/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/in-de32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:03:14,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:03:14,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:03:15,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 07:03:15,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:03:15,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:03:15,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:03:15,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:03:15,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:03:15,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:03:15,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:03:15,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:03:15,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:03:15,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:03:15,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:03:15,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:03:15,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:03:15,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:03:15,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:03:15,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:03:15,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:03:15,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:03:15,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:03:15,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:03:15,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:03:15,157 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:03:15,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:03:15,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:03:15,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:03:15,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:03:15,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:03:15,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:03:15,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:03:15,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:03:15,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:03:15,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:03:15,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:03:15,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:03:15,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:03:15,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:03:15,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:03:15,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:03:15,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:03:15,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:03:15,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:03:15,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:03:15,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:03:15,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:03:15,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:03:15,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:03:15,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:03:15,680 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:03:15,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2020-12-23 07:03:15,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b109e3e3/f85da77da8a34cdd8adaf5982454bdb8/FLAG65c35feb1 [2020-12-23 07:03:16,422 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:03:16,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de32.c [2020-12-23 07:03:16,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b109e3e3/f85da77da8a34cdd8adaf5982454bdb8/FLAG65c35feb1 [2020-12-23 07:03:16,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b109e3e3/f85da77da8a34cdd8adaf5982454bdb8 [2020-12-23 07:03:16,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:03:16,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:03:16,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:03:16,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:03:16,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:03:16,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:03:16" (1/1) ... [2020-12-23 07:03:16,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6334093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:16, skipping insertion in model container [2020-12-23 07:03:16,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:03:16" (1/1) ... [2020-12-23 07:03:16,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:03:16,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:03:16,937 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2020-12-23 07:03:16,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:03:16,970 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:03:16,981 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2020-12-23 07:03:16,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:03:17,005 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:03:17,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17 WrapperNode [2020-12-23 07:03:17,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:03:17,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:03:17,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:03:17,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:03:17,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:03:17,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:03:17,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:03:17,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:03:17,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... [2020-12-23 07:03:17,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:03:17,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:03:17,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:03:17,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:03:17,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:03:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:03:17,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:03:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:03:17,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:03:17,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:03:17,478 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 07:03:17,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:03:17 BoogieIcfgContainer [2020-12-23 07:03:17,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:03:17,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:03:17,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:03:17,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:03:17,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:03:16" (1/3) ... [2020-12-23 07:03:17,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b21dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:03:17, skipping insertion in model container [2020-12-23 07:03:17,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:03:17" (2/3) ... [2020-12-23 07:03:17,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b21dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:03:17, skipping insertion in model container [2020-12-23 07:03:17,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:03:17" (3/3) ... [2020-12-23 07:03:17,494 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de32.c [2020-12-23 07:03:17,506 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:03:17,517 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:03:17,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:03:17,610 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:03:17,610 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:03:17,610 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:03:17,610 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:03:17,610 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:03:17,611 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:03:17,611 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:03:17,611 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:03:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-23 07:03:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:03:17,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:17,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:17,630 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1157484939, now seen corresponding path program 1 times [2020-12-23 07:03:17,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:17,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342597925] [2020-12-23 07:03:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342597925] [2020-12-23 07:03:17,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:03:17,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:03:17,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274204304] [2020-12-23 07:03:17,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:03:17,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:03:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:03:17,889 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-12-23 07:03:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:17,951 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2020-12-23 07:03:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:03:17,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 07:03:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:17,963 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:03:17,963 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:03:17,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:03:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:03:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:03:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:03:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2020-12-23 07:03:18,002 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2020-12-23 07:03:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:18,002 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-12-23 07:03:18,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:03:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2020-12-23 07:03:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:03:18,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:18,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:18,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:03:18,004 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:18,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1520629346, now seen corresponding path program 1 times [2020-12-23 07:03:18,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:18,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002573923] [2020-12-23 07:03:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:18,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002573923] [2020-12-23 07:03:18,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:03:18,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:03:18,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5596543] [2020-12-23 07:03:18,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:03:18,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:03:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:03:18,100 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 3 states. [2020-12-23 07:03:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:18,119 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-12-23 07:03:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:03:18,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 07:03:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:18,121 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:03:18,121 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:03:18,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:03:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:03:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-23 07:03:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:03:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2020-12-23 07:03:18,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2020-12-23 07:03:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:18,130 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2020-12-23 07:03:18,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:03:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2020-12-23 07:03:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:03:18,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:18,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:18,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:03:18,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1475376817, now seen corresponding path program 1 times [2020-12-23 07:03:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:18,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510563874] [2020-12-23 07:03:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:18,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510563874] [2020-12-23 07:03:18,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:03:18,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:03:18,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552791025] [2020-12-23 07:03:18,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:03:18,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:03:18,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:03:18,196 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 4 states. [2020-12-23 07:03:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:18,240 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-12-23 07:03:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:03:18,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 07:03:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:18,244 INFO L225 Difference]: With dead ends: 21 [2020-12-23 07:03:18,244 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 07:03:18,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:03:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 07:03:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 07:03:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 07:03:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-23 07:03:18,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2020-12-23 07:03:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:18,252 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-23 07:03:18,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:03:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-23 07:03:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:03:18,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:18,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:18,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:03:18,257 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:18,258 INFO L82 PathProgramCache]: Analyzing trace with hash 925156739, now seen corresponding path program 1 times [2020-12-23 07:03:18,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:18,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009728341] [2020-12-23 07:03:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009728341] [2020-12-23 07:03:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897062482] [2020-12-23 07:03:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:03:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:18,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:18,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:03:18,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509461074] [2020-12-23 07:03:18,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:03:18,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:18,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:03:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:03:18,545 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 6 states. [2020-12-23 07:03:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:18,623 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-12-23 07:03:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:03:18,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 07:03:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:18,625 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:03:18,625 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:03:18,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:03:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:03:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-12-23 07:03:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:03:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-23 07:03:18,641 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2020-12-23 07:03:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:18,641 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-23 07:03:18,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:03:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-23 07:03:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:03:18,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:18,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:18,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:18,862 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 19581631, now seen corresponding path program 1 times [2020-12-23 07:03:18,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:18,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033280822] [2020-12-23 07:03:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:18,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033280822] [2020-12-23 07:03:18,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081123292] [2020-12-23 07:03:18,982 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:03:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:19,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:03:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:19,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:19,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:03:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825983369] [2020-12-23 07:03:19,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:03:19,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:03:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:03:19,114 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 6 states. [2020-12-23 07:03:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:19,169 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 07:03:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:03:19,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 07:03:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:19,172 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:03:19,172 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:03:19,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:03:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:03:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-23 07:03:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:03:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-12-23 07:03:19,181 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2020-12-23 07:03:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:19,181 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-12-23 07:03:19,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:03:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-12-23 07:03:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:03:19,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:19,182 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:19,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:19,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash -564885954, now seen corresponding path program 2 times [2020-12-23 07:03:19,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906950081] [2020-12-23 07:03:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906950081] [2020-12-23 07:03:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779309267] [2020-12-23 07:03:19,527 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:19,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:19,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:03:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:19,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:19,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:03:19,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965061161] [2020-12-23 07:03:19,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:03:19,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:19,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:03:19,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:03:19,672 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 7 states. [2020-12-23 07:03:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:19,760 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-12-23 07:03:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:03:19,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 07:03:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:19,763 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:03:19,764 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 07:03:19,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:03:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 07:03:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-12-23 07:03:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:03:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-23 07:03:19,781 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 12 [2020-12-23 07:03:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:19,782 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-23 07:03:19,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:03:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-23 07:03:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:03:19,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:19,783 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:19,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:19,999 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:20,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2011524355, now seen corresponding path program 2 times [2020-12-23 07:03:20,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:20,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891864840] [2020-12-23 07:03:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891864840] [2020-12-23 07:03:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114368283] [2020-12-23 07:03:20,095 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:20,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:20,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:03:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:20,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:20,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 07:03:20,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451755525] [2020-12-23 07:03:20,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:03:20,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:20,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:03:20,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:03:20,192 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 8 states. [2020-12-23 07:03:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:20,227 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-12-23 07:03:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:03:20,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 07:03:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:20,228 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:03:20,228 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:03:20,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:03:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:03:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:03:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:03:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-23 07:03:20,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2020-12-23 07:03:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:20,234 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-23 07:03:20,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:03:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-23 07:03:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:03:20,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:20,235 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:20,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:20,451 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:20,452 INFO L82 PathProgramCache]: Analyzing trace with hash 488430819, now seen corresponding path program 3 times [2020-12-23 07:03:20,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:20,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104703164] [2020-12-23 07:03:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:20,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104703164] [2020-12-23 07:03:20,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426947872] [2020-12-23 07:03:20,576 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:20,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:03:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:03:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:03:20,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:03:20,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-23 07:03:20,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507523040] [2020-12-23 07:03:20,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:03:20,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:03:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:03:20,664 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 4 states. [2020-12-23 07:03:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:20,688 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-12-23 07:03:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:03:20,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 07:03:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:20,690 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:03:20,690 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:03:20,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:03:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:03:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:03:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:03:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-23 07:03:20,695 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2020-12-23 07:03:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:20,695 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-23 07:03:20,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:03:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-23 07:03:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:03:20,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:20,696 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:20,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:20,910 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash 533683348, now seen corresponding path program 1 times [2020-12-23 07:03:20,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:20,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222399298] [2020-12-23 07:03:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:21,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222399298] [2020-12-23 07:03:21,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419977639] [2020-12-23 07:03:21,012 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:21,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:03:21,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:21,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:21,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:03:21,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385989275] [2020-12-23 07:03:21,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:03:21,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:21,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:03:21,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:03:21,136 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 9 states. [2020-12-23 07:03:21,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:21,259 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-12-23 07:03:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:03:21,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 07:03:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:21,265 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:03:21,265 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 07:03:21,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:03:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 07:03:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-12-23 07:03:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:03:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-12-23 07:03:21,282 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 13 [2020-12-23 07:03:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:21,282 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-12-23 07:03:21,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:03:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-12-23 07:03:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:03:21,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:21,284 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:21,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:21,498 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:21,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:21,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1098222449, now seen corresponding path program 3 times [2020-12-23 07:03:21,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:21,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981453934] [2020-12-23 07:03:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:21,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981453934] [2020-12-23 07:03:21,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616762187] [2020-12-23 07:03:21,596 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:21,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:03:21,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:21,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:03:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:21,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:21,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 07:03:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504155740] [2020-12-23 07:03:21,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:03:21,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:21,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:03:21,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:03:21,714 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 9 states. [2020-12-23 07:03:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:21,758 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-23 07:03:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:03:21,759 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 07:03:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:21,759 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:03:21,760 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:03:21,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:03:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:03:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-23 07:03:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:03:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-23 07:03:21,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2020-12-23 07:03:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:21,765 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-23 07:03:21,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:03:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-23 07:03:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:03:21,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:21,766 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:21,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:03:21,981 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1173235057, now seen corresponding path program 2 times [2020-12-23 07:03:21,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:21,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199830968] [2020-12-23 07:03:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:22,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199830968] [2020-12-23 07:03:22,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421438640] [2020-12-23 07:03:22,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:22,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:22,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:22,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:03:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:22,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:22,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:03:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421133465] [2020-12-23 07:03:22,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:03:22,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:03:22,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:03:22,198 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 10 states. [2020-12-23 07:03:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:22,353 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2020-12-23 07:03:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:03:22,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-23 07:03:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:22,355 INFO L225 Difference]: With dead ends: 51 [2020-12-23 07:03:22,355 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 07:03:22,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:03:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 07:03:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-12-23 07:03:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 07:03:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-12-23 07:03:22,361 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 14 [2020-12-23 07:03:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:22,361 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-12-23 07:03:22,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:03:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-12-23 07:03:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:03:22,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:22,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:22,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 07:03:22,577 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:22,578 INFO L82 PathProgramCache]: Analyzing trace with hash 854515253, now seen corresponding path program 4 times [2020-12-23 07:03:22,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:22,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463520348] [2020-12-23 07:03:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:22,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463520348] [2020-12-23 07:03:22,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072778091] [2020-12-23 07:03:22,659 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:22,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:03:22,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:22,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:03:22,750 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:03:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:22,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:22,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:03:22,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895611744] [2020-12-23 07:03:22,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:03:22,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:22,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:03:22,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:03:22,768 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 7 states. [2020-12-23 07:03:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:22,834 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-23 07:03:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:03:22,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 07:03:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:22,836 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:03:22,836 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:03:22,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:03:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:03:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2020-12-23 07:03:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:03:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2020-12-23 07:03:22,844 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 15 [2020-12-23 07:03:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:22,844 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2020-12-23 07:03:22,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:03:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2020-12-23 07:03:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:03:22,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:22,845 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:23,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:23,059 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1746869236, now seen corresponding path program 3 times [2020-12-23 07:03:23,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:23,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305977903] [2020-12-23 07:03:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:03:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305977903] [2020-12-23 07:03:23,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393893922] [2020-12-23 07:03:23,190 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:23,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:03:23,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:23,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:03:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:23,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:23,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2020-12-23 07:03:23,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620180879] [2020-12-23 07:03:23,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:03:23,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:03:23,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:03:23,289 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 12 states. [2020-12-23 07:03:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:23,522 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-12-23 07:03:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:03:23,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-23 07:03:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:23,524 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:03:23,524 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 07:03:23,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 07:03:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-12-23 07:03:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:03:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-12-23 07:03:23,531 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 15 [2020-12-23 07:03:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:23,531 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-12-23 07:03:23,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:03:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-12-23 07:03:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:03:23,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:23,532 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:23,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:23,748 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1259841871, now seen corresponding path program 5 times [2020-12-23 07:03:23,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:23,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757636641] [2020-12-23 07:03:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:23,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757636641] [2020-12-23 07:03:23,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652761711] [2020-12-23 07:03:23,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:23,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:03:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:03:23,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:23,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:23,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-23 07:03:23,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018457416] [2020-12-23 07:03:23,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:03:23,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:03:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:03:23,996 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 11 states. [2020-12-23 07:03:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:24,045 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2020-12-23 07:03:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:03:24,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-23 07:03:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:24,046 INFO L225 Difference]: With dead ends: 53 [2020-12-23 07:03:24,046 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:03:24,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:03:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:03:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:03:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:03:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-12-23 07:03:24,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-12-23 07:03:24,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:24,052 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-12-23 07:03:24,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:03:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-12-23 07:03:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:03:24,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:24,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:24,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:03:24,267 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1966551549, now seen corresponding path program 6 times [2020-12-23 07:03:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210413339] [2020-12-23 07:03:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:03:24,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210413339] [2020-12-23 07:03:24,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538603286] [2020-12-23 07:03:24,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:24,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:03:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:24,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:03:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:03:24,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:24,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-12-23 07:03:24,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567738091] [2020-12-23 07:03:24,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:03:24,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:03:24,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:03:24,510 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 12 states. [2020-12-23 07:03:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:24,602 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-12-23 07:03:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:03:24,603 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-12-23 07:03:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:24,603 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:03:24,603 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 07:03:24,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:03:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 07:03:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-23 07:03:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 07:03:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-12-23 07:03:24,609 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2020-12-23 07:03:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:24,609 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-12-23 07:03:24,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:03:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-12-23 07:03:24,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:03:24,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:24,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:24,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:03:24,825 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1333529985, now seen corresponding path program 7 times [2020-12-23 07:03:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:24,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989997851] [2020-12-23 07:03:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:03:24,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989997851] [2020-12-23 07:03:24,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535986549] [2020-12-23 07:03:24,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:24,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:03:24,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:25,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:03:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:03:25,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:25,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 07:03:25,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685316180] [2020-12-23 07:03:25,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:03:25,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:03:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:03:25,031 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-12-23 07:03:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:25,126 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-12-23 07:03:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:03:25,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-23 07:03:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:25,127 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:03:25,127 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 07:03:25,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:03:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 07:03:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-12-23 07:03:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:03:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-12-23 07:03:25,133 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 18 [2020-12-23 07:03:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:25,133 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-12-23 07:03:25,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:03:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-12-23 07:03:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:03:25,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:25,134 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:25,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:03:25,350 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2021795279, now seen corresponding path program 8 times [2020-12-23 07:03:25,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:25,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587681472] [2020-12-23 07:03:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:25,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587681472] [2020-12-23 07:03:25,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305093887] [2020-12-23 07:03:25,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:25,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:25,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:03:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:25,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:25,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:03:25,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448593687] [2020-12-23 07:03:25,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:03:25,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:25,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:03:25,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:03:25,613 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 12 states. [2020-12-23 07:03:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:25,828 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2020-12-23 07:03:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:03:25,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-23 07:03:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:25,830 INFO L225 Difference]: With dead ends: 78 [2020-12-23 07:03:25,831 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:03:25,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:03:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:03:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-12-23 07:03:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 07:03:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-12-23 07:03:25,848 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 18 [2020-12-23 07:03:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:25,849 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-12-23 07:03:25,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:03:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-12-23 07:03:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:03:25,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:25,849 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:26,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:26,050 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:26,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1110269315, now seen corresponding path program 9 times [2020-12-23 07:03:26,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:26,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112959077] [2020-12-23 07:03:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:03:26,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112959077] [2020-12-23 07:03:26,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939340168] [2020-12-23 07:03:26,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:26,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:03:26,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:26,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:03:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:03:26,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:26,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-12-23 07:03:26,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881151655] [2020-12-23 07:03:26,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:03:26,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:26,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:03:26,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:03:26,335 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 14 states. [2020-12-23 07:03:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:26,410 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-12-23 07:03:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:03:26,410 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-12-23 07:03:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:26,411 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:03:26,411 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 07:03:26,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:03:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 07:03:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 07:03:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:03:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-12-23 07:03:26,416 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2020-12-23 07:03:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:26,416 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-12-23 07:03:26,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:03:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-12-23 07:03:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:03:26,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:26,417 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:26,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:03:26,631 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1199465141, now seen corresponding path program 10 times [2020-12-23 07:03:26,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:26,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716211621] [2020-12-23 07:03:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:26,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716211621] [2020-12-23 07:03:26,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745591234] [2020-12-23 07:03:26,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:26,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:26,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:26,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:03:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:26,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:26,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-12-23 07:03:26,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250953290] [2020-12-23 07:03:26,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:03:26,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:26,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:03:26,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:03:26,880 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 13 states. [2020-12-23 07:03:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:26,981 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-12-23 07:03:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:03:26,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-12-23 07:03:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:26,983 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:03:26,983 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:03:26,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:03:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:03:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-12-23 07:03:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:03:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-12-23 07:03:26,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 19 [2020-12-23 07:03:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:26,996 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-12-23 07:03:26,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:03:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-12-23 07:03:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:03:26,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:26,997 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:27,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:27,211 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash -241816396, now seen corresponding path program 11 times [2020-12-23 07:03:27,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:27,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338358776] [2020-12-23 07:03:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:27,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338358776] [2020-12-23 07:03:27,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254003668] [2020-12-23 07:03:27,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:27,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:03:27,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:03:27,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:27,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:27,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:03:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111519399] [2020-12-23 07:03:27,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:03:27,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:03:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:03:27,507 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 13 states. [2020-12-23 07:03:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:27,740 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2020-12-23 07:03:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:03:27,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-12-23 07:03:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:27,741 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:03:27,741 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 07:03:27,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:03:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 07:03:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-12-23 07:03:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:03:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2020-12-23 07:03:27,747 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 19 [2020-12-23 07:03:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:27,747 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2020-12-23 07:03:27,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:03:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2020-12-23 07:03:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:03:27,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:27,748 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:27,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:27,962 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash 159423631, now seen corresponding path program 12 times [2020-12-23 07:03:27,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:27,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908904796] [2020-12-23 07:03:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908904796] [2020-12-23 07:03:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113772257] [2020-12-23 07:03:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:28,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:03:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:28,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:03:28,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:28,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:28,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2020-12-23 07:03:28,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838876177] [2020-12-23 07:03:28,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:03:28,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:28,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:03:28,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:03:28,274 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 15 states. [2020-12-23 07:03:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:28,426 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-12-23 07:03:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:03:28,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-12-23 07:03:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:28,428 INFO L225 Difference]: With dead ends: 72 [2020-12-23 07:03:28,428 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 07:03:28,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:03:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 07:03:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-12-23 07:03:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 07:03:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-12-23 07:03:28,447 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 20 [2020-12-23 07:03:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:28,447 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-12-23 07:03:28,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:03:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-12-23 07:03:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:03:28,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:28,448 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:28,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:03:28,663 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:28,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1694301585, now seen corresponding path program 13 times [2020-12-23 07:03:28,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:28,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475863432] [2020-12-23 07:03:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:28,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475863432] [2020-12-23 07:03:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888651498] [2020-12-23 07:03:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:28,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:03:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:28,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:28,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:03:28,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651561490] [2020-12-23 07:03:28,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:03:28,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:28,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:03:28,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:03:28,947 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 14 states. [2020-12-23 07:03:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:29,223 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2020-12-23 07:03:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:03:29,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-12-23 07:03:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:29,225 INFO L225 Difference]: With dead ends: 88 [2020-12-23 07:03:29,225 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:03:29,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:03:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:03:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-12-23 07:03:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:03:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-12-23 07:03:29,230 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 20 [2020-12-23 07:03:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:29,231 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-12-23 07:03:29,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:03:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2020-12-23 07:03:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:03:29,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:29,231 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:29,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:29,447 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2017092107, now seen corresponding path program 14 times [2020-12-23 07:03:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:29,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949471993] [2020-12-23 07:03:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:29,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949471993] [2020-12-23 07:03:29,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534360288] [2020-12-23 07:03:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:29,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:29,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:03:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:29,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:03:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:29,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:29,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:03:29,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254625817] [2020-12-23 07:03:29,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:03:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:03:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:03:29,699 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 9 states. [2020-12-23 07:03:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:29,850 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2020-12-23 07:03:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:03:29,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 07:03:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:29,851 INFO L225 Difference]: With dead ends: 128 [2020-12-23 07:03:29,851 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 07:03:29,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:03:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 07:03:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 64. [2020-12-23 07:03:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:03:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2020-12-23 07:03:29,859 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 21 [2020-12-23 07:03:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:29,859 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2020-12-23 07:03:29,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:03:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2020-12-23 07:03:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:03:29,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:29,860 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:30,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:03:30,074 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 747978499, now seen corresponding path program 15 times [2020-12-23 07:03:30,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:30,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446471512] [2020-12-23 07:03:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:30,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446471512] [2020-12-23 07:03:30,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750441145] [2020-12-23 07:03:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:30,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:03:30,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:30,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:03:30,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:30,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:30,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:03:30,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135513792] [2020-12-23 07:03:30,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:03:30,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:03:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:03:30,405 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 12 states. [2020-12-23 07:03:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:30,580 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-12-23 07:03:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:03:30,581 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-23 07:03:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:30,581 INFO L225 Difference]: With dead ends: 85 [2020-12-23 07:03:30,582 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 07:03:30,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:03:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 07:03:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-12-23 07:03:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:03:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2020-12-23 07:03:30,591 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 21 [2020-12-23 07:03:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:30,591 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2020-12-23 07:03:30,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:03:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2020-12-23 07:03:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:03:30,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:30,593 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:30,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:03:30,808 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:30,819 INFO L82 PathProgramCache]: Analyzing trace with hash 523297812, now seen corresponding path program 16 times [2020-12-23 07:03:30,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:30,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376008327] [2020-12-23 07:03:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:30,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376008327] [2020-12-23 07:03:30,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201962048] [2020-12-23 07:03:30,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:31,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:31,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:03:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:31,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:31,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:03:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675797102] [2020-12-23 07:03:31,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:03:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:03:31,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:03:31,109 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 15 states. [2020-12-23 07:03:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:31,410 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2020-12-23 07:03:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:03:31,411 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-12-23 07:03:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:31,411 INFO L225 Difference]: With dead ends: 106 [2020-12-23 07:03:31,411 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 07:03:31,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 07:03:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2020-12-23 07:03:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:03:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2020-12-23 07:03:31,419 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 21 [2020-12-23 07:03:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:31,419 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2020-12-23 07:03:31,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:03:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2020-12-23 07:03:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:03:31,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:31,420 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:31,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:31,634 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash -769603249, now seen corresponding path program 17 times [2020-12-23 07:03:31,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:31,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445529039] [2020-12-23 07:03:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:31,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445529039] [2020-12-23 07:03:31,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818393137] [2020-12-23 07:03:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:32,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:03:32,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:03:32,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:03:32,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:32,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-12-23 07:03:32,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935162395] [2020-12-23 07:03:32,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:03:32,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:32,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:03:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:03:32,181 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand 17 states. [2020-12-23 07:03:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:32,283 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2020-12-23 07:03:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:03:32,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2020-12-23 07:03:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:32,284 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:03:32,285 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:03:32,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:03:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:03:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 07:03:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:03:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2020-12-23 07:03:32,291 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 22 [2020-12-23 07:03:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:32,291 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2020-12-23 07:03:32,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:03:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2020-12-23 07:03:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:03:32,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:32,291 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:32,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:03:32,495 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash 674935231, now seen corresponding path program 18 times [2020-12-23 07:03:32,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:32,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502684171] [2020-12-23 07:03:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:32,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502684171] [2020-12-23 07:03:32,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880816851] [2020-12-23 07:03:32,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:32,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:03:32,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:03:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:32,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:32,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2020-12-23 07:03:32,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927837640] [2020-12-23 07:03:32,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:03:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:32,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:03:32,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:03:32,866 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 16 states. [2020-12-23 07:03:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:33,063 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-12-23 07:03:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:03:33,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-12-23 07:03:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:33,064 INFO L225 Difference]: With dead ends: 85 [2020-12-23 07:03:33,065 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 07:03:33,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:03:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 07:03:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-12-23 07:03:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:03:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2020-12-23 07:03:33,072 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 22 [2020-12-23 07:03:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:33,072 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2020-12-23 07:03:33,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:03:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2020-12-23 07:03:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:03:33,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:33,073 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:33,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:33,288 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:33,288 INFO L82 PathProgramCache]: Analyzing trace with hash 549402383, now seen corresponding path program 19 times [2020-12-23 07:03:33,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:33,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449355708] [2020-12-23 07:03:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:33,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449355708] [2020-12-23 07:03:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480387430] [2020-12-23 07:03:33,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:03:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:33,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:33,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:03:33,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016495724] [2020-12-23 07:03:33,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:03:33,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:03:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:03:33,619 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 16 states. [2020-12-23 07:03:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:34,004 INFO L93 Difference]: Finished difference Result 107 states and 147 transitions. [2020-12-23 07:03:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:03:34,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-12-23 07:03:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:34,005 INFO L225 Difference]: With dead ends: 107 [2020-12-23 07:03:34,005 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 07:03:34,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:03:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 07:03:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-12-23 07:03:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:03:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2020-12-23 07:03:34,013 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 22 [2020-12-23 07:03:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:34,014 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2020-12-23 07:03:34,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:03:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2020-12-23 07:03:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:03:34,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:34,014 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:34,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:03:34,230 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1589406077, now seen corresponding path program 20 times [2020-12-23 07:03:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:34,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539874446] [2020-12-23 07:03:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:34,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539874446] [2020-12-23 07:03:34,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639167414] [2020-12-23 07:03:34,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:34,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:03:34,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:34,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:34,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2020-12-23 07:03:34,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027486581] [2020-12-23 07:03:34,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:03:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:34,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:03:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:34,627 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand 18 states. [2020-12-23 07:03:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:34,852 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-12-23 07:03:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:03:34,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-12-23 07:03:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:34,853 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:03:34,853 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 07:03:34,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 07:03:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-12-23 07:03:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 07:03:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2020-12-23 07:03:34,861 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 23 [2020-12-23 07:03:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:34,861 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2020-12-23 07:03:34,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:03:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2020-12-23 07:03:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:03:34,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:34,862 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:35,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:03:35,076 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:35,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1771563211, now seen corresponding path program 21 times [2020-12-23 07:03:35,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:35,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582537532] [2020-12-23 07:03:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:35,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582537532] [2020-12-23 07:03:35,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664831912] [2020-12-23 07:03:35,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:03:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:03:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:35,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:35,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:03:35,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324905292] [2020-12-23 07:03:35,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:03:35,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:03:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:03:35,410 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand 13 states. [2020-12-23 07:03:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:35,678 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2020-12-23 07:03:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:03:35,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-23 07:03:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:35,680 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:03:35,681 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 07:03:35,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 07:03:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-12-23 07:03:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 07:03:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-12-23 07:03:35,688 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 23 [2020-12-23 07:03:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:35,689 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-12-23 07:03:35,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:03:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-12-23 07:03:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:03:35,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:35,689 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:35,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:35,905 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1358644084, now seen corresponding path program 22 times [2020-12-23 07:03:35,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:35,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839375481] [2020-12-23 07:03:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:36,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839375481] [2020-12-23 07:03:36,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937493227] [2020-12-23 07:03:36,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:36,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:36,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:36,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:03:36,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:36,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:36,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-23 07:03:36,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41586011] [2020-12-23 07:03:36,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:03:36,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:03:36,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:36,292 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 18 states. [2020-12-23 07:03:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:36,770 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2020-12-23 07:03:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:03:36,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-12-23 07:03:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:36,772 INFO L225 Difference]: With dead ends: 116 [2020-12-23 07:03:36,772 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 07:03:36,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:03:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 07:03:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2020-12-23 07:03:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 07:03:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-12-23 07:03:36,781 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 23 [2020-12-23 07:03:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:36,782 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-12-23 07:03:36,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:03:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-12-23 07:03:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:03:36,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:36,782 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:36,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:36,996 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1230457407, now seen corresponding path program 23 times [2020-12-23 07:03:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:36,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369691594] [2020-12-23 07:03:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:37,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369691594] [2020-12-23 07:03:37,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214236290] [2020-12-23 07:03:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:37,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 07:03:37,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:37,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:03:37,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:37,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:03:37,803 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 07:03:37,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:37,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 21] total 23 [2020-12-23 07:03:37,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196668723] [2020-12-23 07:03:37,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:03:37,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:03:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:03:37,806 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 23 states. [2020-12-23 07:03:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:38,523 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2020-12-23 07:03:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:03:38,523 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 24 [2020-12-23 07:03:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:38,525 INFO L225 Difference]: With dead ends: 198 [2020-12-23 07:03:38,525 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 07:03:38,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:03:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 07:03:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 83. [2020-12-23 07:03:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:03:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-12-23 07:03:38,546 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 24 [2020-12-23 07:03:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:38,546 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-12-23 07:03:38,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:03:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-12-23 07:03:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:03:38,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:38,547 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:38,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 07:03:38,751 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1233489969, now seen corresponding path program 24 times [2020-12-23 07:03:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:38,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178973973] [2020-12-23 07:03:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:38,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178973973] [2020-12-23 07:03:38,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136399796] [2020-12-23 07:03:38,938 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:39,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:03:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:39,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:03:39,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:39,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:39,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:03:39,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739714160] [2020-12-23 07:03:39,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:03:39,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:39,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:03:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:03:39,074 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 14 states. [2020-12-23 07:03:39,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:39,437 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-12-23 07:03:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:03:39,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-12-23 07:03:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:39,439 INFO L225 Difference]: With dead ends: 106 [2020-12-23 07:03:39,439 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 07:03:39,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:03:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 07:03:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2020-12-23 07:03:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:03:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2020-12-23 07:03:39,450 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 24 [2020-12-23 07:03:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:39,450 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2020-12-23 07:03:39,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:03:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2020-12-23 07:03:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:03:39,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:39,451 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:39,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:39,661 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 675333039, now seen corresponding path program 25 times [2020-12-23 07:03:39,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:39,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487623933] [2020-12-23 07:03:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487623933] [2020-12-23 07:03:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040550853] [2020-12-23 07:03:39,918 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:39,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:03:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:40,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:40,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:03:40,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4212901] [2020-12-23 07:03:40,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:03:40,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:03:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:40,036 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand 18 states. [2020-12-23 07:03:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:40,609 INFO L93 Difference]: Finished difference Result 135 states and 188 transitions. [2020-12-23 07:03:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:03:40,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2020-12-23 07:03:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:40,612 INFO L225 Difference]: With dead ends: 135 [2020-12-23 07:03:40,613 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 07:03:40,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:03:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 07:03:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2020-12-23 07:03:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 07:03:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2020-12-23 07:03:40,624 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 24 [2020-12-23 07:03:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:40,624 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2020-12-23 07:03:40,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:03:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2020-12-23 07:03:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:03:40,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:40,625 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:40,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 07:03:40,839 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1548087805, now seen corresponding path program 26 times [2020-12-23 07:03:40,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:40,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040315653] [2020-12-23 07:03:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:41,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040315653] [2020-12-23 07:03:41,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249428842] [2020-12-23 07:03:41,024 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:41,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:41,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:03:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:03:41,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:41,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2020-12-23 07:03:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260085624] [2020-12-23 07:03:41,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:03:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:41,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:03:41,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:03:41,287 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand 20 states. [2020-12-23 07:03:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:41,416 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2020-12-23 07:03:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:03:41,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-23 07:03:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:41,417 INFO L225 Difference]: With dead ends: 100 [2020-12-23 07:03:41,417 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 07:03:41,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:03:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 07:03:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-23 07:03:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 07:03:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2020-12-23 07:03:41,426 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 25 [2020-12-23 07:03:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:41,426 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2020-12-23 07:03:41,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:03:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2020-12-23 07:03:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:03:41,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:41,427 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:41,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:03:41,642 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1733088651, now seen corresponding path program 27 times [2020-12-23 07:03:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:41,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689113459] [2020-12-23 07:03:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:41,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689113459] [2020-12-23 07:03:41,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718585579] [2020-12-23 07:03:41,816 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:41,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:03:41,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:41,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:03:41,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:42,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:42,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2020-12-23 07:03:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561140301] [2020-12-23 07:03:42,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:03:42,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:42,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:03:42,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:03:42,088 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 19 states. [2020-12-23 07:03:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:42,280 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-12-23 07:03:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:03:42,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2020-12-23 07:03:42,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:42,281 INFO L225 Difference]: With dead ends: 105 [2020-12-23 07:03:42,281 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 07:03:42,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:03:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 07:03:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2020-12-23 07:03:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:03:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-12-23 07:03:42,290 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 25 [2020-12-23 07:03:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:42,291 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-12-23 07:03:42,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:03:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-12-23 07:03:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:03:42,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:42,291 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:42,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:03:42,507 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:42,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1209974787, now seen corresponding path program 28 times [2020-12-23 07:03:42,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:42,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65980260] [2020-12-23 07:03:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:42,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65980260] [2020-12-23 07:03:42,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4454066] [2020-12-23 07:03:42,694 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:42,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:42,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:42,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:03:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:42,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:42,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:03:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691185815] [2020-12-23 07:03:42,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:03:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:42,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:03:42,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:03:42,810 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 14 states. [2020-12-23 07:03:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:43,107 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2020-12-23 07:03:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:03:43,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-12-23 07:03:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:43,109 INFO L225 Difference]: With dead ends: 108 [2020-12-23 07:03:43,109 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 07:03:43,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:03:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 07:03:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-12-23 07:03:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:03:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2020-12-23 07:03:43,117 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 25 [2020-12-23 07:03:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:43,117 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2020-12-23 07:03:43,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:03:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2020-12-23 07:03:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:03:43,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:43,118 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:43,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:03:43,333 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash 967527124, now seen corresponding path program 29 times [2020-12-23 07:03:43,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:43,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546437487] [2020-12-23 07:03:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:43,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546437487] [2020-12-23 07:03:43,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107247104] [2020-12-23 07:03:43,604 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:44,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:03:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:03:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:44,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:44,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 07:03:44,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031892502] [2020-12-23 07:03:44,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:03:44,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:03:44,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:03:44,424 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand 20 states. [2020-12-23 07:03:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:44,983 INFO L93 Difference]: Finished difference Result 136 states and 190 transitions. [2020-12-23 07:03:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:03:44,984 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2020-12-23 07:03:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:44,985 INFO L225 Difference]: With dead ends: 136 [2020-12-23 07:03:44,985 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 07:03:44,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:03:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 07:03:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2020-12-23 07:03:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 07:03:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2020-12-23 07:03:44,995 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 25 [2020-12-23 07:03:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:44,995 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2020-12-23 07:03:44,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:03:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2020-12-23 07:03:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:03:44,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:44,996 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:45,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:03:45,200 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash -40778609, now seen corresponding path program 30 times [2020-12-23 07:03:45,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:45,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60462567] [2020-12-23 07:03:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60462567] [2020-12-23 07:03:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170770509] [2020-12-23 07:03:45,416 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:45,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 07:03:45,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:03:45,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:45,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:45,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2020-12-23 07:03:45,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094562387] [2020-12-23 07:03:45,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:03:45,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:45,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:03:45,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:03:45,736 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand 21 states. [2020-12-23 07:03:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:45,959 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-12-23 07:03:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:03:45,960 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-23 07:03:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:45,960 INFO L225 Difference]: With dead ends: 113 [2020-12-23 07:03:45,960 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 07:03:45,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:03:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 07:03:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-12-23 07:03:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 07:03:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2020-12-23 07:03:45,969 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 26 [2020-12-23 07:03:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:45,970 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2020-12-23 07:03:45,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:03:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2020-12-23 07:03:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:03:45,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:45,970 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:46,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:03:46,184 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:46,184 INFO L82 PathProgramCache]: Analyzing trace with hash 886264063, now seen corresponding path program 31 times [2020-12-23 07:03:46,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:46,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214373527] [2020-12-23 07:03:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:46,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214373527] [2020-12-23 07:03:46,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299208186] [2020-12-23 07:03:46,363 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:03:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:46,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:46,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:03:46,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685971389] [2020-12-23 07:03:46,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:03:46,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:03:46,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:03:46,479 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 15 states. [2020-12-23 07:03:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:46,883 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2020-12-23 07:03:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:03:46,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-23 07:03:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:46,885 INFO L225 Difference]: With dead ends: 116 [2020-12-23 07:03:46,885 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 07:03:46,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:03:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 07:03:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-12-23 07:03:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 07:03:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2020-12-23 07:03:46,895 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 26 [2020-12-23 07:03:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:46,895 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2020-12-23 07:03:46,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:03:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2020-12-23 07:03:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:03:46,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:46,896 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:47,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:03:47,112 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1435609167, now seen corresponding path program 32 times [2020-12-23 07:03:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:47,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233441221] [2020-12-23 07:03:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:47,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233441221] [2020-12-23 07:03:47,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300956762] [2020-12-23 07:03:47,448 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:47,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:03:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:47,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:47,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 07:03:47,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173890229] [2020-12-23 07:03:47,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:03:47,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:47,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:03:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:03:47,566 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 20 states. [2020-12-23 07:03:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:48,230 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2020-12-23 07:03:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:03:48,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-12-23 07:03:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:48,232 INFO L225 Difference]: With dead ends: 145 [2020-12-23 07:03:48,232 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 07:03:48,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:03:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 07:03:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 98. [2020-12-23 07:03:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 07:03:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2020-12-23 07:03:48,242 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 26 [2020-12-23 07:03:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:48,243 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2020-12-23 07:03:48,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:03:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2020-12-23 07:03:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:03:48,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:48,244 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:48,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:48,457 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:48,459 INFO L82 PathProgramCache]: Analyzing trace with hash 881225141, now seen corresponding path program 33 times [2020-12-23 07:03:48,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:48,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370869345] [2020-12-23 07:03:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370869345] [2020-12-23 07:03:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343691114] [2020-12-23 07:03:48,616 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:48,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:03:48,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:48,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:03:48,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:48,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:03:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:48,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:48,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 07:03:48,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946328759] [2020-12-23 07:03:48,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:03:48,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:48,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:03:48,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:03:48,796 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand 11 states. [2020-12-23 07:03:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:49,027 INFO L93 Difference]: Finished difference Result 251 states and 320 transitions. [2020-12-23 07:03:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:03:49,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-12-23 07:03:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:49,029 INFO L225 Difference]: With dead ends: 251 [2020-12-23 07:03:49,029 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 07:03:49,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:03:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 07:03:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 102. [2020-12-23 07:03:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 07:03:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2020-12-23 07:03:49,041 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 27 [2020-12-23 07:03:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:49,041 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2020-12-23 07:03:49,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:03:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2020-12-23 07:03:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:03:49,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:49,042 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:49,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:49,257 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:49,257 INFO L82 PathProgramCache]: Analyzing trace with hash -558833789, now seen corresponding path program 34 times [2020-12-23 07:03:49,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:49,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99928811] [2020-12-23 07:03:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:49,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99928811] [2020-12-23 07:03:49,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680448480] [2020-12-23 07:03:49,474 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:49,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:49,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:03:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:49,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:49,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:03:49,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331622595] [2020-12-23 07:03:49,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:03:49,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:03:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:03:49,628 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand 16 states. [2020-12-23 07:03:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:50,044 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2020-12-23 07:03:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:03:50,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-23 07:03:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:50,046 INFO L225 Difference]: With dead ends: 127 [2020-12-23 07:03:50,046 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 07:03:50,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:03:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 07:03:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2020-12-23 07:03:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 07:03:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2020-12-23 07:03:50,057 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 27 [2020-12-23 07:03:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:50,059 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2020-12-23 07:03:50,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:03:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2020-12-23 07:03:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:03:50,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:50,060 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:50,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:50,275 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash 481819573, now seen corresponding path program 35 times [2020-12-23 07:03:50,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:50,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294557687] [2020-12-23 07:03:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:03:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294557687] [2020-12-23 07:03:50,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893499711] [2020-12-23 07:03:50,457 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:51,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:03:51,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:03:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:03:51,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:51,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2020-12-23 07:03:51,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960470672] [2020-12-23 07:03:51,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:03:51,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:51,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:03:51,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:03:51,527 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand 18 states. [2020-12-23 07:03:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:51,896 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2020-12-23 07:03:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:03:51,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-12-23 07:03:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:51,902 INFO L225 Difference]: With dead ends: 130 [2020-12-23 07:03:51,902 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 07:03:51,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:03:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 07:03:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2020-12-23 07:03:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 07:03:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 135 transitions. [2020-12-23 07:03:51,914 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 135 transitions. Word has length 27 [2020-12-23 07:03:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:51,914 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 135 transitions. [2020-12-23 07:03:51,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:03:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 135 transitions. [2020-12-23 07:03:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:03:51,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:51,915 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:52,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 07:03:52,119 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:52,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1233716684, now seen corresponding path program 36 times [2020-12-23 07:03:52,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:52,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658579272] [2020-12-23 07:03:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:03:52,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658579272] [2020-12-23 07:03:52,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041822930] [2020-12-23 07:03:52,442 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:52,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:03:52,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:03:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-23 07:03:52,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:52,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2020-12-23 07:03:52,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136799710] [2020-12-23 07:03:52,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:03:52,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:52,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:03:52,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:03:52,629 INFO L87 Difference]: Start difference. First operand 104 states and 135 transitions. Second operand 24 states. [2020-12-23 07:03:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:54,243 INFO L93 Difference]: Finished difference Result 167 states and 235 transitions. [2020-12-23 07:03:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 07:03:54,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-23 07:03:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:54,245 INFO L225 Difference]: With dead ends: 167 [2020-12-23 07:03:54,245 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 07:03:54,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=1930, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:03:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 07:03:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2020-12-23 07:03:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 07:03:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2020-12-23 07:03:54,257 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 27 [2020-12-23 07:03:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:54,257 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2020-12-23 07:03:54,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:03:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2020-12-23 07:03:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:03:54,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:54,258 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:54,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:54,459 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash -601429681, now seen corresponding path program 37 times [2020-12-23 07:03:54,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:54,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447325849] [2020-12-23 07:03:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:54,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447325849] [2020-12-23 07:03:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357296165] [2020-12-23 07:03:54,690 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:54,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:03:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:03:55,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:55,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2020-12-23 07:03:55,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684828764] [2020-12-23 07:03:55,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:03:55,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:03:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:03:55,025 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 23 states. [2020-12-23 07:03:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:55,280 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2020-12-23 07:03:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:03:55,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2020-12-23 07:03:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:55,286 INFO L225 Difference]: With dead ends: 120 [2020-12-23 07:03:55,286 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 07:03:55,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:03:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 07:03:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-23 07:03:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 07:03:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2020-12-23 07:03:55,296 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 28 [2020-12-23 07:03:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:55,296 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2020-12-23 07:03:55,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:03:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2020-12-23 07:03:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:03:55,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:55,296 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:55,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:55,497 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1887773055, now seen corresponding path program 38 times [2020-12-23 07:03:55,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:55,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665944306] [2020-12-23 07:03:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:55,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665944306] [2020-12-23 07:03:55,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314499151] [2020-12-23 07:03:55,759 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:55,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:55,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:55,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:03:55,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:56,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:56,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2020-12-23 07:03:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11981890] [2020-12-23 07:03:56,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:03:56,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:03:56,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:03:56,048 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 22 states. [2020-12-23 07:03:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:56,399 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-12-23 07:03:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:03:56,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-23 07:03:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:56,400 INFO L225 Difference]: With dead ends: 125 [2020-12-23 07:03:56,401 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 07:03:56,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:03:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 07:03:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-12-23 07:03:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 07:03:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2020-12-23 07:03:56,411 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 28 [2020-12-23 07:03:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:56,411 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 131 transitions. [2020-12-23 07:03:56,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:03:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 131 transitions. [2020-12-23 07:03:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:03:56,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:56,412 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:56,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 07:03:56,626 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:56,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:56,626 INFO L82 PathProgramCache]: Analyzing trace with hash 561324815, now seen corresponding path program 39 times [2020-12-23 07:03:56,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:56,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747166800] [2020-12-23 07:03:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:03:56,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747166800] [2020-12-23 07:03:56,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364663012] [2020-12-23 07:03:56,834 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:57,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:03:57,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:57,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:03:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:03:57,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:57,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:03:57,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704731637] [2020-12-23 07:03:57,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:03:57,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:03:57,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:03:57,135 INFO L87 Difference]: Start difference. First operand 101 states and 131 transitions. Second operand 16 states. [2020-12-23 07:03:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:57,607 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2020-12-23 07:03:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:03:57,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-12-23 07:03:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:57,608 INFO L225 Difference]: With dead ends: 128 [2020-12-23 07:03:57,608 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 07:03:57,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:03:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 07:03:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2020-12-23 07:03:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 07:03:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2020-12-23 07:03:57,617 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 28 [2020-12-23 07:03:57,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:57,617 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2020-12-23 07:03:57,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:03:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2020-12-23 07:03:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:03:57,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:57,618 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:57,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:03:57,819 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:57,820 INFO L82 PathProgramCache]: Analyzing trace with hash -975611042, now seen corresponding path program 40 times [2020-12-23 07:03:57,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:57,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030897281] [2020-12-23 07:03:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030897281] [2020-12-23 07:03:58,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540418315] [2020-12-23 07:03:58,260 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:58,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:03:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:03:58,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:58,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 07:03:58,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019423656] [2020-12-23 07:03:58,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:03:58,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:03:58,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:03:58,399 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 23 states. [2020-12-23 07:03:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:59,377 INFO L93 Difference]: Finished difference Result 163 states and 230 transitions. [2020-12-23 07:03:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:03:59,378 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2020-12-23 07:03:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:59,379 INFO L225 Difference]: With dead ends: 163 [2020-12-23 07:03:59,379 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 07:03:59,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:03:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 07:03:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-12-23 07:03:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 07:03:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2020-12-23 07:03:59,388 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 28 [2020-12-23 07:03:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:59,388 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2020-12-23 07:03:59,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:03:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2020-12-23 07:03:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:03:59,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:59,389 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:59,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:03:59,589 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash 423173891, now seen corresponding path program 41 times [2020-12-23 07:03:59,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:59,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004131217] [2020-12-23 07:03:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:03:59,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004131217] [2020-12-23 07:03:59,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966315026] [2020-12-23 07:03:59,828 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:00,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:04:00,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 07:04:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:04:01,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:01,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2020-12-23 07:04:01,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147329706] [2020-12-23 07:04:01,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:04:01,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:01,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:04:01,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:04:01,012 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 24 states. [2020-12-23 07:04:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:01,308 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2020-12-23 07:04:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:04:01,309 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-12-23 07:04:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:01,309 INFO L225 Difference]: With dead ends: 134 [2020-12-23 07:04:01,309 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 07:04:01,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:04:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 07:04:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2020-12-23 07:04:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 07:04:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-12-23 07:04:01,319 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 29 [2020-12-23 07:04:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:01,319 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-12-23 07:04:01,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:04:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-12-23 07:04:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:04:01,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:01,320 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:01,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:01,524 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:01,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1268979979, now seen corresponding path program 42 times [2020-12-23 07:04:01,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:01,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640298374] [2020-12-23 07:04:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:01,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640298374] [2020-12-23 07:04:01,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300950498] [2020-12-23 07:04:01,785 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:01,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:04:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:04:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:01,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:01,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:04:01,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913474894] [2020-12-23 07:04:01,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:04:01,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:04:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:04:01,964 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 17 states. [2020-12-23 07:04:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:02,485 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2020-12-23 07:04:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:04:02,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-12-23 07:04:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:02,487 INFO L225 Difference]: With dead ends: 137 [2020-12-23 07:04:02,487 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 07:04:02,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:04:02,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 07:04:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2020-12-23 07:04:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 07:04:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 143 transitions. [2020-12-23 07:04:02,497 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 143 transitions. Word has length 29 [2020-12-23 07:04:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:02,497 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 143 transitions. [2020-12-23 07:04:02,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:04:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 143 transitions. [2020-12-23 07:04:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:04:02,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:02,497 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:02,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:02,698 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:02,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:02,699 INFO L82 PathProgramCache]: Analyzing trace with hash 926503171, now seen corresponding path program 43 times [2020-12-23 07:04:02,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:02,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484753532] [2020-12-23 07:04:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484753532] [2020-12-23 07:04:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072889350] [2020-12-23 07:04:02,896 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:04:02,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:03,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:03,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:04:03,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255137037] [2020-12-23 07:04:03,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:04:03,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:04:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:04:03,012 INFO L87 Difference]: Start difference. First operand 111 states and 143 transitions. Second operand 16 states. [2020-12-23 07:04:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:03,439 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2020-12-23 07:04:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:04:03,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-12-23 07:04:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:03,443 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:04:03,443 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 07:04:03,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:04:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 07:04:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2020-12-23 07:04:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 07:04:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2020-12-23 07:04:03,453 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 29 [2020-12-23 07:04:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:03,453 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2020-12-23 07:04:03,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:04:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2020-12-23 07:04:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:04:03,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:03,454 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:03,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:03,655 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2102278141, now seen corresponding path program 44 times [2020-12-23 07:04:03,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:03,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896750919] [2020-12-23 07:04:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:04:04,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896750919] [2020-12-23 07:04:04,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184596069] [2020-12-23 07:04:04,059 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:04,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:04,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:04:04,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:04:04,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:04,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:04:04,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103715695] [2020-12-23 07:04:04,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:04:04,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:04,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:04:04,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:04:04,217 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand 24 states. [2020-12-23 07:04:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:05,324 INFO L93 Difference]: Finished difference Result 174 states and 244 transitions. [2020-12-23 07:04:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:04:05,325 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-12-23 07:04:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:05,326 INFO L225 Difference]: With dead ends: 174 [2020-12-23 07:04:05,327 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 07:04:05,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:04:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 07:04:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 119. [2020-12-23 07:04:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 07:04:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2020-12-23 07:04:05,338 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 29 [2020-12-23 07:04:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:05,339 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2020-12-23 07:04:05,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:04:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2020-12-23 07:04:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:04:05,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:05,339 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:05,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:05,540 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2029727233, now seen corresponding path program 45 times [2020-12-23 07:04:05,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:05,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665803515] [2020-12-23 07:04:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:04:05,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665803515] [2020-12-23 07:04:05,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187449851] [2020-12-23 07:04:05,713 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:05,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:04:05,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:05,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:04:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:05,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:04:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:04:05,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:05,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:04:05,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655972584] [2020-12-23 07:04:05,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:04:05,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:04:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:04:05,973 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand 12 states. [2020-12-23 07:04:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:06,291 INFO L93 Difference]: Finished difference Result 322 states and 412 transitions. [2020-12-23 07:04:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:04:06,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-12-23 07:04:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:06,293 INFO L225 Difference]: With dead ends: 322 [2020-12-23 07:04:06,293 INFO L226 Difference]: Without dead ends: 310 [2020-12-23 07:04:06,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:04:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-23 07:04:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 123. [2020-12-23 07:04:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 07:04:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2020-12-23 07:04:06,308 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 30 [2020-12-23 07:04:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:06,308 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2020-12-23 07:04:06,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:04:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2020-12-23 07:04:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:04:06,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:06,309 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:06,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 07:04:06,523 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:06,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:06,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2121113551, now seen corresponding path program 46 times [2020-12-23 07:04:06,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:06,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651951730] [2020-12-23 07:04:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:06,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651951730] [2020-12-23 07:04:06,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722354269] [2020-12-23 07:04:06,790 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:06,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:04:06,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:06,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:04:06,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:06,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:06,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:04:06,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299125719] [2020-12-23 07:04:06,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:04:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:06,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:04:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:04:06,928 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand 18 states. [2020-12-23 07:04:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:07,578 INFO L93 Difference]: Finished difference Result 150 states and 185 transitions. [2020-12-23 07:04:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:04:07,579 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-12-23 07:04:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:07,580 INFO L225 Difference]: With dead ends: 150 [2020-12-23 07:04:07,580 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 07:04:07,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:04:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 07:04:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2020-12-23 07:04:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 07:04:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2020-12-23 07:04:07,595 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 30 [2020-12-23 07:04:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:07,595 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2020-12-23 07:04:07,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:04:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2020-12-23 07:04:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:04:07,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:07,596 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:07,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:07,810 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:07,810 INFO L82 PathProgramCache]: Analyzing trace with hash -344076225, now seen corresponding path program 47 times [2020-12-23 07:04:07,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:07,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100584491] [2020-12-23 07:04:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:08,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100584491] [2020-12-23 07:04:08,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99293598] [2020-12-23 07:04:08,069 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:08,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 07:04:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:04:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:08,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:08,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:04:08,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324515485] [2020-12-23 07:04:08,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:04:08,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:08,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:04:08,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:04:08,829 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand 17 states. [2020-12-23 07:04:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:09,367 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2020-12-23 07:04:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:04:09,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-12-23 07:04:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:09,371 INFO L225 Difference]: With dead ends: 153 [2020-12-23 07:04:09,372 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 07:04:09,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:04:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 07:04:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2020-12-23 07:04:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 07:04:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2020-12-23 07:04:09,385 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 30 [2020-12-23 07:04:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:09,385 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2020-12-23 07:04:09,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:04:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2020-12-23 07:04:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:04:09,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:09,386 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:09,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:04:09,590 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1625747454, now seen corresponding path program 48 times [2020-12-23 07:04:09,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:09,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57051618] [2020-12-23 07:04:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:04:10,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57051618] [2020-12-23 07:04:10,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241839591] [2020-12-23 07:04:10,110 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:10,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:04:10,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:10,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:04:10,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-12-23 07:04:10,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:10,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6] total 28 [2020-12-23 07:04:10,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723969445] [2020-12-23 07:04:10,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:04:10,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:04:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:04:10,358 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand 28 states. [2020-12-23 07:04:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:12,687 INFO L93 Difference]: Finished difference Result 211 states and 301 transitions. [2020-12-23 07:04:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:04:12,688 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-23 07:04:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:12,689 INFO L225 Difference]: With dead ends: 211 [2020-12-23 07:04:12,689 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 07:04:12,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:04:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 07:04:12,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-12-23 07:04:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 07:04:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2020-12-23 07:04:12,703 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 30 [2020-12-23 07:04:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:12,704 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2020-12-23 07:04:12,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:04:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2020-12-23 07:04:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:04:12,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:12,705 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:12,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:04:12,918 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash -760250749, now seen corresponding path program 49 times [2020-12-23 07:04:12,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:12,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762000860] [2020-12-23 07:04:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:04:13,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762000860] [2020-12-23 07:04:13,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349749022] [2020-12-23 07:04:13,248 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:04:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 07:04:13,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:13,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2020-12-23 07:04:13,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441054687] [2020-12-23 07:04:13,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:04:13,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:04:13,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:04:13,660 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand 26 states. [2020-12-23 07:04:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:13,982 INFO L93 Difference]: Finished difference Result 149 states and 185 transitions. [2020-12-23 07:04:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:04:13,983 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2020-12-23 07:04:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:13,984 INFO L225 Difference]: With dead ends: 149 [2020-12-23 07:04:13,984 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 07:04:13,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:04:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 07:04:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-23 07:04:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 07:04:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2020-12-23 07:04:13,996 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 31 [2020-12-23 07:04:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:13,996 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2020-12-23 07:04:13,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:04:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2020-12-23 07:04:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:04:13,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:13,997 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:14,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:14,211 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash -160169419, now seen corresponding path program 50 times [2020-12-23 07:04:14,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:14,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801398368] [2020-12-23 07:04:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:14,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801398368] [2020-12-23 07:04:14,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323336770] [2020-12-23 07:04:14,481 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:14,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:14,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:04:14,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:14,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:14,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2020-12-23 07:04:14,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864618423] [2020-12-23 07:04:14,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:04:14,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:04:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:04:14,791 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand 25 states. [2020-12-23 07:04:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:15,204 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2020-12-23 07:04:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:04:15,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 31 [2020-12-23 07:04:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:15,205 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:04:15,205 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 07:04:15,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:04:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 07:04:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2020-12-23 07:04:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 07:04:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 163 transitions. [2020-12-23 07:04:15,217 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 163 transitions. Word has length 31 [2020-12-23 07:04:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:15,217 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 163 transitions. [2020-12-23 07:04:15,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:04:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 163 transitions. [2020-12-23 07:04:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:04:15,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:15,218 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:15,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 07:04:15,431 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1077331837, now seen corresponding path program 51 times [2020-12-23 07:04:15,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:15,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230065734] [2020-12-23 07:04:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:15,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230065734] [2020-12-23 07:04:15,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799927124] [2020-12-23 07:04:15,681 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:16,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:04:16,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:04:16,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:16,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:16,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 22 [2020-12-23 07:04:16,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46930787] [2020-12-23 07:04:16,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:04:16,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:16,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:04:16,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:04:16,300 INFO L87 Difference]: Start difference. First operand 128 states and 163 transitions. Second operand 22 states. [2020-12-23 07:04:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:16,922 INFO L93 Difference]: Finished difference Result 157 states and 191 transitions. [2020-12-23 07:04:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:04:16,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-12-23 07:04:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:16,923 INFO L225 Difference]: With dead ends: 157 [2020-12-23 07:04:16,924 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 07:04:16,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:04:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 07:04:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2020-12-23 07:04:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 07:04:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 164 transitions. [2020-12-23 07:04:16,937 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 164 transitions. Word has length 31 [2020-12-23 07:04:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:16,937 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 164 transitions. [2020-12-23 07:04:16,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:04:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 164 transitions. [2020-12-23 07:04:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:04:16,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:16,938 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:17,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:17,142 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1736830923, now seen corresponding path program 52 times [2020-12-23 07:04:17,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:17,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640478830] [2020-12-23 07:04:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640478830] [2020-12-23 07:04:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881681703] [2020-12-23 07:04:17,364 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:17,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:04:17,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:17,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:04:17,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:17,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:17,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:04:17,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861956705] [2020-12-23 07:04:17,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:04:17,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:17,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:04:17,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:04:17,516 INFO L87 Difference]: Start difference. First operand 129 states and 164 transitions. Second operand 17 states. [2020-12-23 07:04:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:18,004 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2020-12-23 07:04:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:04:18,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-12-23 07:04:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:18,006 INFO L225 Difference]: With dead ends: 160 [2020-12-23 07:04:18,007 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 07:04:18,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:04:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 07:04:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 130. [2020-12-23 07:04:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 07:04:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2020-12-23 07:04:18,021 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 31 [2020-12-23 07:04:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:18,021 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2020-12-23 07:04:18,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:04:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2020-12-23 07:04:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:04:18,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:18,022 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:18,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-12-23 07:04:18,235 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:18,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2134502543, now seen corresponding path program 53 times [2020-12-23 07:04:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:18,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130125227] [2020-12-23 07:04:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:18,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130125227] [2020-12-23 07:04:18,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344831603] [2020-12-23 07:04:18,569 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:20,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 07:04:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:20,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:04:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:20,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:20,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2020-12-23 07:04:20,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133943816] [2020-12-23 07:04:20,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:04:20,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:20,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:04:20,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:04:20,535 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand 27 states. [2020-12-23 07:04:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:21,068 INFO L93 Difference]: Finished difference Result 157 states and 191 transitions. [2020-12-23 07:04:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:04:21,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-12-23 07:04:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:21,070 INFO L225 Difference]: With dead ends: 157 [2020-12-23 07:04:21,070 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 07:04:21,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:04:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 07:04:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2020-12-23 07:04:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 07:04:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2020-12-23 07:04:21,080 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 32 [2020-12-23 07:04:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:21,080 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2020-12-23 07:04:21,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:04:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2020-12-23 07:04:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:04:21,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:21,081 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:21,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:21,285 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:21,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1961547967, now seen corresponding path program 54 times [2020-12-23 07:04:21,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:21,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782525342] [2020-12-23 07:04:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:21,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782525342] [2020-12-23 07:04:21,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345668080] [2020-12-23 07:04:21,589 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:21,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 07:04:21,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:21,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:04:21,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:22,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:22,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2020-12-23 07:04:22,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788709730] [2020-12-23 07:04:22,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:04:22,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:22,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:04:22,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:04:22,095 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 24 states. [2020-12-23 07:04:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:22,808 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2020-12-23 07:04:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:04:22,809 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-12-23 07:04:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:22,810 INFO L225 Difference]: With dead ends: 160 [2020-12-23 07:04:22,810 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 07:04:22,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:04:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 07:04:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-12-23 07:04:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 07:04:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2020-12-23 07:04:22,824 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 32 [2020-12-23 07:04:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:22,824 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2020-12-23 07:04:22,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:04:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2020-12-23 07:04:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:04:22,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:22,825 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:23,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-12-23 07:04:23,028 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1444891057, now seen corresponding path program 55 times [2020-12-23 07:04:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:23,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67923856] [2020-12-23 07:04:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:23,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67923856] [2020-12-23 07:04:23,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524184521] [2020-12-23 07:04:23,323 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:04:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:23,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:23,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:04:23,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289004124] [2020-12-23 07:04:23,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:04:23,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:23,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:04:23,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:04:23,467 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 18 states. [2020-12-23 07:04:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:24,106 INFO L93 Difference]: Finished difference Result 163 states and 197 transitions. [2020-12-23 07:04:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:04:24,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-12-23 07:04:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:24,108 INFO L225 Difference]: With dead ends: 163 [2020-12-23 07:04:24,108 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 07:04:24,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:04:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 07:04:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2020-12-23 07:04:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 07:04:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2020-12-23 07:04:24,122 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 32 [2020-12-23 07:04:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:24,122 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2020-12-23 07:04:24,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:04:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2020-12-23 07:04:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:04:24,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:24,123 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:24,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:24,336 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash 254889333, now seen corresponding path program 56 times [2020-12-23 07:04:24,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:24,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744995532] [2020-12-23 07:04:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:24,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744995532] [2020-12-23 07:04:24,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169272148] [2020-12-23 07:04:24,549 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:24,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:24,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:04:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:24,650 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:04:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:24,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:24,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:04:24,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968258665] [2020-12-23 07:04:24,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:04:24,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:04:24,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:04:24,680 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand 13 states. [2020-12-23 07:04:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:25,049 INFO L93 Difference]: Finished difference Result 364 states and 462 transitions. [2020-12-23 07:04:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:04:25,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-12-23 07:04:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:25,053 INFO L225 Difference]: With dead ends: 364 [2020-12-23 07:04:25,053 INFO L226 Difference]: Without dead ends: 351 [2020-12-23 07:04:25,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:04:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-23 07:04:25,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 138. [2020-12-23 07:04:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 07:04:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2020-12-23 07:04:25,069 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 33 [2020-12-23 07:04:25,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:25,069 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2020-12-23 07:04:25,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:04:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2020-12-23 07:04:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:04:25,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:25,070 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:25,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 07:04:25,284 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1677541379, now seen corresponding path program 57 times [2020-12-23 07:04:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:25,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387344716] [2020-12-23 07:04:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:25,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387344716] [2020-12-23 07:04:25,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232808229] [2020-12-23 07:04:25,637 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:26,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:04:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:04:26,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:26,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:26,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2020-12-23 07:04:26,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111110904] [2020-12-23 07:04:26,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:04:26,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:04:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:04:26,544 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand 26 states. [2020-12-23 07:04:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:27,347 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2020-12-23 07:04:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:04:27,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2020-12-23 07:04:27,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:27,349 INFO L225 Difference]: With dead ends: 167 [2020-12-23 07:04:27,349 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 07:04:27,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:04:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 07:04:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2020-12-23 07:04:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 07:04:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2020-12-23 07:04:27,363 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 33 [2020-12-23 07:04:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:27,363 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2020-12-23 07:04:27,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:04:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2020-12-23 07:04:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:04:27,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:27,363 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:27,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:27,567 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash -984689803, now seen corresponding path program 58 times [2020-12-23 07:04:27,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:27,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144736309] [2020-12-23 07:04:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:27,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144736309] [2020-12-23 07:04:27,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012625232] [2020-12-23 07:04:27,890 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:27,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:04:27,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:04:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:28,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:28,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:04:28,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720617793] [2020-12-23 07:04:28,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:04:28,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:04:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:04:28,077 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand 19 states. [2020-12-23 07:04:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:28,804 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2020-12-23 07:04:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:04:28,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-12-23 07:04:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:28,806 INFO L225 Difference]: With dead ends: 170 [2020-12-23 07:04:28,806 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 07:04:28,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:04:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 07:04:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-12-23 07:04:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 07:04:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2020-12-23 07:04:28,821 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 33 [2020-12-23 07:04:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:28,821 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2020-12-23 07:04:28,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:04:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2020-12-23 07:04:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:04:28,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:28,822 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:29,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 07:04:29,035 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash 45675011, now seen corresponding path program 59 times [2020-12-23 07:04:29,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:29,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196215410] [2020-12-23 07:04:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:04:29,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196215410] [2020-12-23 07:04:29,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811166189] [2020-12-23 07:04:29,346 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:31,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:04:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:04:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:04:31,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:31,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-12-23 07:04:31,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999095877] [2020-12-23 07:04:31,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:04:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:04:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:04:31,404 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand 21 states. [2020-12-23 07:04:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:32,038 INFO L93 Difference]: Finished difference Result 173 states and 209 transitions. [2020-12-23 07:04:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:04:32,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-12-23 07:04:32,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:32,040 INFO L225 Difference]: With dead ends: 173 [2020-12-23 07:04:32,041 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 07:04:32,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:04:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 07:04:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2020-12-23 07:04:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 07:04:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 178 transitions. [2020-12-23 07:04:32,053 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 178 transitions. Word has length 33 [2020-12-23 07:04:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:32,054 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 178 transitions. [2020-12-23 07:04:32,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:04:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 178 transitions. [2020-12-23 07:04:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:04:32,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:32,054 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:32,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 07:04:32,258 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:32,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1374660867, now seen corresponding path program 60 times [2020-12-23 07:04:32,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:32,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934680621] [2020-12-23 07:04:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:04:32,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934680621] [2020-12-23 07:04:32,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431829549] [2020-12-23 07:04:32,856 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:32,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:04:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:04:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-23 07:04:33,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:33,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2020-12-23 07:04:33,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643738325] [2020-12-23 07:04:33,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:04:33,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:33,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:04:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:04:33,247 INFO L87 Difference]: Start difference. First operand 141 states and 178 transitions. Second operand 31 states. [2020-12-23 07:04:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:36,598 INFO L93 Difference]: Finished difference Result 246 states and 334 transitions. [2020-12-23 07:04:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:04:36,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-23 07:04:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:36,601 INFO L225 Difference]: With dead ends: 246 [2020-12-23 07:04:36,601 INFO L226 Difference]: Without dead ends: 219 [2020-12-23 07:04:36,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=229, Invalid=4601, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:04:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-23 07:04:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2020-12-23 07:04:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 07:04:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2020-12-23 07:04:36,617 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 33 [2020-12-23 07:04:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:36,617 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2020-12-23 07:04:36,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:04:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2020-12-23 07:04:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:04:36,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:36,618 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:36,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 07:04:36,832 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2116421967, now seen corresponding path program 61 times [2020-12-23 07:04:36,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:36,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616247622] [2020-12-23 07:04:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:37,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616247622] [2020-12-23 07:04:37,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492159200] [2020-12-23 07:04:37,213 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:37,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:04:37,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 07:04:37,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:37,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2020-12-23 07:04:37,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141378650] [2020-12-23 07:04:37,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:04:37,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:37,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:04:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:04:37,719 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 29 states. [2020-12-23 07:04:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:38,055 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2020-12-23 07:04:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:04:38,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2020-12-23 07:04:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:38,056 INFO L225 Difference]: With dead ends: 164 [2020-12-23 07:04:38,057 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 07:04:38,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:04:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 07:04:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-12-23 07:04:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 07:04:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-12-23 07:04:38,073 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 34 [2020-12-23 07:04:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:38,073 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-12-23 07:04:38,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:04:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-12-23 07:04:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:04:38,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:38,073 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:38,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:38,274 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1463271743, now seen corresponding path program 62 times [2020-12-23 07:04:38,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:38,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443373910] [2020-12-23 07:04:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:38,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443373910] [2020-12-23 07:04:38,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711194939] [2020-12-23 07:04:38,651 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:38,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:38,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:04:38,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:39,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:39,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2020-12-23 07:04:39,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266850929] [2020-12-23 07:04:39,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:04:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:04:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:04:39,092 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 28 states. [2020-12-23 07:04:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:39,674 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2020-12-23 07:04:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:04:39,675 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 34 [2020-12-23 07:04:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:39,676 INFO L225 Difference]: With dead ends: 169 [2020-12-23 07:04:39,676 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 07:04:39,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:04:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 07:04:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2020-12-23 07:04:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 07:04:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 177 transitions. [2020-12-23 07:04:39,686 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 177 transitions. Word has length 34 [2020-12-23 07:04:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:39,687 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 177 transitions. [2020-12-23 07:04:39,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:04:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 177 transitions. [2020-12-23 07:04:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:04:39,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:39,687 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:39,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:39,895 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash 396647183, now seen corresponding path program 63 times [2020-12-23 07:04:39,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:39,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108555468] [2020-12-23 07:04:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108555468] [2020-12-23 07:04:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088374334] [2020-12-23 07:04:40,257 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:40,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:04:40,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:40,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:04:40,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:40,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:40,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 07:04:40,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853307112] [2020-12-23 07:04:40,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:04:40,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:04:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:04:40,572 INFO L87 Difference]: Start difference. First operand 141 states and 177 transitions. Second operand 20 states. [2020-12-23 07:04:41,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:41,306 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2020-12-23 07:04:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:04:41,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2020-12-23 07:04:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:41,308 INFO L225 Difference]: With dead ends: 172 [2020-12-23 07:04:41,308 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 07:04:41,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:04:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 07:04:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2020-12-23 07:04:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 07:04:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2020-12-23 07:04:41,320 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 34 [2020-12-23 07:04:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:41,320 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2020-12-23 07:04:41,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:04:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2020-12-23 07:04:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:04:41,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:41,321 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:41,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:41,521 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:41,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2123747457, now seen corresponding path program 64 times [2020-12-23 07:04:41,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:41,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520802888] [2020-12-23 07:04:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:04:41,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520802888] [2020-12-23 07:04:41,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584577587] [2020-12-23 07:04:41,790 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:41,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:04:41,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:04:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:04:41,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:41,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:04:41,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264773987] [2020-12-23 07:04:41,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:04:41,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:04:41,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:04:41,938 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand 19 states. [2020-12-23 07:04:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:42,575 INFO L93 Difference]: Finished difference Result 175 states and 210 transitions. [2020-12-23 07:04:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:04:42,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-12-23 07:04:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:42,578 INFO L225 Difference]: With dead ends: 175 [2020-12-23 07:04:42,578 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 07:04:42,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:04:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 07:04:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2020-12-23 07:04:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 07:04:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2020-12-23 07:04:42,590 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 34 [2020-12-23 07:04:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:42,590 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2020-12-23 07:04:42,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:04:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2020-12-23 07:04:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:04:42,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:42,591 INFO L422 BasicCegarLoop]: trace histogram [20, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:42,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-12-23 07:04:42,806 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1629205231, now seen corresponding path program 65 times [2020-12-23 07:04:42,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:42,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444311383] [2020-12-23 07:04:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:04:43,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444311383] [2020-12-23 07:04:43,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882657983] [2020-12-23 07:04:43,506 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:46,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 07:04:46,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 07:04:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:04:46,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:46,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 32 [2020-12-23 07:04:46,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229453927] [2020-12-23 07:04:46,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:04:46,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:46,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:04:46,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:04:46,422 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand 32 states. [2020-12-23 07:04:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:48,093 INFO L93 Difference]: Finished difference Result 224 states and 307 transitions. [2020-12-23 07:04:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:04:48,094 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-23 07:04:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:48,096 INFO L225 Difference]: With dead ends: 224 [2020-12-23 07:04:48,096 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 07:04:48,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:04:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 07:04:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 151. [2020-12-23 07:04:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 07:04:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2020-12-23 07:04:48,112 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 34 [2020-12-23 07:04:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:48,113 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2020-12-23 07:04:48,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:04:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2020-12-23 07:04:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:04:48,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:48,113 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:48,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:48,317 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:48,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:48,318 INFO L82 PathProgramCache]: Analyzing trace with hash -884119677, now seen corresponding path program 66 times [2020-12-23 07:04:48,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:48,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027201054] [2020-12-23 07:04:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:48,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027201054] [2020-12-23 07:04:48,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479481258] [2020-12-23 07:04:48,753 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:48,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 07:04:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 07:04:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:49,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:49,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2020-12-23 07:04:49,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166615055] [2020-12-23 07:04:49,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:04:49,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:49,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:04:49,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:04:49,403 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 30 states. [2020-12-23 07:04:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:50,039 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2020-12-23 07:04:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:04:50,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2020-12-23 07:04:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:50,040 INFO L225 Difference]: With dead ends: 180 [2020-12-23 07:04:50,041 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 07:04:50,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:04:50,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 07:04:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2020-12-23 07:04:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 07:04:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 190 transitions. [2020-12-23 07:04:50,057 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 190 transitions. Word has length 35 [2020-12-23 07:04:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:50,057 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 190 transitions. [2020-12-23 07:04:50,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:04:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 190 transitions. [2020-12-23 07:04:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:04:50,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:50,058 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:50,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:50,273 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash 268420789, now seen corresponding path program 67 times [2020-12-23 07:04:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:50,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423003534] [2020-12-23 07:04:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:50,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423003534] [2020-12-23 07:04:50,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705276654] [2020-12-23 07:04:50,643 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:50,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:04:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:04:50,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:50,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:04:50,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587913121] [2020-12-23 07:04:50,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:04:50,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:04:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:04:50,787 INFO L87 Difference]: Start difference. First operand 152 states and 190 transitions. Second operand 21 states. [2020-12-23 07:04:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:51,653 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2020-12-23 07:04:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:04:51,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-12-23 07:04:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:51,655 INFO L225 Difference]: With dead ends: 183 [2020-12-23 07:04:51,655 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 07:04:51,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:04:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 07:04:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2020-12-23 07:04:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 07:04:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 191 transitions. [2020-12-23 07:04:51,667 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 191 transitions. Word has length 35 [2020-12-23 07:04:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:51,667 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 191 transitions. [2020-12-23 07:04:51,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:04:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2020-12-23 07:04:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:04:51,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:51,668 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:51,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:51,868 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash -656367229, now seen corresponding path program 68 times [2020-12-23 07:04:51,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:51,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213120951] [2020-12-23 07:04:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:04:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213120951] [2020-12-23 07:04:52,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606485695] [2020-12-23 07:04:52,243 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:52,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:04:52,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:52,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:04:52,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:04:52,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:52,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 07:04:52,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647000388] [2020-12-23 07:04:52,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:04:52,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:04:52,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:04:52,391 INFO L87 Difference]: Start difference. First operand 153 states and 191 transitions. Second operand 20 states. [2020-12-23 07:04:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:53,164 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2020-12-23 07:04:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:04:53,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-12-23 07:04:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:53,166 INFO L225 Difference]: With dead ends: 186 [2020-12-23 07:04:53,166 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 07:04:53,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:04:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 07:04:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2020-12-23 07:04:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 07:04:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 192 transitions. [2020-12-23 07:04:53,180 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 192 transitions. Word has length 35 [2020-12-23 07:04:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:53,180 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 192 transitions. [2020-12-23 07:04:53,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:04:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 192 transitions. [2020-12-23 07:04:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:04:53,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:53,181 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:53,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-23 07:04:53,381 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:53,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1431785428, now seen corresponding path program 69 times [2020-12-23 07:04:53,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:53,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032189184] [2020-12-23 07:04:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:04:54,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032189184] [2020-12-23 07:04:54,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407032516] [2020-12-23 07:04:54,092 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:54,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:04:54,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:04:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-23 07:04:54,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:54,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8] total 34 [2020-12-23 07:04:54,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605681743] [2020-12-23 07:04:54,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:04:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:04:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:04:54,499 INFO L87 Difference]: Start difference. First operand 154 states and 192 transitions. Second operand 34 states. [2020-12-23 07:04:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:59,119 INFO L93 Difference]: Finished difference Result 255 states and 350 transitions. [2020-12-23 07:04:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 07:04:59,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 35 [2020-12-23 07:04:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:59,122 INFO L225 Difference]: With dead ends: 255 [2020-12-23 07:04:59,122 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 07:04:59,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=786, Invalid=6354, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:04:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 07:04:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 166. [2020-12-23 07:04:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 07:04:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2020-12-23 07:04:59,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 35 [2020-12-23 07:04:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:59,141 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2020-12-23 07:04:59,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:04:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2020-12-23 07:04:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:04:59,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:59,142 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:59,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:59,349 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash -638809665, now seen corresponding path program 70 times [2020-12-23 07:04:59,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:59,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812588306] [2020-12-23 07:04:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:59,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812588306] [2020-12-23 07:04:59,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516976361] [2020-12-23 07:04:59,614 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:59,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:04:59,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:04:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:04:59,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:04:59,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:04:59,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:04:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:04:59,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:04:59,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:04:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984107832] [2020-12-23 07:04:59,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:04:59,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:04:59,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:04:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:04:59,766 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand 14 states. [2020-12-23 07:05:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:00,221 INFO L93 Difference]: Finished difference Result 450 states and 567 transitions. [2020-12-23 07:05:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:05:00,221 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-23 07:05:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:00,224 INFO L225 Difference]: With dead ends: 450 [2020-12-23 07:05:00,224 INFO L226 Difference]: Without dead ends: 436 [2020-12-23 07:05:00,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:05:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-23 07:05:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 172. [2020-12-23 07:05:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 07:05:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2020-12-23 07:05:00,242 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 36 [2020-12-23 07:05:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:00,242 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2020-12-23 07:05:00,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:05:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2020-12-23 07:05:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:05:00,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:00,243 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:00,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:00,457 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:00,457 INFO L82 PathProgramCache]: Analyzing trace with hash 588369871, now seen corresponding path program 71 times [2020-12-23 07:05:00,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:00,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438862396] [2020-12-23 07:05:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:05:00,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438862396] [2020-12-23 07:05:00,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833366301] [2020-12-23 07:05:00,906 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:03,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 07:05:03,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:05:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:05:03,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:03,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:05:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675331645] [2020-12-23 07:05:03,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:05:03,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:05:03,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:05:03,355 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand 22 states. [2020-12-23 07:05:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:04,375 INFO L93 Difference]: Finished difference Result 203 states and 243 transitions. [2020-12-23 07:05:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:05:04,377 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-12-23 07:05:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:04,378 INFO L225 Difference]: With dead ends: 203 [2020-12-23 07:05:04,378 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 07:05:04,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:05:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 07:05:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 173. [2020-12-23 07:05:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 07:05:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 214 transitions. [2020-12-23 07:05:04,399 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 214 transitions. Word has length 36 [2020-12-23 07:05:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:04,399 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 214 transitions. [2020-12-23 07:05:04,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:05:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 214 transitions. [2020-12-23 07:05:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:05:04,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:04,400 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:04,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 07:05:04,604 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1882746879, now seen corresponding path program 72 times [2020-12-23 07:05:04,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:04,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149732104] [2020-12-23 07:05:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:05,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149732104] [2020-12-23 07:05:05,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466132704] [2020-12-23 07:05:05,018 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:05,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:05:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:05:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:05,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:05,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:05:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957727432] [2020-12-23 07:05:05,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:05:05,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:05:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:05:05,472 INFO L87 Difference]: Start difference. First operand 173 states and 214 transitions. Second operand 21 states. [2020-12-23 07:05:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:06,509 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2020-12-23 07:05:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:05:06,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-12-23 07:05:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:06,511 INFO L225 Difference]: With dead ends: 206 [2020-12-23 07:05:06,511 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 07:05:06,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:05:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 07:05:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 174. [2020-12-23 07:05:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 07:05:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2020-12-23 07:05:06,524 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 36 [2020-12-23 07:05:06,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:06,524 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2020-12-23 07:05:06,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:05:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2020-12-23 07:05:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:05:06,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:06,525 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:06,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:06,729 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:06,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1059924367, now seen corresponding path program 73 times [2020-12-23 07:05:06,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:06,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45127369] [2020-12-23 07:05:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:07,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45127369] [2020-12-23 07:05:07,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509922019] [2020-12-23 07:05:07,108 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:07,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:05:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:07,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:07,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 07:05:07,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407301157] [2020-12-23 07:05:07,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:05:07,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:05:07,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:05:07,261 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand 20 states. [2020-12-23 07:05:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:08,119 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2020-12-23 07:05:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:05:08,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-12-23 07:05:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:08,121 INFO L225 Difference]: With dead ends: 209 [2020-12-23 07:05:08,121 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 07:05:08,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:05:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 07:05:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2020-12-23 07:05:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 07:05:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 216 transitions. [2020-12-23 07:05:08,135 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 216 transitions. Word has length 36 [2020-12-23 07:05:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:08,135 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 216 transitions. [2020-12-23 07:05:08,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:05:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 216 transitions. [2020-12-23 07:05:08,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:05:08,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:08,135 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:08,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:08,336 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1624133885, now seen corresponding path program 74 times [2020-12-23 07:05:08,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:08,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632334109] [2020-12-23 07:05:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:05:08,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632334109] [2020-12-23 07:05:08,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577351661] [2020-12-23 07:05:08,834 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:08,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:05:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 07:05:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 07:05:09,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:09,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2020-12-23 07:05:09,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4083500] [2020-12-23 07:05:09,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 07:05:09,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 07:05:09,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:05:09,454 INFO L87 Difference]: Start difference. First operand 175 states and 216 transitions. Second operand 32 states. [2020-12-23 07:05:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:09,895 INFO L93 Difference]: Finished difference Result 189 states and 229 transitions. [2020-12-23 07:05:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:05:09,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2020-12-23 07:05:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:09,897 INFO L225 Difference]: With dead ends: 189 [2020-12-23 07:05:09,897 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 07:05:09,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:05:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 07:05:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-12-23 07:05:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 07:05:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 202 transitions. [2020-12-23 07:05:09,907 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 202 transitions. Word has length 37 [2020-12-23 07:05:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:09,908 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 202 transitions. [2020-12-23 07:05:09,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 07:05:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 202 transitions. [2020-12-23 07:05:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:05:09,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:09,909 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:10,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:10,110 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1916856821, now seen corresponding path program 75 times [2020-12-23 07:05:10,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:10,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897505615] [2020-12-23 07:05:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:05:10,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897505615] [2020-12-23 07:05:10,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466781722] [2020-12-23 07:05:10,550 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:11,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:05:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:11,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:05:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:05:11,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:11,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2020-12-23 07:05:11,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509622688] [2020-12-23 07:05:11,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:05:11,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:11,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:05:11,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:05:11,557 INFO L87 Difference]: Start difference. First operand 163 states and 202 transitions. Second operand 31 states. [2020-12-23 07:05:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:12,288 INFO L93 Difference]: Finished difference Result 194 states and 232 transitions. [2020-12-23 07:05:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:05:12,289 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-23 07:05:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:12,290 INFO L225 Difference]: With dead ends: 194 [2020-12-23 07:05:12,290 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 07:05:12,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:05:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 07:05:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2020-12-23 07:05:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:05:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2020-12-23 07:05:12,304 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 37 [2020-12-23 07:05:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:12,304 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2020-12-23 07:05:12,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:05:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2020-12-23 07:05:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:05:12,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:12,305 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:12,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:12,509 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1009094397, now seen corresponding path program 76 times [2020-12-23 07:05:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:12,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408803909] [2020-12-23 07:05:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:12,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408803909] [2020-12-23 07:05:12,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012233041] [2020-12-23 07:05:12,992 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:13,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:13,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:13,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:05:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:13,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:13,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:05:13,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758464054] [2020-12-23 07:05:13,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:05:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:05:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:05:13,154 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 22 states. [2020-12-23 07:05:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:14,214 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2020-12-23 07:05:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:05:14,215 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-12-23 07:05:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:14,216 INFO L225 Difference]: With dead ends: 197 [2020-12-23 07:05:14,216 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 07:05:14,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:05:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 07:05:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 165. [2020-12-23 07:05:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 07:05:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2020-12-23 07:05:14,234 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 37 [2020-12-23 07:05:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:14,234 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2020-12-23 07:05:14,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:05:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2020-12-23 07:05:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:05:14,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:14,235 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:14,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:14,450 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash 387248117, now seen corresponding path program 77 times [2020-12-23 07:05:14,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:14,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758889747] [2020-12-23 07:05:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:14,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758889747] [2020-12-23 07:05:14,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620576127] [2020-12-23 07:05:14,845 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:19,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:05:19,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:19,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 07:05:19,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:20,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:20,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 25 [2020-12-23 07:05:20,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866705468] [2020-12-23 07:05:20,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:05:20,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:20,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:05:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:05:20,159 INFO L87 Difference]: Start difference. First operand 165 states and 204 transitions. Second operand 25 states. [2020-12-23 07:05:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:21,224 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-23 07:05:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:05:21,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2020-12-23 07:05:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:21,227 INFO L225 Difference]: With dead ends: 200 [2020-12-23 07:05:21,227 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 07:05:21,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:05:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 07:05:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2020-12-23 07:05:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 07:05:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2020-12-23 07:05:21,246 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 37 [2020-12-23 07:05:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:21,246 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2020-12-23 07:05:21,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:05:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2020-12-23 07:05:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:05:21,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:21,247 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:21,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:21,452 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash 150279311, now seen corresponding path program 78 times [2020-12-23 07:05:21,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:21,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050007739] [2020-12-23 07:05:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:05:21,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050007739] [2020-12-23 07:05:21,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732319981] [2020-12-23 07:05:21,980 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:22,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 07:05:22,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:05:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:05:23,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:23,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2020-12-23 07:05:23,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185526118] [2020-12-23 07:05:23,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:05:23,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:05:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:05:23,052 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand 33 states. [2020-12-23 07:05:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:23,805 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2020-12-23 07:05:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:05:23,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2020-12-23 07:05:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:23,807 INFO L225 Difference]: With dead ends: 197 [2020-12-23 07:05:23,807 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 07:05:23,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:05:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 07:05:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 167. [2020-12-23 07:05:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 07:05:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2020-12-23 07:05:23,820 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 38 [2020-12-23 07:05:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:23,820 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2020-12-23 07:05:23,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:05:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2020-12-23 07:05:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:05:23,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:23,821 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:24,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-12-23 07:05:24,025 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:24,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:24,026 INFO L82 PathProgramCache]: Analyzing trace with hash -461860737, now seen corresponding path program 79 times [2020-12-23 07:05:24,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:24,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537164618] [2020-12-23 07:05:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:24,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537164618] [2020-12-23 07:05:24,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707439941] [2020-12-23 07:05:24,509 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:05:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:24,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:24,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 07:05:24,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297807638] [2020-12-23 07:05:24,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:05:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:24,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:05:24,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:05:24,677 INFO L87 Difference]: Start difference. First operand 167 states and 206 transitions. Second operand 23 states. [2020-12-23 07:05:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:25,817 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-23 07:05:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:05:25,818 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-12-23 07:05:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:25,819 INFO L225 Difference]: With dead ends: 200 [2020-12-23 07:05:25,819 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 07:05:25,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:05:25,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 07:05:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2020-12-23 07:05:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 07:05:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 207 transitions. [2020-12-23 07:05:25,832 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 207 transitions. Word has length 38 [2020-12-23 07:05:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:25,832 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 207 transitions. [2020-12-23 07:05:25,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:05:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 207 transitions. [2020-12-23 07:05:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:05:25,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:25,833 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:26,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:26,033 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1009120847, now seen corresponding path program 80 times [2020-12-23 07:05:26,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:26,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871450143] [2020-12-23 07:05:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:26,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871450143] [2020-12-23 07:05:26,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532489588] [2020-12-23 07:05:26,477 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:26,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:05:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:05:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:26,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:26,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:05:26,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496979844] [2020-12-23 07:05:26,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:05:26,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:26,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:05:26,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:05:26,638 INFO L87 Difference]: Start difference. First operand 168 states and 207 transitions. Second operand 22 states. [2020-12-23 07:05:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:27,778 INFO L93 Difference]: Finished difference Result 203 states and 241 transitions. [2020-12-23 07:05:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:05:27,782 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-12-23 07:05:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:27,784 INFO L225 Difference]: With dead ends: 203 [2020-12-23 07:05:27,784 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 07:05:27,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:05:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 07:05:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 169. [2020-12-23 07:05:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 07:05:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2020-12-23 07:05:27,798 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 38 [2020-12-23 07:05:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:27,798 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2020-12-23 07:05:27,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:05:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2020-12-23 07:05:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:05:27,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:27,799 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:28,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-23 07:05:28,001 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:28,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1271426751, now seen corresponding path program 81 times [2020-12-23 07:05:28,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:28,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156808975] [2020-12-23 07:05:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:05:28,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156808975] [2020-12-23 07:05:28,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755370450] [2020-12-23 07:05:28,407 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:28,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:05:28,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:28,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:05:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-23 07:05:29,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:29,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-12-23 07:05:29,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480731658] [2020-12-23 07:05:29,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:05:29,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:05:29,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:05:29,199 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand 28 states. [2020-12-23 07:05:31,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:31,429 INFO L93 Difference]: Finished difference Result 242 states and 287 transitions. [2020-12-23 07:05:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:05:31,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 38 [2020-12-23 07:05:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:31,431 INFO L225 Difference]: With dead ends: 242 [2020-12-23 07:05:31,431 INFO L226 Difference]: Without dead ends: 193 [2020-12-23 07:05:31,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=156, Invalid=2100, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:05:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-23 07:05:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 175. [2020-12-23 07:05:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 07:05:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2020-12-23 07:05:31,454 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 38 [2020-12-23 07:05:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:31,454 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2020-12-23 07:05:31,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:05:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2020-12-23 07:05:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:05:31,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:31,455 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:31,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-23 07:05:31,655 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -415208226, now seen corresponding path program 82 times [2020-12-23 07:05:31,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:31,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465180571] [2020-12-23 07:05:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:05:32,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465180571] [2020-12-23 07:05:32,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387897576] [2020-12-23 07:05:32,509 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:32,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:05:32,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 07:05:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:05:32,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:32,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:05:32,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944472013] [2020-12-23 07:05:32,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:05:32,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:32,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:05:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:05:32,688 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand 31 states. [2020-12-23 07:05:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:34,828 INFO L93 Difference]: Finished difference Result 265 states and 351 transitions. [2020-12-23 07:05:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:05:34,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2020-12-23 07:05:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:34,831 INFO L225 Difference]: With dead ends: 265 [2020-12-23 07:05:34,831 INFO L226 Difference]: Without dead ends: 255 [2020-12-23 07:05:34,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=139, Invalid=1931, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:05:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-23 07:05:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 184. [2020-12-23 07:05:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 07:05:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 224 transitions. [2020-12-23 07:05:34,847 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 224 transitions. Word has length 38 [2020-12-23 07:05:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:34,847 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 224 transitions. [2020-12-23 07:05:34,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:05:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 224 transitions. [2020-12-23 07:05:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:05:34,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:34,848 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:35,057 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1220951349, now seen corresponding path program 83 times [2020-12-23 07:05:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:35,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643277436] [2020-12-23 07:05:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:05:35,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643277436] [2020-12-23 07:05:35,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299062889] [2020-12-23 07:05:35,361 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:40,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 07:05:40,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:40,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-23 07:05:40,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:42,065 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:05:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:05:42,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:42,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 36] total 41 [2020-12-23 07:05:42,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507252547] [2020-12-23 07:05:42,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:05:42,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:42,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:05:42,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:05:42,123 INFO L87 Difference]: Start difference. First operand 184 states and 224 transitions. Second operand 41 states. [2020-12-23 07:05:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:44,158 INFO L93 Difference]: Finished difference Result 496 states and 615 transitions. [2020-12-23 07:05:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:05:44,158 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 39 [2020-12-23 07:05:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:44,160 INFO L225 Difference]: With dead ends: 496 [2020-12-23 07:05:44,160 INFO L226 Difference]: Without dead ends: 479 [2020-12-23 07:05:44,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=152, Invalid=2298, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 07:05:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-12-23 07:05:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 190. [2020-12-23 07:05:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 07:05:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2020-12-23 07:05:44,188 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 39 [2020-12-23 07:05:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:44,188 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2020-12-23 07:05:44,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:05:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2020-12-23 07:05:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:05:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:44,190 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:44,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:44,391 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:44,391 INFO L82 PathProgramCache]: Analyzing trace with hash -677486461, now seen corresponding path program 84 times [2020-12-23 07:05:44,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:44,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261591715] [2020-12-23 07:05:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:44,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261591715] [2020-12-23 07:05:44,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102301105] [2020-12-23 07:05:44,939 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:45,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:05:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:05:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:05:45,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:45,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:05:45,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622016038] [2020-12-23 07:05:45,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:05:45,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:05:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:05:45,483 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand 24 states. [2020-12-23 07:05:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:46,799 INFO L93 Difference]: Finished difference Result 223 states and 264 transitions. [2020-12-23 07:05:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:05:46,801 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2020-12-23 07:05:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:46,802 INFO L225 Difference]: With dead ends: 223 [2020-12-23 07:05:46,802 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 07:05:46,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:05:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 07:05:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2020-12-23 07:05:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 07:05:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2020-12-23 07:05:46,821 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 39 [2020-12-23 07:05:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:46,821 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2020-12-23 07:05:46,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:05:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2020-12-23 07:05:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:05:46,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:46,822 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:47,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:47,037 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1187661003, now seen corresponding path program 85 times [2020-12-23 07:05:47,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:47,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469472953] [2020-12-23 07:05:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:47,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469472953] [2020-12-23 07:05:47,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480327423] [2020-12-23 07:05:47,549 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:47,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:05:47,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:05:47,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:47,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 07:05:47,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268532493] [2020-12-23 07:05:47,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:05:47,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:47,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:05:47,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:05:47,713 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand 23 states. [2020-12-23 07:05:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:49,067 INFO L93 Difference]: Finished difference Result 226 states and 267 transitions. [2020-12-23 07:05:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:05:49,068 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-12-23 07:05:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:49,069 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:05:49,069 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:05:49,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:05:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:05:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2020-12-23 07:05:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 07:05:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 234 transitions. [2020-12-23 07:05:49,086 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 234 transitions. Word has length 39 [2020-12-23 07:05:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:49,086 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 234 transitions. [2020-12-23 07:05:49,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:05:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 234 transitions. [2020-12-23 07:05:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:05:49,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:49,086 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:49,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-12-23 07:05:49,287 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash -850716029, now seen corresponding path program 86 times [2020-12-23 07:05:49,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:49,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101784298] [2020-12-23 07:05:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:05:49,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101784298] [2020-12-23 07:05:49,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36101870] [2020-12-23 07:05:49,764 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:49,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:05:49,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:49,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:05:49,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:05:49,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:49,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:05:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833913275] [2020-12-23 07:05:49,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:05:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:05:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:05:49,927 INFO L87 Difference]: Start difference. First operand 192 states and 234 transitions. Second operand 22 states. [2020-12-23 07:05:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:05:51,036 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2020-12-23 07:05:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:05:51,037 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-12-23 07:05:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:05:51,039 INFO L225 Difference]: With dead ends: 229 [2020-12-23 07:05:51,039 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 07:05:51,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:05:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 07:05:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 193. [2020-12-23 07:05:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 07:05:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2020-12-23 07:05:51,062 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 39 [2020-12-23 07:05:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:05:51,063 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2020-12-23 07:05:51,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:05:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2020-12-23 07:05:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:05:51,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:05:51,063 INFO L422 BasicCegarLoop]: trace histogram [23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:05:51,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:51,264 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:05:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:05:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash -387379389, now seen corresponding path program 87 times [2020-12-23 07:05:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:05:51,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085387296] [2020-12-23 07:05:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:05:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:05:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:05:52,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085387296] [2020-12-23 07:05:52,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153233264] [2020-12-23 07:05:52,191 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:05:52,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:05:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:05:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:05:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:05:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-23 07:05:52,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:05:52,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2020-12-23 07:05:52,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477150128] [2020-12-23 07:05:52,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:05:52,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:05:52,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:05:52,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:05:52,818 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand 39 states. [2020-12-23 07:06:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:00,691 INFO L93 Difference]: Finished difference Result 322 states and 432 transitions. [2020-12-23 07:06:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-12-23 07:06:00,692 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2020-12-23 07:06:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:00,694 INFO L225 Difference]: With dead ends: 322 [2020-12-23 07:06:00,694 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 07:06:00,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1377, Invalid=11505, Unknown=0, NotChecked=0, Total=12882 [2020-12-23 07:06:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 07:06:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 206. [2020-12-23 07:06:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 07:06:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 249 transitions. [2020-12-23 07:06:00,713 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 249 transitions. Word has length 39 [2020-12-23 07:06:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:00,714 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 249 transitions. [2020-12-23 07:06:00,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:06:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 249 transitions. [2020-12-23 07:06:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:06:00,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:00,714 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:00,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-12-23 07:06:00,916 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash 52046159, now seen corresponding path program 88 times [2020-12-23 07:06:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:00,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423782757] [2020-12-23 07:06:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:06:01,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423782757] [2020-12-23 07:06:01,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057546630] [2020-12-23 07:06:01,481 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:01,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:06:01,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 07:06:01,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-23 07:06:02,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:02,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2020-12-23 07:06:02,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027619537] [2020-12-23 07:06:02,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:06:02,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:02,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:06:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:06:02,224 INFO L87 Difference]: Start difference. First operand 206 states and 249 transitions. Second operand 35 states. [2020-12-23 07:06:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:02,713 INFO L93 Difference]: Finished difference Result 221 states and 263 transitions. [2020-12-23 07:06:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:06:02,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 40 [2020-12-23 07:06:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:02,715 INFO L225 Difference]: With dead ends: 221 [2020-12-23 07:06:02,715 INFO L226 Difference]: Without dead ends: 193 [2020-12-23 07:06:02,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:06:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-23 07:06:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-12-23 07:06:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 07:06:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 234 transitions. [2020-12-23 07:06:02,731 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 234 transitions. Word has length 40 [2020-12-23 07:06:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:02,731 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 234 transitions. [2020-12-23 07:06:02,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:06:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 234 transitions. [2020-12-23 07:06:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:06:02,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:02,732 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:02,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:02,933 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:02,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1228050687, now seen corresponding path program 89 times [2020-12-23 07:06:02,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:02,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040477566] [2020-12-23 07:06:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040477566] [2020-12-23 07:06:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864320607] [2020-12-23 07:06:03,533 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:08,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:06:08,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:08,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:06:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:09,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:09,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2020-12-23 07:06:09,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421164631] [2020-12-23 07:06:09,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:06:09,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:06:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:06:09,173 INFO L87 Difference]: Start difference. First operand 193 states and 234 transitions. Second operand 34 states. [2020-12-23 07:06:10,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:10,004 INFO L93 Difference]: Finished difference Result 226 states and 266 transitions. [2020-12-23 07:06:10,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:06:10,005 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 40 [2020-12-23 07:06:10,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:10,006 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:06:10,006 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 07:06:10,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:06:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 07:06:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2020-12-23 07:06:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 07:06:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2020-12-23 07:06:10,021 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 40 [2020-12-23 07:06:10,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:10,021 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2020-12-23 07:06:10,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:06:10,021 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2020-12-23 07:06:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:06:10,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:10,022 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:10,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:10,226 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:10,227 INFO L82 PathProgramCache]: Analyzing trace with hash -568421617, now seen corresponding path program 90 times [2020-12-23 07:06:10,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:10,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693890641] [2020-12-23 07:06:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:06:10,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693890641] [2020-12-23 07:06:10,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47549467] [2020-12-23 07:06:10,777 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:11,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:06:11,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:06:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:06:11,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:11,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-12-23 07:06:11,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842697293] [2020-12-23 07:06:11,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:06:11,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:11,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:06:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:06:11,410 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand 25 states. [2020-12-23 07:06:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:12,636 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2020-12-23 07:06:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:06:12,637 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2020-12-23 07:06:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:12,638 INFO L225 Difference]: With dead ends: 229 [2020-12-23 07:06:12,638 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 07:06:12,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:06:12,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 07:06:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2020-12-23 07:06:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 07:06:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2020-12-23 07:06:12,654 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 40 [2020-12-23 07:06:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:12,654 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2020-12-23 07:06:12,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:06:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2020-12-23 07:06:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:06:12,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:12,655 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:12,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-12-23 07:06:12,855 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2082334527, now seen corresponding path program 91 times [2020-12-23 07:06:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:12,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703484456] [2020-12-23 07:06:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:06:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703484456] [2020-12-23 07:06:13,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384534683] [2020-12-23 07:06:13,364 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:13,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:06:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:06:13,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:13,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 07:06:13,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421358991] [2020-12-23 07:06:13,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 07:06:13,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 07:06:13,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:06:13,540 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand 23 states. [2020-12-23 07:06:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:14,865 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2020-12-23 07:06:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:06:14,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2020-12-23 07:06:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:14,867 INFO L225 Difference]: With dead ends: 232 [2020-12-23 07:06:14,867 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 07:06:14,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:06:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 07:06:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2020-12-23 07:06:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 07:06:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2020-12-23 07:06:14,893 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 40 [2020-12-23 07:06:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:14,893 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2020-12-23 07:06:14,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 07:06:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2020-12-23 07:06:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:06:14,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:14,894 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:15,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-23 07:06:15,103 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash 170160131, now seen corresponding path program 92 times [2020-12-23 07:06:15,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:15,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010404247] [2020-12-23 07:06:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:15,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010404247] [2020-12-23 07:06:15,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084039389] [2020-12-23 07:06:15,741 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:15,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:06:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:15,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 07:06:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:16,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:16,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2020-12-23 07:06:16,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821306423] [2020-12-23 07:06:16,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:06:16,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:06:16,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:06:16,475 INFO L87 Difference]: Start difference. First operand 196 states and 237 transitions. Second operand 36 states. [2020-12-23 07:06:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:17,231 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2020-12-23 07:06:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:06:17,232 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-12-23 07:06:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:17,234 INFO L225 Difference]: With dead ends: 229 [2020-12-23 07:06:17,234 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 07:06:17,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:06:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 07:06:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 197. [2020-12-23 07:06:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 07:06:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 238 transitions. [2020-12-23 07:06:17,255 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 238 transitions. Word has length 41 [2020-12-23 07:06:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:17,255 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 238 transitions. [2020-12-23 07:06:17,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:06:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 238 transitions. [2020-12-23 07:06:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:06:17,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:17,256 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:17,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:17,457 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1448130165, now seen corresponding path program 93 times [2020-12-23 07:06:17,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:17,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221109249] [2020-12-23 07:06:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:06:18,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221109249] [2020-12-23 07:06:18,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347508394] [2020-12-23 07:06:18,050 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:18,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:06:18,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 07:06:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:06:19,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 36 [2020-12-23 07:06:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745450516] [2020-12-23 07:06:19,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:06:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:06:19,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:06:19,778 INFO L87 Difference]: Start difference. First operand 197 states and 238 transitions. Second operand 36 states. [2020-12-23 07:06:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:21,460 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2020-12-23 07:06:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:06:21,461 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-12-23 07:06:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:21,462 INFO L225 Difference]: With dead ends: 232 [2020-12-23 07:06:21,462 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 07:06:21,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:06:21,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 07:06:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 198. [2020-12-23 07:06:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:06:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2020-12-23 07:06:21,496 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 41 [2020-12-23 07:06:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:21,496 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2020-12-23 07:06:21,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:06:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2020-12-23 07:06:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:06:21,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:21,497 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:21,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-23 07:06:21,701 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:21,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1482378749, now seen corresponding path program 94 times [2020-12-23 07:06:21,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:21,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887127021] [2020-12-23 07:06:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:06:22,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887127021] [2020-12-23 07:06:22,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121377429] [2020-12-23 07:06:22,236 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:22,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:06:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:22,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:06:22,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:06:22,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:22,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:06:22,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566649756] [2020-12-23 07:06:22,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:06:22,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:06:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:06:22,413 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand 24 states. [2020-12-23 07:06:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:23,907 INFO L93 Difference]: Finished difference Result 235 states and 275 transitions. [2020-12-23 07:06:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:06:23,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2020-12-23 07:06:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:23,909 INFO L225 Difference]: With dead ends: 235 [2020-12-23 07:06:23,910 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 07:06:23,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=1580, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:06:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 07:06:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 199. [2020-12-23 07:06:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 07:06:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2020-12-23 07:06:23,926 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 41 [2020-12-23 07:06:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:23,926 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2020-12-23 07:06:23,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:06:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2020-12-23 07:06:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:06:23,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:23,927 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:24,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-23 07:06:24,142 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:24,142 INFO L82 PathProgramCache]: Analyzing trace with hash 372980853, now seen corresponding path program 95 times [2020-12-23 07:06:24,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:24,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16441891] [2020-12-23 07:06:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 07:06:24,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16441891] [2020-12-23 07:06:24,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351489500] [2020-12-23 07:06:24,667 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:32,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:06:32,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:32,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:06:32,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 07:06:32,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:32,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 27 [2020-12-23 07:06:32,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617873177] [2020-12-23 07:06:32,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:06:32,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:06:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:06:32,371 INFO L87 Difference]: Start difference. First operand 199 states and 240 transitions. Second operand 27 states. [2020-12-23 07:06:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:33,525 INFO L93 Difference]: Finished difference Result 238 states and 278 transitions. [2020-12-23 07:06:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 07:06:33,526 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 41 [2020-12-23 07:06:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:33,527 INFO L225 Difference]: With dead ends: 238 [2020-12-23 07:06:33,527 INFO L226 Difference]: Without dead ends: 219 [2020-12-23 07:06:33,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:06:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-23 07:06:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2020-12-23 07:06:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 07:06:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2020-12-23 07:06:33,547 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 41 [2020-12-23 07:06:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:33,547 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2020-12-23 07:06:33,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:06:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2020-12-23 07:06:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:06:33,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:33,548 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:33,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-23 07:06:33,749 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1735291263, now seen corresponding path program 96 times [2020-12-23 07:06:33,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:33,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229445338] [2020-12-23 07:06:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229445338] [2020-12-23 07:06:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623085037] [2020-12-23 07:06:34,112 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:34,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:06:34,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 07:06:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:34,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:06:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:34,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:34,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:06:34,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303994281] [2020-12-23 07:06:34,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:06:34,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:06:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:06:34,666 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand 16 states. [2020-12-23 07:06:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:35,397 INFO L93 Difference]: Finished difference Result 542 states and 670 transitions. [2020-12-23 07:06:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:06:35,398 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-12-23 07:06:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:35,400 INFO L225 Difference]: With dead ends: 542 [2020-12-23 07:06:35,400 INFO L226 Difference]: Without dead ends: 526 [2020-12-23 07:06:35,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:06:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-12-23 07:06:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 207. [2020-12-23 07:06:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 07:06:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 250 transitions. [2020-12-23 07:06:35,430 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 250 transitions. Word has length 42 [2020-12-23 07:06:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:35,430 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 250 transitions. [2020-12-23 07:06:35,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:06:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 250 transitions. [2020-12-23 07:06:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:06:35,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:35,431 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:35,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:35,632 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -463274033, now seen corresponding path program 97 times [2020-12-23 07:06:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:35,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991075890] [2020-12-23 07:06:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:06:36,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991075890] [2020-12-23 07:06:36,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470234276] [2020-12-23 07:06:36,275 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:06:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:06:36,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:36,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 07:06:36,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013113210] [2020-12-23 07:06:36,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:06:36,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:36,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:06:36,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:06:36,466 INFO L87 Difference]: Start difference. First operand 207 states and 250 transitions. Second operand 26 states. [2020-12-23 07:06:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:37,911 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2020-12-23 07:06:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:06:37,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2020-12-23 07:06:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:37,913 INFO L225 Difference]: With dead ends: 242 [2020-12-23 07:06:37,913 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 07:06:37,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=154, Invalid=1826, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:06:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 07:06:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 208. [2020-12-23 07:06:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-23 07:06:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 251 transitions. [2020-12-23 07:06:37,945 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 251 transitions. Word has length 42 [2020-12-23 07:06:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:37,949 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 251 transitions. [2020-12-23 07:06:37,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:06:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 251 transitions. [2020-12-23 07:06:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:06:37,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:37,950 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:38,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-12-23 07:06:38,164 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash -319340609, now seen corresponding path program 98 times [2020-12-23 07:06:38,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:38,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276184876] [2020-12-23 07:06:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:06:38,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276184876] [2020-12-23 07:06:38,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782035651] [2020-12-23 07:06:38,776 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:38,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:06:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:06:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:06:38,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:38,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:06:38,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020911634] [2020-12-23 07:06:38,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:06:38,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:06:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:06:38,957 INFO L87 Difference]: Start difference. First operand 208 states and 251 transitions. Second operand 25 states. [2020-12-23 07:06:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:40,678 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2020-12-23 07:06:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:06:40,679 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2020-12-23 07:06:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:40,680 INFO L225 Difference]: With dead ends: 245 [2020-12-23 07:06:40,680 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 07:06:40,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=160, Invalid=1910, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:06:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 07:06:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 209. [2020-12-23 07:06:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-23 07:06:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 252 transitions. [2020-12-23 07:06:40,705 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 252 transitions. Word has length 42 [2020-12-23 07:06:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:40,705 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 252 transitions. [2020-12-23 07:06:40,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:06:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 252 transitions. [2020-12-23 07:06:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:06:40,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:40,705 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:40,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-12-23 07:06:40,912 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash 249721231, now seen corresponding path program 99 times [2020-12-23 07:06:40,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:40,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625192843] [2020-12-23 07:06:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 07:06:41,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625192843] [2020-12-23 07:06:41,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029928589] [2020-12-23 07:06:41,480 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:42,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:06:42,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:06:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:44,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:44,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 40 [2020-12-23 07:06:44,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605383681] [2020-12-23 07:06:44,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:06:44,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:44,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:06:44,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1462, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:06:44,795 INFO L87 Difference]: Start difference. First operand 209 states and 252 transitions. Second operand 40 states. [2020-12-23 07:06:48,385 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-23 07:06:49,359 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-23 07:06:50,618 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-23 07:06:51,810 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-23 07:06:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:06:57,293 INFO L93 Difference]: Finished difference Result 334 states and 394 transitions. [2020-12-23 07:06:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 07:06:57,294 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-23 07:06:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:06:57,295 INFO L225 Difference]: With dead ends: 334 [2020-12-23 07:06:57,295 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 07:06:57,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=478, Invalid=7532, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:06:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 07:06:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2020-12-23 07:06:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-23 07:06:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2020-12-23 07:06:57,321 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 42 [2020-12-23 07:06:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:06:57,321 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2020-12-23 07:06:57,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:06:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2020-12-23 07:06:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:06:57,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:06:57,322 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:06:57,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-23 07:06:57,523 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:06:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:06:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1285251197, now seen corresponding path program 100 times [2020-12-23 07:06:57,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:06:57,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004896103] [2020-12-23 07:06:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:06:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:06:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:58,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004896103] [2020-12-23 07:06:58,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673262894] [2020-12-23 07:06:58,349 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:06:58,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:06:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:06:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 07:06:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:06:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 07:06:59,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:06:59,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2020-12-23 07:06:59,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322878068] [2020-12-23 07:06:59,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:06:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:06:59,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:06:59,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:06:59,338 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand 38 states. [2020-12-23 07:07:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:00,089 INFO L93 Difference]: Finished difference Result 237 states and 277 transitions. [2020-12-23 07:07:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:07:00,090 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2020-12-23 07:07:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:00,091 INFO L225 Difference]: With dead ends: 237 [2020-12-23 07:07:00,091 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 07:07:00,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:07:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 07:07:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-12-23 07:07:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 07:07:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2020-12-23 07:07:00,114 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 43 [2020-12-23 07:07:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:00,114 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2020-12-23 07:07:00,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:07:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2020-12-23 07:07:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:07:00,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:00,115 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:00,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:00,315 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash 412737973, now seen corresponding path program 101 times [2020-12-23 07:07:00,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:00,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070011790] [2020-12-23 07:07:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:07:01,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070011790] [2020-12-23 07:07:01,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300259583] [2020-12-23 07:07:01,148 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:03,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 07:07:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:07:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:07:04,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:04,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 37 [2020-12-23 07:07:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044674989] [2020-12-23 07:07:04,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:07:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:07:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:07:04,403 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 37 states. [2020-12-23 07:07:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:05,476 INFO L93 Difference]: Finished difference Result 242 states and 280 transitions. [2020-12-23 07:07:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:07:05,477 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 43 [2020-12-23 07:07:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:05,478 INFO L225 Difference]: With dead ends: 242 [2020-12-23 07:07:05,478 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 07:07:05,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:07:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 07:07:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 208. [2020-12-23 07:07:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-23 07:07:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 247 transitions. [2020-12-23 07:07:05,500 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 247 transitions. Word has length 43 [2020-12-23 07:07:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:05,501 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 247 transitions. [2020-12-23 07:07:05,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:07:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 247 transitions. [2020-12-23 07:07:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:07:05,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:05,501 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:05,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:05,702 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:05,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1375103363, now seen corresponding path program 102 times [2020-12-23 07:07:05,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:05,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308028405] [2020-12-23 07:07:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:07:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308028405] [2020-12-23 07:07:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277466999] [2020-12-23 07:07:06,515 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:07,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 07:07:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 07:07:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:07:07,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:07,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 28 [2020-12-23 07:07:07,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612626380] [2020-12-23 07:07:07,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:07:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:07:07,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:07:07,889 INFO L87 Difference]: Start difference. First operand 208 states and 247 transitions. Second operand 28 states. [2020-12-23 07:07:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:10,116 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2020-12-23 07:07:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:07:10,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 43 [2020-12-23 07:07:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:10,119 INFO L225 Difference]: With dead ends: 245 [2020-12-23 07:07:10,119 INFO L226 Difference]: Without dead ends: 227 [2020-12-23 07:07:10,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=150, Invalid=1830, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:07:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-23 07:07:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 209. [2020-12-23 07:07:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-23 07:07:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 248 transitions. [2020-12-23 07:07:10,142 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 248 transitions. Word has length 43 [2020-12-23 07:07:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:10,142 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 248 transitions. [2020-12-23 07:07:10,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:07:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 248 transitions. [2020-12-23 07:07:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:07:10,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:10,143 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:10,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:10,344 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash 723640245, now seen corresponding path program 103 times [2020-12-23 07:07:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:10,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771638182] [2020-12-23 07:07:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 07:07:11,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771638182] [2020-12-23 07:07:11,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834741416] [2020-12-23 07:07:11,112 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:11,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:07:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 07:07:11,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:11,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:07:11,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428219889] [2020-12-23 07:07:11,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:07:11,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:11,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:07:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:11,332 INFO L87 Difference]: Start difference. First operand 209 states and 248 transitions. Second operand 25 states. [2020-12-23 07:07:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:13,358 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2020-12-23 07:07:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:07:13,360 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2020-12-23 07:07:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:13,360 INFO L225 Difference]: With dead ends: 248 [2020-12-23 07:07:13,361 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 07:07:13,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=1662, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:07:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 07:07:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2020-12-23 07:07:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-23 07:07:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2020-12-23 07:07:13,384 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2020-12-23 07:07:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:13,384 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2020-12-23 07:07:13,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:07:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2020-12-23 07:07:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 07:07:13,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:13,384 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:13,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-23 07:07:13,585 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:13,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1832377077, now seen corresponding path program 104 times [2020-12-23 07:07:13,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139841403] [2020-12-23 07:07:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:15,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139841403] [2020-12-23 07:07:15,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135300600] [2020-12-23 07:07:15,107 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:15,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:15,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 07:07:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:15,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:15,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 07:07:15,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110775747] [2020-12-23 07:07:15,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:07:15,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:15,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:07:15,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:07:15,363 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand 35 states. [2020-12-23 07:07:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:20,073 INFO L93 Difference]: Finished difference Result 316 states and 410 transitions. [2020-12-23 07:07:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 07:07:20,074 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-12-23 07:07:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:20,075 INFO L225 Difference]: With dead ends: 316 [2020-12-23 07:07:20,075 INFO L226 Difference]: Without dead ends: 304 [2020-12-23 07:07:20,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=214, Invalid=3692, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:07:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-23 07:07:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 221. [2020-12-23 07:07:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-23 07:07:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2020-12-23 07:07:20,100 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 43 [2020-12-23 07:07:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:20,100 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2020-12-23 07:07:20,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:07:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2020-12-23 07:07:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:07:20,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:20,101 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:20,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-12-23 07:07:20,301 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1799306383, now seen corresponding path program 105 times [2020-12-23 07:07:20,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:20,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589496287] [2020-12-23 07:07:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:07:21,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589496287] [2020-12-23 07:07:21,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297988586] [2020-12-23 07:07:21,220 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:22,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:07:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:22,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 07:07:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-23 07:07:23,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:23,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2020-12-23 07:07:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076636146] [2020-12-23 07:07:23,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:07:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:07:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:07:23,557 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand 39 states. [2020-12-23 07:07:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:24,986 INFO L93 Difference]: Finished difference Result 256 states and 296 transitions. [2020-12-23 07:07:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:07:24,987 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2020-12-23 07:07:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:24,988 INFO L225 Difference]: With dead ends: 256 [2020-12-23 07:07:24,988 INFO L226 Difference]: Without dead ends: 239 [2020-12-23 07:07:24,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:07:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-12-23 07:07:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 222. [2020-12-23 07:07:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-23 07:07:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2020-12-23 07:07:25,013 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 44 [2020-12-23 07:07:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:25,013 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2020-12-23 07:07:25,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:07:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2020-12-23 07:07:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:07:25,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:25,013 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:25,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-23 07:07:25,214 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:25,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1931708353, now seen corresponding path program 106 times [2020-12-23 07:07:25,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:25,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146885307] [2020-12-23 07:07:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:07:26,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146885307] [2020-12-23 07:07:26,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787063093] [2020-12-23 07:07:26,129 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:26,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:26,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:07:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 07:07:26,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:26,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:07:26,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309682762] [2020-12-23 07:07:26,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:07:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:26,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:07:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:07:26,389 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand 27 states. [2020-12-23 07:07:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:28,627 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2020-12-23 07:07:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:07:28,631 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-12-23 07:07:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:28,632 INFO L225 Difference]: With dead ends: 259 [2020-12-23 07:07:28,632 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 07:07:28,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:07:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 07:07:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 223. [2020-12-23 07:07:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 07:07:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2020-12-23 07:07:28,671 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 44 [2020-12-23 07:07:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:28,671 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2020-12-23 07:07:28,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:07:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2020-12-23 07:07:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:07:28,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:28,671 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:28,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-23 07:07:28,872 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:28,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1764739505, now seen corresponding path program 107 times [2020-12-23 07:07:28,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:28,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796815248] [2020-12-23 07:07:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-23 07:07:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796815248] [2020-12-23 07:07:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728797096] [2020-12-23 07:07:29,650 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true