNode [2020-12-23 01:39:58,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:39:58,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:39:58,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:39:58,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:39:58,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:39:58,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:39:58,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:39:58,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:39:58,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (1/1) ... [2020-12-23 01:39:58,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:39:58,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:39:58,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:39:58,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:39:58,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (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 01:39:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:39:58,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:39:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:39:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:39:59,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:39:59,233 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 01:39:59,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:39:59 BoogieIcfgContainer [2020-12-23 01:39:59,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:39:59,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:39:59,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:39:59,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:39:59,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:39:58" (1/3) ... [2020-12-23 01:39:59,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a716221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:39:59, skipping insertion in model container [2020-12-23 01:39:59,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:58" (2/3) ... [2020-12-23 01:39:59,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a716221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:39:59, skipping insertion in model container [2020-12-23 01:39:59,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:39:59" (3/3) ... [2020-12-23 01:39:59,249 INFO L111 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2020-12-23 01:39:59,256 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:39:59,261 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:39:59,285 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:39:59,329 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:39:59,330 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:39:59,330 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:39:59,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:39:59,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:39:59,331 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:39:59,331 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:39:59,331 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:39:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-23 01:39:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 01:39:59,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:59,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 01:39:59,357 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 01:39:59,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:59,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744703589] [2020-12-23 01:39:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:59,819 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 01:39:59,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744703589] [2020-12-23 01:39:59,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:39:59,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:39:59,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008608505] [2020-12-23 01:39:59,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:39:59,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:59,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:39:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:39:59,846 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-23 01:39:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:59,878 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 01:39:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:39:59,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 01:39:59,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:59,890 INFO L225 Difference]: With dead ends: 18 [2020-12-23 01:39:59,890 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 01:39:59,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:39:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 01:39:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 01:39:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 01:39:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 01:39:59,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 01:39:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:59,927 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 01:39:59,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:39:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 01:39:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 01:39:59,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:59,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:39:59,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:39:59,928 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 01:39:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:59,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727053726] [2020-12-23 01:39:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:00,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727053726] [2020-12-23 01:40:00,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746154112] [2020-12-23 01:40:00,007 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 01:40:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:00,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:40:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:00,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:00,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:40:00,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203657654] [2020-12-23 01:40:00,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:40:00,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:40:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:40:00,152 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-23 01:40:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:00,171 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-12-23 01:40:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:40:00,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 01:40:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:00,172 INFO L225 Difference]: With dead ends: 14 [2020-12-23 01:40:00,172 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 01:40:00,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:40:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 01:40:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 01:40:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 01:40:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 01:40:00,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-23 01:40:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:00,177 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 01:40:00,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:40:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 01:40:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 01:40:00,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:00,178 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:00,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 01:40:00,392 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2020-12-23 01:40:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:00,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032906354] [2020-12-23 01:40:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:00,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032906354] [2020-12-23 01:40:00,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868380584] [2020-12-23 01:40:00,512 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 01:40:00,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:40:00,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:40:00,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:00,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:00,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:40:00,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634964185] [2020-12-23 01:40:00,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:40:00,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:00,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:40:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:40:00,673 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-23 01:40:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:00,710 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-23 01:40:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:40:00,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 01:40:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:00,712 INFO L225 Difference]: With dead ends: 16 [2020-12-23 01:40:00,712 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 01:40:00,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:40:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 01:40:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 01:40:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 01:40:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-23 01:40:00,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-12-23 01:40:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:00,717 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-23 01:40:00,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:40:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-23 01:40:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:40:00,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:00,718 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:00,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:00,933 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:00,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 3 times [2020-12-23 01:40:00,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:00,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571461948] [2020-12-23 01:40:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:01,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571461948] [2020-12-23 01:40:01,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658135245] [2020-12-23 01:40:01,114 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 01:40:01,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:40:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:40:01,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:01,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:01,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:40:01,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997953647] [2020-12-23 01:40:01,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:40:01,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:01,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:40:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:40:01,327 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-23 01:40:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:01,397 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-12-23 01:40:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:40:01,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 01:40:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:01,400 INFO L225 Difference]: With dead ends: 18 [2020-12-23 01:40:01,401 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 01:40:01,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:40:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 01:40:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 01:40:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 01:40:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 01:40:01,412 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-12-23 01:40:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:01,413 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 01:40:01,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:40:01,414 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 01:40:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:40:01,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:01,414 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:01,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:01,628 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 4 times [2020-12-23 01:40:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:01,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365486264] [2020-12-23 01:40:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:01,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365486264] [2020-12-23 01:40:01,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916815527] [2020-12-23 01:40:01,849 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 01:40:01,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:40:01,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:01,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:40:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:02,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:02,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:40:02,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531169967] [2020-12-23 01:40:02,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:40:02,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:02,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:40:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:40:02,005 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-23 01:40:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:02,086 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-23 01:40:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:40:02,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 01:40:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:02,088 INFO L225 Difference]: With dead ends: 20 [2020-12-23 01:40:02,088 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 01:40:02,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:40:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 01:40:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 01:40:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 01:40:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 01:40:02,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-12-23 01:40:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:02,094 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 01:40:02,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:40:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 01:40:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 01:40:02,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:02,095 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:02,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:02,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 5 times [2020-12-23 01:40:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:02,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954740955] [2020-12-23 01:40:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:02,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954740955] [2020-12-23 01:40:02,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832337412] [2020-12-23 01:40:02,497 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 01:40:02,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:40:02,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:40:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:02,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:02,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:40:02,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459230700] [2020-12-23 01:40:02,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:40:02,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:02,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:40:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:40:02,808 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2020-12-23 01:40:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:02,901 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 01:40:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:40:02,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-23 01:40:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:02,903 INFO L225 Difference]: With dead ends: 22 [2020-12-23 01:40:02,903 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 01:40:02,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:40:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 01:40:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 01:40:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:40:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 01:40:02,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-12-23 01:40:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:02,908 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 01:40:02,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:40:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 01:40:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:40:02,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:02,910 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:03,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 01:40:03,113 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:03,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 6 times [2020-12-23 01:40:03,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:03,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508143167] [2020-12-23 01:40:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:03,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508143167] [2020-12-23 01:40:03,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534880112] [2020-12-23 01:40:03,351 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 01:40:03,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:40:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:40:03,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:03,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:03,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:40:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429894756] [2020-12-23 01:40:03,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:40:03,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:03,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:40:03,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:40:03,536 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-23 01:40:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:03,654 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 01:40:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:40:03,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-23 01:40:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:03,655 INFO L225 Difference]: With dead ends: 24 [2020-12-23 01:40:03,655 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 01:40:03,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:40:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 01:40:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 01:40:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 01:40:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 01:40:03,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-12-23 01:40:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:03,661 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 01:40:03,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:40:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 01:40:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:40:03,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:03,662 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:03,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:03,866 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:03,867 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 7 times [2020-12-23 01:40:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:03,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356060091] [2020-12-23 01:40:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:04,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356060091] [2020-12-23 01:40:04,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435046480] [2020-12-23 01:40:04,181 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 01:40:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 01:40:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:04,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:04,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:40:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705716763] [2020-12-23 01:40:04,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:40:04,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:40:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:40:04,416 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-23 01:40:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:04,567 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-12-23 01:40:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:40:04,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-23 01:40:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:04,568 INFO L225 Difference]: With dead ends: 26 [2020-12-23 01:40:04,568 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 01:40:04,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:40:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 01:40:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 01:40:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 01:40:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 01:40:04,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-12-23 01:40:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:04,575 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 01:40:04,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:40:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 01:40:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:40:04,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:04,576 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:04,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:04,792 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 8 times [2020-12-23 01:40:04,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:04,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426269875] [2020-12-23 01:40:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:05,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426269875] [2020-12-23 01:40:05,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927861452] [2020-12-23 01:40:05,120 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 01:40:05,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:40:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:05,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 01:40:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:05,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:05,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:40:05,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115891443] [2020-12-23 01:40:05,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:40:05,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:05,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:40:05,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:40:05,313 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-23 01:40:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:05,521 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 01:40:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:40:05,521 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-23 01:40:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:05,522 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:40:05,522 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 01:40:05,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:40:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 01:40:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 01:40:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 01:40:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 01:40:05,528 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-12-23 01:40:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:05,529 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 01:40:05,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:40:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 01:40:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:40:05,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:05,530 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:05,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 01:40:05,745 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:05,746 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 9 times [2020-12-23 01:40:05,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:05,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999698190] [2020-12-23 01:40:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:06,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999698190] [2020-12-23 01:40:06,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136404130] [2020-12-23 01:40:06,082 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 01:40:06,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 01:40:06,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:06,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 01:40:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:06,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:06,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 01:40:06,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484398235] [2020-12-23 01:40:06,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:40:06,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:40:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:40:06,759 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2020-12-23 01:40:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:07,009 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-23 01:40:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:40:07,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-23 01:40:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:07,010 INFO L225 Difference]: With dead ends: 30 [2020-12-23 01:40:07,010 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 01:40:07,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:40:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 01:40:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 01:40:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 01:40:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-23 01:40:07,017 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-12-23 01:40:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:07,017 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-23 01:40:07,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:40:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-23 01:40:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:40:07,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:07,018 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:07,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:07,225 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 10 times [2020-12-23 01:40:07,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:07,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84939385] [2020-12-23 01:40:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:07,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84939385] [2020-12-23 01:40:07,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210087940] [2020-12-23 01:40:07,695 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 01:40:07,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:40:07,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:07,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 01:40:07,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:08,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:08,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 01:40:08,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084347710] [2020-12-23 01:40:08,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 01:40:08,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 01:40:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:40:08,032 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-23 01:40:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:08,317 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-23 01:40:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:40:08,318 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-23 01:40:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:08,321 INFO L225 Difference]: With dead ends: 32 [2020-12-23 01:40:08,322 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 01:40:08,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:40:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 01:40:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 01:40:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 01:40:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-23 01:40:08,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-12-23 01:40:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:08,339 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-23 01:40:08,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 01:40:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-23 01:40:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:40:08,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:08,340 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:08,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:08,554 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:08,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 11 times [2020-12-23 01:40:08,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:08,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677365394] [2020-12-23 01:40:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:09,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677365394] [2020-12-23 01:40:09,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749375303] [2020-12-23 01:40:09,015 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 01:40:10,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:40:10,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:10,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 01:40:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:11,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:11,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 01:40:11,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959446078] [2020-12-23 01:40:11,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:40:11,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:40:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:40:11,188 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-23 01:40:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:11,555 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 01:40:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 01:40:11,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-23 01:40:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:11,557 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:40:11,558 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 01:40:11,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 21 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:40:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 01:40:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 01:40:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 01:40:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-23 01:40:11,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-12-23 01:40:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:11,564 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-23 01:40:11,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:40:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-23 01:40:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:40:11,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:11,565 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:11,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 01:40:11,769 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 12 times [2020-12-23 01:40:11,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:11,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739273929] [2020-12-23 01:40:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:12,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739273929] [2020-12-23 01:40:12,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004861394] [2020-12-23 01:40:12,359 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 01:40:13,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:40:13,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 01:40:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:13,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:13,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 01:40:13,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962735436] [2020-12-23 01:40:13,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:40:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:40:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:40:13,290 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-23 01:40:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:13,727 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 01:40:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:40:13,730 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-23 01:40:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:13,732 INFO L225 Difference]: With dead ends: 36 [2020-12-23 01:40:13,732 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 01:40:13,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:40:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 01:40:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 01:40:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 01:40:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-23 01:40:13,738 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-12-23 01:40:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:13,738 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-23 01:40:13,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:40:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-23 01:40:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 01:40:13,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:13,739 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:13,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 01:40:13,943 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 13 times [2020-12-23 01:40:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:13,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487188721] [2020-12-23 01:40:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487188721] [2020-12-23 01:40:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422016073] [2020-12-23 01:40:14,613 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 01:40:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:14,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 01:40:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:15,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:15,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 01:40:15,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802405365] [2020-12-23 01:40:15,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 01:40:15,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:15,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 01:40:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:40:15,170 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-23 01:40:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:15,709 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-23 01:40:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 01:40:15,709 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-23 01:40:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:15,710 INFO L225 Difference]: With dead ends: 38 [2020-12-23 01:40:15,710 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 01:40:15,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-12-23 01:40:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 01:40:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 01:40:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 01:40:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-23 01:40:15,723 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-12-23 01:40:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:15,723 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-23 01:40:15,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 01:40:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-23 01:40:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:40:15,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:15,729 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:15,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:40:15,943 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:15,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 14 times [2020-12-23 01:40:15,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:15,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918113869] [2020-12-23 01:40:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:16,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918113869] [2020-12-23 01:40:16,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575220296] [2020-12-23 01:40:16,726 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 01:40:16,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:40:16,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:16,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 01:40:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:17,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:17,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 01:40:17,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216365523] [2020-12-23 01:40:17,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 01:40:17,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 01:40:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:40:17,347 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-23 01:40:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:18,000 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 01:40:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 01:40:18,005 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-23 01:40:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:18,007 INFO L225 Difference]: With dead ends: 40 [2020-12-23 01:40:18,007 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 01:40:18,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-12-23 01:40:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 01:40:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 01:40:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 01:40:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-23 01:40:18,019 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-12-23 01:40:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:18,022 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-23 01:40:18,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 01:40:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-23 01:40:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:40:18,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:18,023 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:18,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:18,227 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 15 times [2020-12-23 01:40:18,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:18,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831572576] [2020-12-23 01:40:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:19,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831572576] [2020-12-23 01:40:19,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141210169] [2020-12-23 01:40:19,025 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 01:40:20,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 01:40:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:20,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 01:40:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:20,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:20,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 01:40:20,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124600297] [2020-12-23 01:40:20,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 01:40:20,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:20,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 01:40:20,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 01:40:20,924 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-23 01:40:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:21,620 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 01:40:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 01:40:21,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-23 01:40:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:21,621 INFO L225 Difference]: With dead ends: 42 [2020-12-23 01:40:21,621 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 01:40:21,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 01:40:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 01:40:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 01:40:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 01:40:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 01:40:21,639 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-12-23 01:40:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:21,641 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 01:40:21,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 01:40:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 01:40:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 01:40:21,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:21,642 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:21,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:40:21,847 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:21,848 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 16 times [2020-12-23 01:40:21,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:21,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832928707] [2020-12-23 01:40:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:22,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832928707] [2020-12-23 01:40:22,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506512292] [2020-12-23 01:40:22,892 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 01:40:22,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:40:22,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:22,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 01:40:22,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:23,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:23,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 01:40:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497952009] [2020-12-23 01:40:23,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 01:40:23,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 01:40:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 01:40:23,416 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-23 01:40:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:24,185 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-12-23 01:40:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 01:40:24,186 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-23 01:40:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:24,187 INFO L225 Difference]: With dead ends: 44 [2020-12-23 01:40:24,187 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 01:40:24,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 01:40:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 01:40:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 01:40:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 01:40:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 01:40:24,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-12-23 01:40:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:24,194 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 01:40:24,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 01:40:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 01:40:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 01:40:24,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:24,195 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:24,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:40:24,398 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 17 times [2020-12-23 01:40:24,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:24,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418080287] [2020-12-23 01:40:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:25,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418080287] [2020-12-23 01:40:25,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948119321] [2020-12-23 01:40:25,514 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 01:40:41,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 01:40:41,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:41,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-23 01:40:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:42,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:42,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 01:40:42,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408791346] [2020-12-23 01:40:42,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 01:40:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 01:40:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:40:42,750 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2020-12-23 01:40:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:43,618 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 01:40:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 01:40:43,618 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-23 01:40:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:43,619 INFO L225 Difference]: With dead ends: 46 [2020-12-23 01:40:43,619 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 01:40:43,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 32 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 01:40:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 01:40:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 01:40:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 01:40:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-23 01:40:43,625 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-12-23 01:40:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:43,626 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-23 01:40:43,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 01:40:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-23 01:40:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 01:40:43,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:43,626 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:43,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:40:43,827 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 18 times [2020-12-23 01:40:43,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:43,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264693351] [2020-12-23 01:40:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:45,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264693351] [2020-12-23 01:40:45,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119370671] [2020-12-23 01:40:45,030 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 01:40:47,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 01:40:47,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:47,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 01:40:47,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:47,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:47,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 01:40:47,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60208067] [2020-12-23 01:40:47,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 01:40:47,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:47,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 01:40:47,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:40:47,446 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-23 01:40:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:48,369 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-23 01:40:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 01:40:48,370 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-23 01:40:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:48,371 INFO L225 Difference]: With dead ends: 48 [2020-12-23 01:40:48,371 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 01:40:48,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 01:40:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 01:40:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 01:40:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 01:40:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-23 01:40:48,376 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-12-23 01:40:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:48,377 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-23 01:40:48,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 01:40:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-23 01:40:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:40:48,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:48,377 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:48,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:48,578 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 19 times [2020-12-23 01:40:48,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:48,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546275680] [2020-12-23 01:40:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:49,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546275680] [2020-12-23 01:40:49,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281532304] [2020-12-23 01:40:49,864 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 01:40:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:49,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-23 01:40:49,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:50,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:50,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 01:40:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313259967] [2020-12-23 01:40:50,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 01:40:50,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 01:40:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 01:40:50,742 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-23 01:40:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:51,843 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-12-23 01:40:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 01:40:51,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-23 01:40:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:51,845 INFO L225 Difference]: With dead ends: 50 [2020-12-23 01:40:51,845 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 01:40:51,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 01:40:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 01:40:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 01:40:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 01:40:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-23 01:40:51,853 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-12-23 01:40:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:51,854 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-23 01:40:51,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 01:40:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-23 01:40:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:40:51,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:51,854 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:52,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:52,059 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 20 times [2020-12-23 01:40:52,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:52,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469798072] [2020-12-23 01:40:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:53,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469798072] [2020-12-23 01:40:53,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641483470] [2020-12-23 01:40:53,478 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 01:40:53,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:40:53,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:53,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-23 01:40:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:54,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:54,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 01:40:54,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894530661] [2020-12-23 01:40:54,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 01:40:54,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:54,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 01:40:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 01:40:54,464 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2020-12-23 01:40:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:55,707 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 01:40:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 01:40:55,708 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-23 01:40:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:55,709 INFO L225 Difference]: With dead ends: 52 [2020-12-23 01:40:55,709 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 01:40:55,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 01:40:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 01:40:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 01:40:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 01:40:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-23 01:40:55,715 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-12-23 01:40:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:55,715 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-23 01:40:55,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 01:40:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-23 01:40:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 01:40:55,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:55,716 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-23 01:40:55,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:40:55,925 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 21 times [2020-12-23 01:40:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:55,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441817834] [2020-12-23 01:40:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441817834] [2020-12-23 01:40:57,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879976882] [2020-12-23 01:40:57,558 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 01:41:00,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 01:41:00,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:41:00,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 110 conjunts are in the unsatisfiable core [2020-12-23 01:41:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:41:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:41:01,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:41:01,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 01:41:01,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236135640] [2020-12-23 01:41:01,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 01:41:01,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:41:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 01:41:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 01:41:01,889 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2020-12-23 01:41:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:41:03,231 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-23 01:41:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 01:41:03,232 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-23 01:41:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:41:03,233 INFO L225 Difference]: With dead ends: 54 [2020-12-23 01:41:03,233 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 01:41:03,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 01:41:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 01:41:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 01:41:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:41:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-23 01:41:03,238 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-12-23 01:41:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:41:03,238 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-23 01:41:03,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 01:41:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-23 01:41:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:41:03,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:41:03,239 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2020-12-23 01:41:03,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 01:41:03,443 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:41:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:41:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 22 times [2020-12-23 01:41:03,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:41:03,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492324726] [2020-12-23 01:41:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:41:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:41:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:41:05,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492324726] [2020-12-23 01:41:05,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247066470] [2020-12-23 01:41:05,067 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 01:41:05,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:41:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:41:05,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 112 conjunts are in the unsatisfiable core [2020-12-23 01:41:05,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:41:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:41:06,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:41:06,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 01:41:06,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592134560] [2020-12-23 01:41:06,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 01:41:06,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:41:06,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 01:41:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 01:41:06,422 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2020-12-23 01:41:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:41:07,901 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-12-23 01:41:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 01:41:07,902 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-23 01:41:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:41:07,903 INFO L225 Difference]: With dead ends: 56 [2020-12-23 01:41:07,903 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 01:41:07,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 23 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 01:41:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 01:41:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 01:41:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 01:41:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-23 01:41:07,909 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-12-23 01:41:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:41:07,910 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-23 01:41:07,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 01:41:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-23 01:41:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:41:07,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:41:07,911 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2020-12-23 01:41:08,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:41:08,124 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:41:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:41:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1231819568, now seen corresponding path program 23 times [2020-12-23 01:41:08,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:41:08,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785860147] [2020-12-23 01:41:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:41:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:41:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:41:09,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785860147] [2020-12-23 01:41:09,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71592058] [2020-12-23 01:41:09,909 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 01:43:43,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 01:43:43,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:43:43,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 136 conjunts are in the unsatisfiable core [2020-12-23 01:43:43,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:43:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:43:46,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:43:46,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 01:43:46,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836581726] [2020-12-23 01:43:46,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 01:43:46,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:43:46,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 01:43:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:43:46,221 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2020-12-23 01:43:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:43:47,831 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 01:43:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 01:43:47,832 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2020-12-23 01:43:47,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:43:47,833 INFO L225 Difference]: With dead ends: 58 [2020-12-23 01:43:47,833 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:43:47,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 44 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 01:43:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:43:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 01:43:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 01:43:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-23 01:43:47,839 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-12-23 01:43:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:43:47,839 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-23 01:43:47,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 01:43:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-23 01:43:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 01:43:47,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:43:47,840 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1] [2020-12-23 01:43:48,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 01:43:48,046 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:43:48,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:43:48,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1685660720, now seen corresponding path program 24 times [2020-12-23 01:43:48,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:43:48,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026499336] [2020-12-23 01:43:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:43:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:43:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:43:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026499336] [2020-12-23 01:43:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544604106] [2020-12-23 01:43:50,102 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 01:44:11,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 01:44:11,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:44:11,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 128 conjunts are in the unsatisfiable core [2020-12-23 01:44:11,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:44:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:44:13,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:44:13,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 01:44:13,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169371873] [2020-12-23 01:44:13,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 01:44:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:44:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 01:44:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 01:44:13,504 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 51 states. [2020-12-23 01:44:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:44:15,330 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-12-23 01:44:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 01:44:15,331 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 53 [2020-12-23 01:44:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:44:15,332 INFO L225 Difference]: With dead ends: 60 [2020-12-23 01:44:15,332 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 01:44:15,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 01:44:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 01:44:15,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 01:44:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 01:44:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-23 01:44:15,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-12-23 01:44:15,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:44:15,340 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-23 01:44:15,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 01:44:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-23 01:44:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 01:44:15,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:44:15,341 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1] [2020-12-23 01:44:15,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:44:15,547 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:44:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:44:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 770573200, now seen corresponding path program 25 times [2020-12-23 01:44:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:44:15,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135589230] [2020-12-23 01:44:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:44:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:44:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:44:17,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135589230] [2020-12-23 01:44:17,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728426341] [2020-12-23 01:44:17,793 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 01:44:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:44:17,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-23 01:44:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:44:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:44:19,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:44:19,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 01:44:19,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055758021] [2020-12-23 01:44:19,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 01:44:19,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:44:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 01:44:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 01:44:19,618 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 53 states. [2020-12-23 01:44:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:44:21,602 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-23 01:44:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 01:44:21,603 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2020-12-23 01:44:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:44:21,604 INFO L225 Difference]: With dead ends: 62 [2020-12-23 01:44:21,604 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 01:44:21,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 30 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 01:44:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 01:44:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 01:44:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 01:44:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-12-23 01:44:21,611 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-12-23 01:44:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:44:21,611 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-12-23 01:44:21,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 01:44:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-12-23 01:44:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 01:44:21,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:44:21,612 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1] [2020-12-23 01:44:21,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 01:44:21,818 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:44:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:44:21,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1839762160, now seen corresponding path program 26 times [2020-12-23 01:44:21,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:44:21,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150120087] [2020-12-23 01:44:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:44:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:44:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:44:24,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150120087] [2020-12-23 01:44:24,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777724138] [2020-12-23 01:44:24,338 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 01:44:24,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:44:24,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:44:24,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 136 conjunts are in the unsatisfiable core [2020-12-23 01:44:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:44:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:44:26,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:44:26,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 01:44:26,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833471804] [2020-12-23 01:44:26,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 01:44:26,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:44:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 01:44:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:44:26,434 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 55 states. [2020-12-23 01:44:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:44:28,617 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 01:44:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 01:44:28,623 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 57 [2020-12-23 01:44:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:44:28,623 INFO L225 Difference]: With dead ends: 64 [2020-12-23 01:44:28,624 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 01:44:28,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 27 SyntacticMatches, 31 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 01:44:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 01:44:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 01:44:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 01:44:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-12-23 01:44:28,630 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-12-23 01:44:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:44:28,630 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-12-23 01:44:28,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 01:44:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-12-23 01:44:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 01:44:28,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:44:28,631 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1] [2020-12-23 01:44:28,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 01:44:28,843 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:44:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:44:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1461798320, now seen corresponding path program 27 times [2020-12-23 01:44:28,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:44:28,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649721114] [2020-12-23 01:44:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:44:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat