/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-178dd20 [2021-01-06 16:57:34,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:57:34,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:57:34,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:57:34,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:57:34,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:57:34,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:57:34,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:57:34,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:57:34,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:57:34,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:57:34,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:57:34,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:57:34,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:57:34,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:57:34,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:57:34,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:57:34,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:57:34,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:57:34,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:57:34,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:57:34,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:57:34,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:57:34,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:57:34,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:57:34,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:57:34,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:57:34,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:57:34,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:57:34,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:57:34,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:57:34,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:57:34,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:57:34,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:57:34,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:57:34,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:57:34,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:57:34,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:57:34,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:57:34,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:57:34,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:57:34,227 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:57:34,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:57:34,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:57:34,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:57:34,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:57:34,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:57:34,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:57:34,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:57:34,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:57:34,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:57:34,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:57:34,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:57:34,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:57:34,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:57:34,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:57:34,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:57:34,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:57:34,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:57:34,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:57:34,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:57:34,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:57:34,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:57:34,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:57:34,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:57:34,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:57:34,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:57:34,689 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:57:34,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2021-01-06 16:57:34,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab40d7bb6/dacb1b8657a54cd89a8f41835ea8018b/FLAGabb8f45c1 [2021-01-06 16:57:35,367 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:57:35,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de32.c [2021-01-06 16:57:35,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab40d7bb6/dacb1b8657a54cd89a8f41835ea8018b/FLAGabb8f45c1 [2021-01-06 16:57:35,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab40d7bb6/dacb1b8657a54cd89a8f41835ea8018b [2021-01-06 16:57:35,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:57:35,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:57:35,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:57:35,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:57:35,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:57:35,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:35,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71812541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35, skipping insertion in model container [2021-01-06 16:57:35,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:35,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:57:35,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:57:35,910 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,] [2021-01-06 16:57:35,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:57:35,937 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:57:35,950 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,] [2021-01-06 16:57:35,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:57:35,970 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:57:35,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35 WrapperNode [2021-01-06 16:57:35,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:57:35,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:57:35,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:57:35,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:57:35,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:35,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:57:36,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:57:36,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:57:36,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:57:36,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (1/1) ... [2021-01-06 16:57:36,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:57:36,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:57:36,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:57:36,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:57:36,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (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 [2021-01-06 16:57:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:57:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:57:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:57:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:57:36,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:57:36,460 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:57:36,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:57:36 BoogieIcfgContainer [2021-01-06 16:57:36,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:57:36,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:57:36,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:57:36,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:57:36,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:57:35" (1/3) ... [2021-01-06 16:57:36,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d27f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:57:36, skipping insertion in model container [2021-01-06 16:57:36,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:57:35" (2/3) ... [2021-01-06 16:57:36,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d27f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:57:36, skipping insertion in model container [2021-01-06 16:57:36,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:57:36" (3/3) ... [2021-01-06 16:57:36,470 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de32.c [2021-01-06 16:57:36,477 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:57:36,482 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:57:36,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:57:36,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:57:36,535 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:57:36,535 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:57:36,535 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:57:36,535 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:57:36,535 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:57:36,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:57:36,536 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:57:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-01-06 16:57:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:57:36,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:36,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:36,560 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1157484939, now seen corresponding path program 1 times [2021-01-06 16:57:36,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:36,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874779667] [2021-01-06 16:57:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:36,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874779667] [2021-01-06 16:57:36,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:57:36,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:57:36,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335020433] [2021-01-06 16:57:36,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:57:36,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:57:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:57:36,993 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2021-01-06 16:57:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:37,089 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2021-01-06 16:57:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:57:37,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 16:57:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:37,133 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:57:37,133 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:57:37,139 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 [2021-01-06 16:57:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:57:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:57:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:57:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-01-06 16:57:37,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2021-01-06 16:57:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:37,197 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-01-06 16:57:37,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:57:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-01-06 16:57:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:57:37,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:37,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:37,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:57:37,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:37,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1520629346, now seen corresponding path program 1 times [2021-01-06 16:57:37,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:37,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004179644] [2021-01-06 16:57:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:37,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004179644] [2021-01-06 16:57:37,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:57:37,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:57:37,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019547522] [2021-01-06 16:57:37,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:57:37,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:37,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:57:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:57:37,326 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 3 states. [2021-01-06 16:57:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:37,352 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-01-06 16:57:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:57:37,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:57:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:37,355 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:57:37,355 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:57:37,357 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 [2021-01-06 16:57:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:57:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-01-06 16:57:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:57:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-01-06 16:57:37,369 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2021-01-06 16:57:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:37,370 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-01-06 16:57:37,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:57:37,370 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-01-06 16:57:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:57:37,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:37,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:37,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:57:37,372 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:37,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1475376817, now seen corresponding path program 1 times [2021-01-06 16:57:37,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:37,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181329778] [2021-01-06 16:57:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:37,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181329778] [2021-01-06 16:57:37,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:57:37,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:57:37,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138367924] [2021-01-06 16:57:37,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:57:37,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:57:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:57:37,441 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 4 states. [2021-01-06 16:57:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:37,469 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-01-06 16:57:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:57:37,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-01-06 16:57:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:37,471 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:57:37,471 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:57:37,472 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 [2021-01-06 16:57:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:57:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:57:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:57:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 16:57:37,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2021-01-06 16:57:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:37,476 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 16:57:37,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:57:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 16:57:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:57:37,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:37,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:37,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:57:37,477 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash 925156739, now seen corresponding path program 1 times [2021-01-06 16:57:37,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:37,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446414594] [2021-01-06 16:57:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:37,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446414594] [2021-01-06 16:57:37,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138858704] [2021-01-06 16:57:37,566 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 [2021-01-06 16:57:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:37,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:57:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:37,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:37,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:57:37,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771544947] [2021-01-06 16:57:37,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:57:37,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:37,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:57:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:57:37,700 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 6 states. [2021-01-06 16:57:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:37,744 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-01-06 16:57:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:57:37,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-06 16:57:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:37,746 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:57:37,746 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:57:37,747 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 [2021-01-06 16:57:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:57:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-01-06 16:57:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:57:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-01-06 16:57:37,752 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2021-01-06 16:57:37,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:37,753 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-01-06 16:57:37,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:57:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-01-06 16:57:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:57:37,754 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:37,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:37,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:37,969 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash 19581631, now seen corresponding path program 1 times [2021-01-06 16:57:37,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:37,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075019091] [2021-01-06 16:57:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:38,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075019091] [2021-01-06 16:57:38,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817977854] [2021-01-06 16:57:38,062 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 [2021-01-06 16:57:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:57:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:38,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:57:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:38,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:38,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:57:38,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236591766] [2021-01-06 16:57:38,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:57:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:57:38,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:57:38,178 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 6 states. [2021-01-06 16:57:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:38,230 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-01-06 16:57:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:57:38,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 16:57:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:38,233 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:57:38,233 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:57:38,234 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 [2021-01-06 16:57:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:57:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-01-06 16:57:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:57:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-01-06 16:57:38,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2021-01-06 16:57:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:38,245 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-01-06 16:57:38,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:57:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-01-06 16:57:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:57:38,246 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:38,246 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:38,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:38,461 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash -564885954, now seen corresponding path program 2 times [2021-01-06 16:57:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:38,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591787291] [2021-01-06 16:57:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:38,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591787291] [2021-01-06 16:57:38,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037862995] [2021-01-06 16:57:38,544 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 [2021-01-06 16:57:38,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:38,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:38,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:57:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:38,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:38,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:57:38,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564280158] [2021-01-06 16:57:38,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:57:38,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:57:38,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:57:38,652 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 7 states. [2021-01-06 16:57:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:38,712 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2021-01-06 16:57:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:57:38,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:57:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:38,714 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:57:38,714 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:57:38,715 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 [2021-01-06 16:57:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:57:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-01-06 16:57:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:57:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-01-06 16:57:38,721 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 12 [2021-01-06 16:57:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:38,722 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-01-06 16:57:38,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:57:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-01-06 16:57:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:57:38,723 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:38,723 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:38,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:38,938 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:38,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2011524355, now seen corresponding path program 2 times [2021-01-06 16:57:38,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:38,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049097272] [2021-01-06 16:57:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:39,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049097272] [2021-01-06 16:57:39,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872981523] [2021-01-06 16:57:39,017 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 [2021-01-06 16:57:39,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:57:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:39,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:39,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 16:57:39,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494752363] [2021-01-06 16:57:39,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:57:39,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:39,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:57:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:57:39,127 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 8 states. [2021-01-06 16:57:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:39,166 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-01-06 16:57:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:57:39,167 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 16:57:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:39,168 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:57:39,168 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:57:39,173 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 [2021-01-06 16:57:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:57:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 16:57:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:57:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-01-06 16:57:39,184 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2021-01-06 16:57:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:39,184 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-01-06 16:57:39,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:57:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-01-06 16:57:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:57:39,185 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:39,185 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:39,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:39,400 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash 488430819, now seen corresponding path program 3 times [2021-01-06 16:57:39,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:39,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990820262] [2021-01-06 16:57:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:57:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990820262] [2021-01-06 16:57:39,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116934395] [2021-01-06 16:57:39,482 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 [2021-01-06 16:57:39,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:57:39,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:57:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:57:39,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:57:39,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 16:57:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158200411] [2021-01-06 16:57:39,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:57:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:39,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:57:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:57:39,563 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 4 states. [2021-01-06 16:57:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:39,586 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-01-06 16:57:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:57:39,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 16:57:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:39,587 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:57:39,587 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:57:39,588 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 [2021-01-06 16:57:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:57:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 16:57:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:57:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-01-06 16:57:39,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-01-06 16:57:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:39,592 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-01-06 16:57:39,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:57:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-01-06 16:57:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:57:39,593 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:39,593 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:39,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:39,808 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash 533683348, now seen corresponding path program 1 times [2021-01-06 16:57:39,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:39,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158043577] [2021-01-06 16:57:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:39,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158043577] [2021-01-06 16:57:39,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930782461] [2021-01-06 16:57:39,889 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 [2021-01-06 16:57:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:39,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:57:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:39,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:39,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:57:39,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349786740] [2021-01-06 16:57:39,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:57:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:57:39,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:57:39,992 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 9 states. [2021-01-06 16:57:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:40,122 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-01-06 16:57:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:57:40,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 16:57:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:40,129 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:57:40,129 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:57:40,129 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 [2021-01-06 16:57:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:57:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-01-06 16:57:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:57:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-01-06 16:57:40,143 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 13 [2021-01-06 16:57:40,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:40,144 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-01-06 16:57:40,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:57:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-01-06 16:57:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:57:40,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:40,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:40,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:40,360 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1098222449, now seen corresponding path program 3 times [2021-01-06 16:57:40,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:40,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910650942] [2021-01-06 16:57:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:40,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910650942] [2021-01-06 16:57:40,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684438590] [2021-01-06 16:57:40,444 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 [2021-01-06 16:57:40,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:57:40,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:57:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:40,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:40,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 16:57:40,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477737679] [2021-01-06 16:57:40,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:57:40,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:57:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:57:40,593 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 9 states. [2021-01-06 16:57:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:40,674 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-01-06 16:57:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:57:40,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 16:57:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:40,675 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:57:40,675 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:57:40,676 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 [2021-01-06 16:57:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:57:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-01-06 16:57:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:57:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-01-06 16:57:40,683 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2021-01-06 16:57:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:40,684 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-01-06 16:57:40,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:57:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-01-06 16:57:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:57:40,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:40,685 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:40,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:57:40,901 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:40,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:40,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1173235057, now seen corresponding path program 2 times [2021-01-06 16:57:40,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:40,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397148101] [2021-01-06 16:57:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:41,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397148101] [2021-01-06 16:57:41,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389710329] [2021-01-06 16:57:41,061 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 [2021-01-06 16:57:41,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:41,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:57:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:41,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:41,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:57:41,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399005976] [2021-01-06 16:57:41,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:57:41,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:41,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:57:41,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:57:41,184 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 10 states. [2021-01-06 16:57:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:41,338 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2021-01-06 16:57:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:57:41,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 16:57:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:41,339 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:57:41,339 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:57:41,339 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 [2021-01-06 16:57:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:57:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-01-06 16:57:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:57:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-01-06 16:57:41,346 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 14 [2021-01-06 16:57:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:41,346 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-01-06 16:57:41,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:57:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-01-06 16:57:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:57:41,347 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:41,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:41,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 16:57:41,561 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash 854515253, now seen corresponding path program 4 times [2021-01-06 16:57:41,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:41,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267768952] [2021-01-06 16:57:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:41,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267768952] [2021-01-06 16:57:41,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867123594] [2021-01-06 16:57:41,647 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 [2021-01-06 16:57:41,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:41,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:57:41,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:41,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:57:41,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:57:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:41,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:41,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:57:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009139575] [2021-01-06 16:57:41,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:57:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:57:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:57:41,777 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 7 states. [2021-01-06 16:57:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:41,849 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-01-06 16:57:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:57:41,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 16:57:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:41,850 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:57:41,850 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 16:57:41,851 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 [2021-01-06 16:57:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 16:57:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2021-01-06 16:57:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:57:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-01-06 16:57:41,858 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 15 [2021-01-06 16:57:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:41,859 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-01-06 16:57:41,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:57:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-01-06 16:57:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:57:41,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:41,860 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:42,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:42,069 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:42,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:42,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1746869236, now seen corresponding path program 3 times [2021-01-06 16:57:42,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:42,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941133303] [2021-01-06 16:57:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:42,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941133303] [2021-01-06 16:57:42,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574480302] [2021-01-06 16:57:42,209 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 [2021-01-06 16:57:42,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:57:42,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:57:42,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:42,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:42,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2021-01-06 16:57:42,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115853585] [2021-01-06 16:57:42,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:57:42,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:57:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:57:42,309 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 12 states. [2021-01-06 16:57:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:42,539 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2021-01-06 16:57:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:57:42,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 16:57:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:42,540 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:57:42,540 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 16:57:42,541 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 [2021-01-06 16:57:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 16:57:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-01-06 16:57:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:57:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-01-06 16:57:42,549 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 15 [2021-01-06 16:57:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:42,549 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-01-06 16:57:42,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:57:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-01-06 16:57:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:57:42,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:42,550 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:42,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:42,763 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1259841871, now seen corresponding path program 5 times [2021-01-06 16:57:42,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:42,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259054854] [2021-01-06 16:57:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:42,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259054854] [2021-01-06 16:57:42,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270086288] [2021-01-06 16:57:42,854 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 [2021-01-06 16:57:42,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 16:57:42,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:42,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:57:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:43,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:43,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-01-06 16:57:43,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251876900] [2021-01-06 16:57:43,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:57:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:57:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:57:43,002 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 11 states. [2021-01-06 16:57:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:43,047 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-01-06 16:57:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:57:43,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 16:57:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:43,048 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:57:43,048 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:57:43,048 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 [2021-01-06 16:57:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:57:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 16:57:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:57:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-01-06 16:57:43,054 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2021-01-06 16:57:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:43,055 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-01-06 16:57:43,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:57:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-01-06 16:57:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:57:43,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:43,056 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:43,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:57:43,271 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1966551549, now seen corresponding path program 6 times [2021-01-06 16:57:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:43,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855541985] [2021-01-06 16:57:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:57:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855541985] [2021-01-06 16:57:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592380692] [2021-01-06 16:57:43,374 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 [2021-01-06 16:57:43,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 16:57:43,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:57:43,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:57:43,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:43,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-06 16:57:43,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982749990] [2021-01-06 16:57:43,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:57:43,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:43,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:57:43,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:57:43,508 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 12 states. [2021-01-06 16:57:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:43,596 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-01-06 16:57:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:57:43,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2021-01-06 16:57:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:43,597 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:57:43,597 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:57:43,599 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 [2021-01-06 16:57:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:57:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-01-06 16:57:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:57:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-01-06 16:57:43,608 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2021-01-06 16:57:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:43,609 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-01-06 16:57:43,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:57:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-01-06 16:57:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:57:43,609 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:43,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:43,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:57:43,823 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1333529985, now seen corresponding path program 7 times [2021-01-06 16:57:43,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:43,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385606615] [2021-01-06 16:57:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:57:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385606615] [2021-01-06 16:57:43,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819058771] [2021-01-06 16:57:43,948 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 [2021-01-06 16:57:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:57:44,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:44,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:57:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:57:44,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:44,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:57:44,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242332345] [2021-01-06 16:57:44,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:57:44,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:44,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:57:44,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:57:44,046 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2021-01-06 16:57:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:44,127 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-01-06 16:57:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:57:44,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-01-06 16:57:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:44,139 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:57:44,139 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:57:44,144 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 [2021-01-06 16:57:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:57:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2021-01-06 16:57:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:57:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-01-06 16:57:44,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 18 [2021-01-06 16:57:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:44,160 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-01-06 16:57:44,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:57:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-01-06 16:57:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:57:44,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:44,161 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:44,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:57:44,377 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:44,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2021795279, now seen corresponding path program 8 times [2021-01-06 16:57:44,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:44,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023009377] [2021-01-06 16:57:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:44,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023009377] [2021-01-06 16:57:44,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640896704] [2021-01-06 16:57:44,552 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 [2021-01-06 16:57:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:57:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:44,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:44,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:57:44,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455387401] [2021-01-06 16:57:44,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:57:44,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:44,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:57:44,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:57:44,677 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 12 states. [2021-01-06 16:57:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:44,862 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2021-01-06 16:57:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:57:44,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-01-06 16:57:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:44,863 INFO L225 Difference]: With dead ends: 78 [2021-01-06 16:57:44,864 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 16:57:44,864 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 [2021-01-06 16:57:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 16:57:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2021-01-06 16:57:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 16:57:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-01-06 16:57:44,877 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 18 [2021-01-06 16:57:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:44,878 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-01-06 16:57:44,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:57:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-01-06 16:57:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:57:44,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:44,879 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:45,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:45,094 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1110269315, now seen corresponding path program 9 times [2021-01-06 16:57:45,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:45,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920884652] [2021-01-06 16:57:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:57:45,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920884652] [2021-01-06 16:57:45,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529663671] [2021-01-06 16:57:45,203 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 [2021-01-06 16:57:45,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:57:45,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:45,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:57:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:57:45,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:45,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-01-06 16:57:45,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812601451] [2021-01-06 16:57:45,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:57:45,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:45,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:57:45,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:57:45,384 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 14 states. [2021-01-06 16:57:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:45,459 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-01-06 16:57:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:57:45,460 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2021-01-06 16:57:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:45,461 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:57:45,461 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:57:45,462 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 [2021-01-06 16:57:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:57:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 16:57:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:57:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-01-06 16:57:45,468 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2021-01-06 16:57:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:45,468 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-01-06 16:57:45,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:57:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-01-06 16:57:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:57:45,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:45,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:45,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:57:45,674 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1199465141, now seen corresponding path program 10 times [2021-01-06 16:57:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:45,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324430074] [2021-01-06 16:57:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:45,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324430074] [2021-01-06 16:57:45,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580071789] [2021-01-06 16:57:45,829 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 [2021-01-06 16:57:45,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:57:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:45,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:45,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-01-06 16:57:45,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985134853] [2021-01-06 16:57:45,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:57:45,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:57:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:57:45,974 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 13 states. [2021-01-06 16:57:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:46,051 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-01-06 16:57:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:57:46,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2021-01-06 16:57:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:46,052 INFO L225 Difference]: With dead ends: 65 [2021-01-06 16:57:46,052 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:57:46,053 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 [2021-01-06 16:57:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:57:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-01-06 16:57:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:57:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-01-06 16:57:46,058 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 19 [2021-01-06 16:57:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:46,058 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-01-06 16:57:46,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:57:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-01-06 16:57:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:57:46,059 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:46,059 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:46,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:46,273 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash -241816396, now seen corresponding path program 11 times [2021-01-06 16:57:46,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:46,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084834820] [2021-01-06 16:57:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:46,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084834820] [2021-01-06 16:57:46,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104680520] [2021-01-06 16:57:46,433 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 [2021-01-06 16:57:46,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:57:46,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:57:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:46,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:46,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:57:46,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513020309] [2021-01-06 16:57:46,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:57:46,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:57:46,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:57:46,592 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 13 states. [2021-01-06 16:57:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:46,805 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2021-01-06 16:57:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:57:46,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2021-01-06 16:57:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:46,806 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:57:46,806 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 16:57:46,807 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 [2021-01-06 16:57:46,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 16:57:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-01-06 16:57:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 16:57:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-01-06 16:57:46,812 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 19 [2021-01-06 16:57:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:46,813 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-01-06 16:57:46,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:57:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-01-06 16:57:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:57:46,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:46,814 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:47,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:47,029 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 159423631, now seen corresponding path program 12 times [2021-01-06 16:57:47,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:47,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140373527] [2021-01-06 16:57:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:47,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140373527] [2021-01-06 16:57:47,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417592913] [2021-01-06 16:57:47,174 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 [2021-01-06 16:57:47,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 16:57:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:57:47,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:47,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:47,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-01-06 16:57:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564108213] [2021-01-06 16:57:47,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:57:47,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:57:47,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:57:47,375 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 15 states. [2021-01-06 16:57:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:47,501 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-01-06 16:57:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:57:47,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2021-01-06 16:57:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:47,502 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:57:47,503 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 16:57:47,503 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 [2021-01-06 16:57:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 16:57:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-01-06 16:57:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 16:57:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-01-06 16:57:47,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 20 [2021-01-06 16:57:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:47,508 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-01-06 16:57:47,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:57:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-01-06 16:57:47,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:57:47,509 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:47,509 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:47,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:57:47,724 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1694301585, now seen corresponding path program 13 times [2021-01-06 16:57:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:47,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88072371] [2021-01-06 16:57:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:47,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88072371] [2021-01-06 16:57:47,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299867702] [2021-01-06 16:57:47,892 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 [2021-01-06 16:57:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:57:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:47,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:47,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:57:47,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877899014] [2021-01-06 16:57:47,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:57:47,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:57:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:57:47,996 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 14 states. [2021-01-06 16:57:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:48,339 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2021-01-06 16:57:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:57:48,345 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2021-01-06 16:57:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:48,346 INFO L225 Difference]: With dead ends: 88 [2021-01-06 16:57:48,346 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:57:48,348 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 [2021-01-06 16:57:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:57:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-01-06 16:57:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:57:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2021-01-06 16:57:48,357 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 20 [2021-01-06 16:57:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:48,358 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2021-01-06 16:57:48,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:57:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2021-01-06 16:57:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:57:48,358 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:48,359 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:48,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:48,573 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2017092107, now seen corresponding path program 14 times [2021-01-06 16:57:48,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:48,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474791494] [2021-01-06 16:57:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:48,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474791494] [2021-01-06 16:57:48,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574318905] [2021-01-06 16:57:48,677 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 [2021-01-06 16:57:48,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:57:48,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:48,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:57:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:48,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:48,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:57:48,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990052340] [2021-01-06 16:57:48,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:57:48,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:48,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:57:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:57:48,780 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 9 states. [2021-01-06 16:57:48,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:48,922 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-01-06 16:57:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:57:48,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 16:57:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:48,924 INFO L225 Difference]: With dead ends: 128 [2021-01-06 16:57:48,924 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 16:57:48,924 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 [2021-01-06 16:57:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 16:57:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 64. [2021-01-06 16:57:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 16:57:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-01-06 16:57:48,932 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 21 [2021-01-06 16:57:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:48,932 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-01-06 16:57:48,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:57:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-01-06 16:57:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:57:48,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:48,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:49,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:57:49,147 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:49,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash 747978499, now seen corresponding path program 15 times [2021-01-06 16:57:49,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:49,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566487988] [2021-01-06 16:57:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:49,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566487988] [2021-01-06 16:57:49,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099155237] [2021-01-06 16:57:49,280 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 [2021-01-06 16:57:49,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:57:49,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:49,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:57:49,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:49,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:49,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:57:49,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836322931] [2021-01-06 16:57:49,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:57:49,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:57:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:57:49,479 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 12 states. [2021-01-06 16:57:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:49,677 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-01-06 16:57:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:57:49,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2021-01-06 16:57:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:49,678 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:57:49,678 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:57:49,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:57:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:57:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2021-01-06 16:57:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:57:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2021-01-06 16:57:49,685 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 21 [2021-01-06 16:57:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:49,686 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2021-01-06 16:57:49,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:57:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2021-01-06 16:57:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:57:49,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:49,686 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:49,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:57:49,902 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash 523297812, now seen corresponding path program 16 times [2021-01-06 16:57:49,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:49,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848807918] [2021-01-06 16:57:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:50,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848807918] [2021-01-06 16:57:50,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877540799] [2021-01-06 16:57:50,108 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 [2021-01-06 16:57:50,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:50,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:57:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:50,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:50,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:57:50,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784486865] [2021-01-06 16:57:50,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:57:50,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:50,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:57:50,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:57:50,221 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 15 states. [2021-01-06 16:57:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:50,563 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2021-01-06 16:57:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:57:50,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2021-01-06 16:57:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:50,564 INFO L225 Difference]: With dead ends: 106 [2021-01-06 16:57:50,564 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 16:57:50,565 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 [2021-01-06 16:57:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 16:57:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2021-01-06 16:57:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:57:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2021-01-06 16:57:50,572 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 21 [2021-01-06 16:57:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:50,572 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-01-06 16:57:50,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:57:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2021-01-06 16:57:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:57:50,573 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:50,573 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:50,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:50,787 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash -769603249, now seen corresponding path program 17 times [2021-01-06 16:57:50,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:50,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386106483] [2021-01-06 16:57:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:50,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386106483] [2021-01-06 16:57:50,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623717350] [2021-01-06 16:57:50,943 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 [2021-01-06 16:57:51,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:57:51,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:57:51,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:57:51,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:51,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-01-06 16:57:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727844516] [2021-01-06 16:57:51,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:57:51,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:57:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:57:51,356 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand 17 states. [2021-01-06 16:57:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:51,458 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-01-06 16:57:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:57:51,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2021-01-06 16:57:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:51,460 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:57:51,460 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:57:51,461 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 [2021-01-06 16:57:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:57:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-01-06 16:57:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 16:57:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-01-06 16:57:51,467 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 22 [2021-01-06 16:57:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:51,467 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-01-06 16:57:51,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:57:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-01-06 16:57:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:57:51,467 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:51,468 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:51,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:57:51,671 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash 674935231, now seen corresponding path program 18 times [2021-01-06 16:57:51,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:51,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700953257] [2021-01-06 16:57:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:51,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700953257] [2021-01-06 16:57:51,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779898337] [2021-01-06 16:57:51,808 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 [2021-01-06 16:57:51,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:57:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:57:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:52,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:52,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-01-06 16:57:52,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404324964] [2021-01-06 16:57:52,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:57:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:52,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:57:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:57:52,051 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 16 states. [2021-01-06 16:57:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:52,246 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-01-06 16:57:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:57:52,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2021-01-06 16:57:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:52,247 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:57:52,247 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:57:52,247 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 [2021-01-06 16:57:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:57:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2021-01-06 16:57:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:57:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2021-01-06 16:57:52,255 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 22 [2021-01-06 16:57:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:52,255 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2021-01-06 16:57:52,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:57:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2021-01-06 16:57:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:57:52,256 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:52,256 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:52,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:52,470 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 549402383, now seen corresponding path program 19 times [2021-01-06 16:57:52,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:52,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949161693] [2021-01-06 16:57:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949161693] [2021-01-06 16:57:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722303348] [2021-01-06 16:57:52,665 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 [2021-01-06 16:57:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:57:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:52,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:52,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:57:52,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819101388] [2021-01-06 16:57:52,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:57:52,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:57:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:57:52,773 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 16 states. [2021-01-06 16:57:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:53,169 INFO L93 Difference]: Finished difference Result 107 states and 147 transitions. [2021-01-06 16:57:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:57:53,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2021-01-06 16:57:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:53,171 INFO L225 Difference]: With dead ends: 107 [2021-01-06 16:57:53,171 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 16:57:53,171 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 [2021-01-06 16:57:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 16:57:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2021-01-06 16:57:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:57:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2021-01-06 16:57:53,179 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 22 [2021-01-06 16:57:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:53,179 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-01-06 16:57:53,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:57:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2021-01-06 16:57:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:57:53,180 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:53,180 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:53,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:57:53,394 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1589406077, now seen corresponding path program 20 times [2021-01-06 16:57:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:53,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624388719] [2021-01-06 16:57:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:53,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624388719] [2021-01-06 16:57:53,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963768565] [2021-01-06 16:57:53,572 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 [2021-01-06 16:57:53,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:53,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:57:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:53,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:53,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-01-06 16:57:53,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967124368] [2021-01-06 16:57:53,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:57:53,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:53,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:57:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:57:53,762 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand 18 states. [2021-01-06 16:57:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:53,952 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2021-01-06 16:57:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:57:53,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2021-01-06 16:57:53,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:53,954 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:57:53,954 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:57:53,955 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 [2021-01-06 16:57:53,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:57:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-01-06 16:57:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:57:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-01-06 16:57:53,962 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 23 [2021-01-06 16:57:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:53,962 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-01-06 16:57:53,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:57:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-01-06 16:57:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:57:53,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:53,963 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:54,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:57:54,172 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:54,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1771563211, now seen corresponding path program 21 times [2021-01-06 16:57:54,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:54,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103331987] [2021-01-06 16:57:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:57:54,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103331987] [2021-01-06 16:57:54,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714036190] [2021-01-06 16:57:54,311 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 [2021-01-06 16:57:54,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:57:54,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:57:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:57:54,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:54,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:57:54,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21450169] [2021-01-06 16:57:54,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:57:54,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:57:54,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:57:54,473 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand 13 states. [2021-01-06 16:57:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:54,727 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2021-01-06 16:57:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:57:54,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2021-01-06 16:57:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:54,729 INFO L225 Difference]: With dead ends: 95 [2021-01-06 16:57:54,729 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 16:57:54,733 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 [2021-01-06 16:57:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 16:57:54,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-01-06 16:57:54,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:57:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-01-06 16:57:54,741 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 23 [2021-01-06 16:57:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:54,742 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-01-06 16:57:54,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:57:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-01-06 16:57:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:57:54,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:54,742 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:54,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:54,957 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1358644084, now seen corresponding path program 22 times [2021-01-06 16:57:54,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:54,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157777243] [2021-01-06 16:57:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:55,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157777243] [2021-01-06 16:57:55,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546298813] [2021-01-06 16:57:55,221 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 [2021-01-06 16:57:55,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:55,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:55,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:57:55,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:55,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:55,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-06 16:57:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269961283] [2021-01-06 16:57:55,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:57:55,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:55,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:57:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:57:55,346 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 18 states. [2021-01-06 16:57:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:55,791 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-01-06 16:57:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:57:55,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2021-01-06 16:57:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:55,792 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:57:55,793 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 16:57:55,793 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 [2021-01-06 16:57:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 16:57:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2021-01-06 16:57:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:57:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-01-06 16:57:55,800 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 23 [2021-01-06 16:57:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:55,800 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-01-06 16:57:55,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:57:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-01-06 16:57:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:57:55,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:55,801 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:56,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:56,015 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:56,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1230457407, now seen corresponding path program 23 times [2021-01-06 16:57:56,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:56,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729815475] [2021-01-06 16:57:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:56,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729815475] [2021-01-06 16:57:56,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632946689] [2021-01-06 16:57:56,144 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 [2021-01-06 16:57:56,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:57:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:57:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:56,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:57:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:57:56,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:56,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 21] total 23 [2021-01-06 16:57:56,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818231461] [2021-01-06 16:57:56,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:57:56,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:57:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:57:56,767 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 23 states. [2021-01-06 16:57:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:57,461 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2021-01-06 16:57:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:57:57,461 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 24 [2021-01-06 16:57:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:57,463 INFO L225 Difference]: With dead ends: 198 [2021-01-06 16:57:57,463 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:57:57,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:57:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:57:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 83. [2021-01-06 16:57:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:57:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2021-01-06 16:57:57,475 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 24 [2021-01-06 16:57:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:57,475 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2021-01-06 16:57:57,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:57:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2021-01-06 16:57:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:57:57,476 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:57,476 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:57,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 16:57:57,677 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:57,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1233489969, now seen corresponding path program 24 times [2021-01-06 16:57:57,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:57,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067312097] [2021-01-06 16:57:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:57:57,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067312097] [2021-01-06 16:57:57,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668468421] [2021-01-06 16:57:57,864 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 [2021-01-06 16:57:57,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:57:57,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:57:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:57:58,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:58,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:57:58,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330418202] [2021-01-06 16:57:58,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:57:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:57:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:57:58,006 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 14 states. [2021-01-06 16:57:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:58,349 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2021-01-06 16:57:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:57:58,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2021-01-06 16:57:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:58,351 INFO L225 Difference]: With dead ends: 106 [2021-01-06 16:57:58,351 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 16:57:58,351 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 [2021-01-06 16:57:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 16:57:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2021-01-06 16:57:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 16:57:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2021-01-06 16:57:58,359 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 24 [2021-01-06 16:57:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:58,359 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2021-01-06 16:57:58,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:57:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2021-01-06 16:57:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:57:58,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:58,360 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:58,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:58,567 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash 675333039, now seen corresponding path program 25 times [2021-01-06 16:57:58,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:58,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760439137] [2021-01-06 16:57:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:58,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760439137] [2021-01-06 16:57:58,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913647510] [2021-01-06 16:57:58,817 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 [2021-01-06 16:57:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:57:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:57:58,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:58,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:57:58,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525685757] [2021-01-06 16:57:58,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:57:58,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:58,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:57:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:57:58,949 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand 18 states. [2021-01-06 16:57:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:59,459 INFO L93 Difference]: Finished difference Result 135 states and 188 transitions. [2021-01-06 16:57:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:57:59,460 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2021-01-06 16:57:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:59,462 INFO L225 Difference]: With dead ends: 135 [2021-01-06 16:57:59,462 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 16:57:59,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:57:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 16:57:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2021-01-06 16:57:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 16:57:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-01-06 16:57:59,472 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 24 [2021-01-06 16:57:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:59,472 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-01-06 16:57:59,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:57:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-01-06 16:57:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:57:59,473 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:59,473 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:59,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:57:59,686 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:59,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1548087805, now seen corresponding path program 26 times [2021-01-06 16:57:59,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:59,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620793896] [2021-01-06 16:57:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:57:59,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620793896] [2021-01-06 16:57:59,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693493761] [2021-01-06 16:57:59,867 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 [2021-01-06 16:57:59,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:57:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:57:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:58:00,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:00,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-01-06 16:58:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710369597] [2021-01-06 16:58:00,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:58:00,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:58:00,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:58:00,109 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand 20 states. [2021-01-06 16:58:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:00,244 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2021-01-06 16:58:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:58:00,244 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2021-01-06 16:58:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:00,245 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:58:00,245 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:58:00,246 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 [2021-01-06 16:58:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:58:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-01-06 16:58:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 16:58:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2021-01-06 16:58:00,254 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 25 [2021-01-06 16:58:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:00,254 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2021-01-06 16:58:00,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:58:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2021-01-06 16:58:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:58:00,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:00,255 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:00,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:58:00,470 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1733088651, now seen corresponding path program 27 times [2021-01-06 16:58:00,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:00,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671180698] [2021-01-06 16:58:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:00,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671180698] [2021-01-06 16:58:00,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525627038] [2021-01-06 16:58:00,673 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 [2021-01-06 16:58:00,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:58:00,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:00,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:58:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:00,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:00,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-01-06 16:58:00,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627971853] [2021-01-06 16:58:00,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:58:00,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:00,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:58:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:58:00,965 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 19 states. [2021-01-06 16:58:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:01,143 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2021-01-06 16:58:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:58:01,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2021-01-06 16:58:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:01,145 INFO L225 Difference]: With dead ends: 105 [2021-01-06 16:58:01,145 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:58:01,145 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 [2021-01-06 16:58:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:58:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2021-01-06 16:58:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:58:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2021-01-06 16:58:01,153 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 25 [2021-01-06 16:58:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:01,153 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2021-01-06 16:58:01,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:58:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2021-01-06 16:58:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:58:01,154 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:01,154 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:01,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:58:01,370 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:01,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1209974787, now seen corresponding path program 28 times [2021-01-06 16:58:01,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:01,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627046347] [2021-01-06 16:58:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:01,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627046347] [2021-01-06 16:58:01,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812136437] [2021-01-06 16:58:01,525 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 [2021-01-06 16:58:01,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:01,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:58:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:01,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:01,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:58:01,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277474781] [2021-01-06 16:58:01,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:58:01,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:01,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:58:01,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:58:01,634 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 14 states. [2021-01-06 16:58:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:01,900 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2021-01-06 16:58:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:58:01,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2021-01-06 16:58:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:01,902 INFO L225 Difference]: With dead ends: 108 [2021-01-06 16:58:01,903 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:58:01,903 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 [2021-01-06 16:58:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:58:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-01-06 16:58:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 16:58:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2021-01-06 16:58:01,911 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 25 [2021-01-06 16:58:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:01,911 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2021-01-06 16:58:01,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:58:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2021-01-06 16:58:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:58:01,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:01,912 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:02,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:58:02,127 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash 967527124, now seen corresponding path program 29 times [2021-01-06 16:58:02,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:02,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912884720] [2021-01-06 16:58:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:58:02,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912884720] [2021-01-06 16:58:02,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277909258] [2021-01-06 16:58:02,415 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 [2021-01-06 16:58:03,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 16:58:03,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:58:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:58:03,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:03,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 16:58:03,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274666850] [2021-01-06 16:58:03,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:58:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:03,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:58:03,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:58:03,258 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand 20 states. [2021-01-06 16:58:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:03,760 INFO L93 Difference]: Finished difference Result 136 states and 190 transitions. [2021-01-06 16:58:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:58:03,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2021-01-06 16:58:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:03,761 INFO L225 Difference]: With dead ends: 136 [2021-01-06 16:58:03,762 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 16:58:03,762 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 [2021-01-06 16:58:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 16:58:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2021-01-06 16:58:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 16:58:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-01-06 16:58:03,771 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 25 [2021-01-06 16:58:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:03,771 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-01-06 16:58:03,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:58:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-01-06 16:58:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:58:03,772 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:03,772 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:03,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:58:03,976 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -40778609, now seen corresponding path program 30 times [2021-01-06 16:58:03,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:03,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787068942] [2021-01-06 16:58:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:04,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787068942] [2021-01-06 16:58:04,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889202172] [2021-01-06 16:58:04,202 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 [2021-01-06 16:58:04,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:58:04,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:58:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:04,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:04,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-01-06 16:58:04,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048296010] [2021-01-06 16:58:04,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:58:04,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:04,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:58:04,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:58:04,547 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand 21 states. [2021-01-06 16:58:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:04,774 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2021-01-06 16:58:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:58:04,775 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2021-01-06 16:58:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:04,775 INFO L225 Difference]: With dead ends: 113 [2021-01-06 16:58:04,775 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:58:04,776 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 [2021-01-06 16:58:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:58:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2021-01-06 16:58:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 16:58:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-01-06 16:58:04,787 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 26 [2021-01-06 16:58:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:04,787 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-01-06 16:58:04,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:58:04,787 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-01-06 16:58:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:58:04,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:04,788 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:05,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:58:05,003 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash 886264063, now seen corresponding path program 31 times [2021-01-06 16:58:05,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:05,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392218767] [2021-01-06 16:58:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:05,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392218767] [2021-01-06 16:58:05,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700388597] [2021-01-06 16:58:05,184 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 [2021-01-06 16:58:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:58:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:05,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:05,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:58:05,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895119713] [2021-01-06 16:58:05,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:58:05,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:05,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:58:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:58:05,298 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 15 states. [2021-01-06 16:58:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:05,675 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2021-01-06 16:58:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:58:05,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2021-01-06 16:58:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:05,676 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:58:05,676 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 16:58:05,677 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 [2021-01-06 16:58:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 16:58:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2021-01-06 16:58:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 16:58:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2021-01-06 16:58:05,686 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 26 [2021-01-06 16:58:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:05,686 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2021-01-06 16:58:05,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:58:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2021-01-06 16:58:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:58:05,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:05,687 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:05,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:58:05,902 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1435609167, now seen corresponding path program 32 times [2021-01-06 16:58:05,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:05,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33079058] [2021-01-06 16:58:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:58:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33079058] [2021-01-06 16:58:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754342026] [2021-01-06 16:58:06,243 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 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 [2021-01-06 16:58:06,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:58:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:06,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:58:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:58:06,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:06,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:58:06,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633287192] [2021-01-06 16:58:06,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:58:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:58:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:58:06,362 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand 20 states. [2021-01-06 16:58:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:07,038 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2021-01-06 16:58:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:58:07,039 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2021-01-06 16:58:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:07,040 INFO L225 Difference]: With dead ends: 145 [2021-01-06 16:58:07,040 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 16:58:07,041 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 [2021-01-06 16:58:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 16:58:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 98. [2021-01-06 16:58:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 16:58:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2021-01-06 16:58:07,050 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 26 [2021-01-06 16:58:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:07,050 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2021-01-06 16:58:07,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:58:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2021-01-06 16:58:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:58:07,051 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:07,051 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:07,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:07,258 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:07,259 INFO L82 PathProgramCache]: Analyzing trace with hash 881225141, now seen corresponding path program 33 times [2021-01-06 16:58:07,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:07,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322808426] [2021-01-06 16:58:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:07,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322808426] [2021-01-06 16:58:07,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805587711] [2021-01-06 16:58:07,403 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 [2021-01-06 16:58:07,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:58:07,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:58:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:07,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:58:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:07,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:07,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:58:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186550456] [2021-01-06 16:58:07,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:58:07,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:58:07,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:58:07,579 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand 11 states. [2021-01-06 16:58:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:07,827 INFO L93 Difference]: Finished difference Result 251 states and 320 transitions. [2021-01-06 16:58:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:58:07,828 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2021-01-06 16:58:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:07,829 INFO L225 Difference]: With dead ends: 251 [2021-01-06 16:58:07,829 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 16:58:07,830 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 [2021-01-06 16:58:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 16:58:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 102. [2021-01-06 16:58:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 16:58:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-01-06 16:58:07,841 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 27 [2021-01-06 16:58:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:07,841 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-01-06 16:58:07,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:58:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-01-06 16:58:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:58:07,842 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:07,842 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:08,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:08,056 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash -558833789, now seen corresponding path program 34 times [2021-01-06 16:58:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:08,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671359462] [2021-01-06 16:58:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671359462] [2021-01-06 16:58:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868044529] [2021-01-06 16:58:08,269 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 [2021-01-06 16:58:08,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:08,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:58:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:08,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:08,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:58:08,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239514818] [2021-01-06 16:58:08,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:58:08,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:58:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:58:08,381 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand 16 states. [2021-01-06 16:58:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:08,810 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2021-01-06 16:58:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:58:08,810 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2021-01-06 16:58:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:08,811 INFO L225 Difference]: With dead ends: 127 [2021-01-06 16:58:08,811 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 16:58:08,812 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 [2021-01-06 16:58:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 16:58:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2021-01-06 16:58:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:58:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2021-01-06 16:58:08,826 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 27 [2021-01-06 16:58:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:08,827 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2021-01-06 16:58:08,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:58:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2021-01-06 16:58:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:58:08,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:08,828 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:09,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:09,041 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash 481819573, now seen corresponding path program 35 times [2021-01-06 16:58:09,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:09,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125316396] [2021-01-06 16:58:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:09,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125316396] [2021-01-06 16:58:09,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279649053] [2021-01-06 16:58:09,245 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 [2021-01-06 16:58:09,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:58:09,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:58:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:10,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:10,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-01-06 16:58:10,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495515531] [2021-01-06 16:58:10,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:58:10,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:58:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:58:10,142 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand 18 states. [2021-01-06 16:58:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:10,495 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2021-01-06 16:58:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:58:10,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2021-01-06 16:58:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:10,497 INFO L225 Difference]: With dead ends: 130 [2021-01-06 16:58:10,498 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 16:58:10,498 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 [2021-01-06 16:58:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 16:58:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2021-01-06 16:58:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 16:58:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 135 transitions. [2021-01-06 16:58:10,508 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 135 transitions. Word has length 27 [2021-01-06 16:58:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:10,508 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 135 transitions. [2021-01-06 16:58:10,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:58:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 135 transitions. [2021-01-06 16:58:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:58:10,509 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:10,509 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:10,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 16:58:10,713 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1233716684, now seen corresponding path program 36 times [2021-01-06 16:58:10,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:10,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734090299] [2021-01-06 16:58:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:58:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734090299] [2021-01-06 16:58:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644965977] [2021-01-06 16:58:11,068 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 [2021-01-06 16:58:11,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 16:58:11,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:11,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:58:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-01-06 16:58:11,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:11,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2021-01-06 16:58:11,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755200127] [2021-01-06 16:58:11,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:58:11,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:11,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:58:11,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:58:11,261 INFO L87 Difference]: Start difference. First operand 104 states and 135 transitions. Second operand 24 states. [2021-01-06 16:58:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:12,826 INFO L93 Difference]: Finished difference Result 167 states and 235 transitions. [2021-01-06 16:58:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:58:12,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2021-01-06 16:58:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:12,829 INFO L225 Difference]: With dead ends: 167 [2021-01-06 16:58:12,829 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 16:58:12,830 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 [2021-01-06 16:58:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 16:58:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-01-06 16:58:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 16:58:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2021-01-06 16:58:12,843 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 27 [2021-01-06 16:58:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:12,843 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2021-01-06 16:58:12,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:58:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2021-01-06 16:58:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:58:12,844 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:12,844 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:13,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:13,058 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -601429681, now seen corresponding path program 37 times [2021-01-06 16:58:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:13,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267906594] [2021-01-06 16:58:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:13,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267906594] [2021-01-06 16:58:13,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14804758] [2021-01-06 16:58:13,313 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 [2021-01-06 16:58:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:58:13,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 16:58:13,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:13,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-01-06 16:58:13,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258599689] [2021-01-06 16:58:13,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:58:13,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:58:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:58:13,629 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 23 states. [2021-01-06 16:58:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:13,868 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2021-01-06 16:58:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:58:13,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2021-01-06 16:58:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:13,870 INFO L225 Difference]: With dead ends: 120 [2021-01-06 16:58:13,870 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 16:58:13,870 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 [2021-01-06 16:58:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 16:58:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-01-06 16:58:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 16:58:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2021-01-06 16:58:13,879 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 28 [2021-01-06 16:58:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:13,879 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2021-01-06 16:58:13,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:58:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2021-01-06 16:58:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:58:13,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:13,880 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:14,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:14,094 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1887773055, now seen corresponding path program 38 times [2021-01-06 16:58:14,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:14,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162269093] [2021-01-06 16:58:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:14,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162269093] [2021-01-06 16:58:14,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163643117] [2021-01-06 16:58:14,309 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 [2021-01-06 16:58:14,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:58:14,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:14,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:58:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:14,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:14,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-01-06 16:58:14,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557542952] [2021-01-06 16:58:14,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:58:14,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:58:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:58:14,585 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand 22 states. [2021-01-06 16:58:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:14,927 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2021-01-06 16:58:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:58:14,928 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2021-01-06 16:58:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:14,929 INFO L225 Difference]: With dead ends: 125 [2021-01-06 16:58:14,929 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 16:58:14,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:58:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 16:58:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-01-06 16:58:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:58:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2021-01-06 16:58:14,939 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 28 [2021-01-06 16:58:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:14,939 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 131 transitions. [2021-01-06 16:58:14,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:58:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 131 transitions. [2021-01-06 16:58:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:58:14,940 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:14,940 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:15,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:58:15,153 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 561324815, now seen corresponding path program 39 times [2021-01-06 16:58:15,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:15,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908913331] [2021-01-06 16:58:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:15,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908913331] [2021-01-06 16:58:15,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276899383] [2021-01-06 16:58:15,376 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 [2021-01-06 16:58:15,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 16:58:15,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:15,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:58:15,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:15,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:15,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:58:15,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685710044] [2021-01-06 16:58:15,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:58:15,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:58:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:58:15,676 INFO L87 Difference]: Start difference. First operand 101 states and 131 transitions. Second operand 16 states. [2021-01-06 16:58:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:16,060 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2021-01-06 16:58:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:58:16,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2021-01-06 16:58:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:16,062 INFO L225 Difference]: With dead ends: 128 [2021-01-06 16:58:16,062 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 16:58:16,064 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 [2021-01-06 16:58:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 16:58:16,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2021-01-06 16:58:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 16:58:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2021-01-06 16:58:16,073 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 28 [2021-01-06 16:58:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:16,073 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2021-01-06 16:58:16,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:58:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2021-01-06 16:58:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:58:16,074 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:16,074 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:16,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 16:58:16,277 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash -975611042, now seen corresponding path program 40 times [2021-01-06 16:58:16,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:16,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272290917] [2021-01-06 16:58:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:58:16,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272290917] [2021-01-06 16:58:16,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498432357] [2021-01-06 16:58:16,664 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 [2021-01-06 16:58:16,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:58:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:58:16,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:16,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:58:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154764704] [2021-01-06 16:58:16,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:58:16,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:58:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:58:16,786 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 23 states. [2021-01-06 16:58:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:17,714 INFO L93 Difference]: Finished difference Result 163 states and 230 transitions. [2021-01-06 16:58:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:58:17,715 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2021-01-06 16:58:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:17,716 INFO L225 Difference]: With dead ends: 163 [2021-01-06 16:58:17,716 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 16:58:17,717 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 [2021-01-06 16:58:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 16:58:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-01-06 16:58:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 16:58:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2021-01-06 16:58:17,727 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 28 [2021-01-06 16:58:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:17,727 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2021-01-06 16:58:17,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:58:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2021-01-06 16:58:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:58:17,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:17,728 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:17,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:58:17,942 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash 423173891, now seen corresponding path program 41 times [2021-01-06 16:58:17,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:17,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516513670] [2021-01-06 16:58:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:18,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516513670] [2021-01-06 16:58:18,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283346507] [2021-01-06 16:58:18,208 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 [2021-01-06 16:58:18,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:58:18,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:18,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:58:18,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:19,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:19,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-01-06 16:58:19,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421086693] [2021-01-06 16:58:19,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:58:19,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:58:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:58:19,173 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 24 states. [2021-01-06 16:58:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:19,456 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2021-01-06 16:58:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:58:19,456 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2021-01-06 16:58:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:19,457 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:58:19,457 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 16:58:19,457 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 [2021-01-06 16:58:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 16:58:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-01-06 16:58:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 16:58:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2021-01-06 16:58:19,465 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 29 [2021-01-06 16:58:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:19,465 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2021-01-06 16:58:19,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:58:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2021-01-06 16:58:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:58:19,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:19,466 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:19,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:19,670 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1268979979, now seen corresponding path program 42 times [2021-01-06 16:58:19,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:19,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642810825] [2021-01-06 16:58:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:19,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642810825] [2021-01-06 16:58:19,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112360679] [2021-01-06 16:58:19,891 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 [2021-01-06 16:58:20,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 16:58:20,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:20,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:58:20,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:20,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:20,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:58:20,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944950837] [2021-01-06 16:58:20,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:58:20,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:58:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:58:20,073 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 17 states. [2021-01-06 16:58:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:20,546 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2021-01-06 16:58:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:58:20,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2021-01-06 16:58:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:20,550 INFO L225 Difference]: With dead ends: 137 [2021-01-06 16:58:20,550 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 16:58:20,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:58:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 16:58:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2021-01-06 16:58:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:58:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 143 transitions. [2021-01-06 16:58:20,561 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 143 transitions. Word has length 29 [2021-01-06 16:58:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:20,561 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 143 transitions. [2021-01-06 16:58:20,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:58:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 143 transitions. [2021-01-06 16:58:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:58:20,562 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:20,562 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:20,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:20,777 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 926503171, now seen corresponding path program 43 times [2021-01-06 16:58:20,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:20,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194692226] [2021-01-06 16:58:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:20,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194692226] [2021-01-06 16:58:20,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803067286] [2021-01-06 16:58:20,986 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 [2021-01-06 16:58:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:21,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:58:21,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:21,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:21,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:58:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159015424] [2021-01-06 16:58:21,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:58:21,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:58:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:58:21,097 INFO L87 Difference]: Start difference. First operand 111 states and 143 transitions. Second operand 16 states. [2021-01-06 16:58:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:21,493 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2021-01-06 16:58:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:58:21,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2021-01-06 16:58:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:21,495 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:58:21,495 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 16:58:21,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:58:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 16:58:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-01-06 16:58:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 16:58:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2021-01-06 16:58:21,504 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 29 [2021-01-06 16:58:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:21,504 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2021-01-06 16:58:21,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:58:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2021-01-06 16:58:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:58:21,505 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:21,505 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:21,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:21,718 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:21,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2102278141, now seen corresponding path program 44 times [2021-01-06 16:58:21,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:21,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808180480] [2021-01-06 16:58:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:58:22,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808180480] [2021-01-06 16:58:22,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158370678] [2021-01-06 16:58:22,187 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 [2021-01-06 16:58:22,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:58:22,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:22,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:58:22,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:58:22,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:22,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:58:22,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654159693] [2021-01-06 16:58:22,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:58:22,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:58:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:58:22,325 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand 24 states. [2021-01-06 16:58:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:23,353 INFO L93 Difference]: Finished difference Result 174 states and 244 transitions. [2021-01-06 16:58:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:58:23,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2021-01-06 16:58:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:23,355 INFO L225 Difference]: With dead ends: 174 [2021-01-06 16:58:23,355 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:58:23,355 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 [2021-01-06 16:58:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:58:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 119. [2021-01-06 16:58:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:58:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2021-01-06 16:58:23,366 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 29 [2021-01-06 16:58:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:23,366 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2021-01-06 16:58:23,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:58:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2021-01-06 16:58:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:58:23,366 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:23,367 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:23,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:23,581 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2029727233, now seen corresponding path program 45 times [2021-01-06 16:58:23,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:23,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54637929] [2021-01-06 16:58:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54637929] [2021-01-06 16:58:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547111170] [2021-01-06 16:58:23,761 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 [2021-01-06 16:58:23,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 16:58:23,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:58:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:23,993 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:58:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:24,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:24,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:58:24,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108708087] [2021-01-06 16:58:24,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:58:24,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:24,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:58:24,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:58:24,015 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand 12 states. [2021-01-06 16:58:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:24,312 INFO L93 Difference]: Finished difference Result 322 states and 412 transitions. [2021-01-06 16:58:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:58:24,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2021-01-06 16:58:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:24,314 INFO L225 Difference]: With dead ends: 322 [2021-01-06 16:58:24,315 INFO L226 Difference]: Without dead ends: 310 [2021-01-06 16:58:24,315 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 [2021-01-06 16:58:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-01-06 16:58:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 123. [2021-01-06 16:58:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 16:58:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2021-01-06 16:58:24,328 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 30 [2021-01-06 16:58:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:24,329 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2021-01-06 16:58:24,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:58:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2021-01-06 16:58:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:58:24,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:24,329 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:24,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:58:24,546 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2121113551, now seen corresponding path program 46 times [2021-01-06 16:58:24,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:24,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585158843] [2021-01-06 16:58:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:24,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585158843] [2021-01-06 16:58:24,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151633131] [2021-01-06 16:58:24,815 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 [2021-01-06 16:58:24,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:58:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:24,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:24,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:58:24,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6831314] [2021-01-06 16:58:24,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:58:24,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:24,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:58:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:58:24,941 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand 18 states. [2021-01-06 16:58:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:25,548 INFO L93 Difference]: Finished difference Result 150 states and 185 transitions. [2021-01-06 16:58:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:58:25,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2021-01-06 16:58:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:25,550 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:58:25,550 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 16:58:25,550 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 [2021-01-06 16:58:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 16:58:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 124. [2021-01-06 16:58:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 16:58:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2021-01-06 16:58:25,559 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 30 [2021-01-06 16:58:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:25,559 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2021-01-06 16:58:25,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:58:25,559 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2021-01-06 16:58:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:58:25,560 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:25,560 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:25,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:25,761 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash -344076225, now seen corresponding path program 47 times [2021-01-06 16:58:25,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:25,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106354243] [2021-01-06 16:58:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106354243] [2021-01-06 16:58:25,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774426234] [2021-01-06 16:58:25,979 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 [2021-01-06 16:58:26,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:58:26,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:58:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:26,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:26,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:58:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3951507] [2021-01-06 16:58:26,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:58:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:58:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:58:26,733 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand 17 states. [2021-01-06 16:58:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:27,251 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2021-01-06 16:58:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:58:27,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2021-01-06 16:58:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:27,253 INFO L225 Difference]: With dead ends: 153 [2021-01-06 16:58:27,253 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 16:58:27,254 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 [2021-01-06 16:58:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 16:58:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2021-01-06 16:58:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 16:58:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2021-01-06 16:58:27,266 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 30 [2021-01-06 16:58:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:27,266 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2021-01-06 16:58:27,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:58:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2021-01-06 16:58:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:58:27,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:27,267 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:27,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:58:27,468 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1625747454, now seen corresponding path program 48 times [2021-01-06 16:58:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:27,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091952111] [2021-01-06 16:58:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:58:27,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091952111] [2021-01-06 16:58:27,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096087944] [2021-01-06 16:58:27,912 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 [2021-01-06 16:58:27,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 16:58:27,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:58:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-01-06 16:58:28,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:28,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6] total 28 [2021-01-06 16:58:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453108854] [2021-01-06 16:58:28,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:58:28,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:58:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:58:28,200 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand 28 states. [2021-01-06 16:58:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:30,394 INFO L93 Difference]: Finished difference Result 211 states and 301 transitions. [2021-01-06 16:58:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:58:30,394 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2021-01-06 16:58:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:30,395 INFO L225 Difference]: With dead ends: 211 [2021-01-06 16:58:30,395 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 16:58:30,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:58:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 16:58:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2021-01-06 16:58:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:58:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2021-01-06 16:58:30,410 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 30 [2021-01-06 16:58:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:30,410 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2021-01-06 16:58:30,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:58:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2021-01-06 16:58:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:58:30,411 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:30,411 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:30,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:58:30,624 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash -760250749, now seen corresponding path program 49 times [2021-01-06 16:58:30,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:30,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366265988] [2021-01-06 16:58:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:30,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366265988] [2021-01-06 16:58:30,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475723291] [2021-01-06 16:58:30,912 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 [2021-01-06 16:58:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:58:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 16:58:31,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:31,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-01-06 16:58:31,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277419218] [2021-01-06 16:58:31,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:58:31,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:31,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:58:31,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:58:31,308 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand 26 states. [2021-01-06 16:58:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:31,610 INFO L93 Difference]: Finished difference Result 149 states and 185 transitions. [2021-01-06 16:58:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:58:31,611 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2021-01-06 16:58:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:31,611 INFO L225 Difference]: With dead ends: 149 [2021-01-06 16:58:31,612 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 16:58:31,612 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 [2021-01-06 16:58:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 16:58:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-01-06 16:58:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:58:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2021-01-06 16:58:31,622 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 31 [2021-01-06 16:58:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:31,622 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2021-01-06 16:58:31,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:58:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2021-01-06 16:58:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:58:31,623 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:31,623 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:31,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:31,839 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash -160169419, now seen corresponding path program 50 times [2021-01-06 16:58:31,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:31,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119766633] [2021-01-06 16:58:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:32,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119766633] [2021-01-06 16:58:32,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441419699] [2021-01-06 16:58:32,105 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 [2021-01-06 16:58:32,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:58:32,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:58:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:32,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:32,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2021-01-06 16:58:32,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379401061] [2021-01-06 16:58:32,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:58:32,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:58:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:58:32,447 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand 25 states. [2021-01-06 16:58:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:32,912 INFO L93 Difference]: Finished difference Result 154 states and 188 transitions. [2021-01-06 16:58:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:58:32,912 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 31 [2021-01-06 16:58:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:32,913 INFO L225 Difference]: With dead ends: 154 [2021-01-06 16:58:32,913 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 16:58:32,914 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 [2021-01-06 16:58:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 16:58:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2021-01-06 16:58:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 16:58:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 163 transitions. [2021-01-06 16:58:32,925 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 163 transitions. Word has length 31 [2021-01-06 16:58:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:32,925 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 163 transitions. [2021-01-06 16:58:32,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:58:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 163 transitions. [2021-01-06 16:58:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:58:32,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:32,926 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:33,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:58:33,141 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1077331837, now seen corresponding path program 51 times [2021-01-06 16:58:33,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:33,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674202629] [2021-01-06 16:58:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:33,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674202629] [2021-01-06 16:58:33,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52236488] [2021-01-06 16:58:33,396 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 [2021-01-06 16:58:33,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:58:33,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:58:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:33,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:33,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 22 [2021-01-06 16:58:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700071153] [2021-01-06 16:58:33,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:58:33,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:58:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:58:33,998 INFO L87 Difference]: Start difference. First operand 128 states and 163 transitions. Second operand 22 states. [2021-01-06 16:58:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:34,582 INFO L93 Difference]: Finished difference Result 157 states and 191 transitions. [2021-01-06 16:58:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:58:34,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2021-01-06 16:58:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:34,584 INFO L225 Difference]: With dead ends: 157 [2021-01-06 16:58:34,584 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 16:58:34,584 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 [2021-01-06 16:58:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 16:58:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2021-01-06 16:58:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 16:58:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 164 transitions. [2021-01-06 16:58:34,597 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 164 transitions. Word has length 31 [2021-01-06 16:58:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:34,597 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 164 transitions. [2021-01-06 16:58:34,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:58:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 164 transitions. [2021-01-06 16:58:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:58:34,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:34,598 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:34,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:34,801 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1736830923, now seen corresponding path program 52 times [2021-01-06 16:58:34,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:34,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251389339] [2021-01-06 16:58:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:35,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251389339] [2021-01-06 16:58:35,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346810587] [2021-01-06 16:58:35,020 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 [2021-01-06 16:58:35,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:35,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:35,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:58:35,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:35,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:35,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:58:35,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801858553] [2021-01-06 16:58:35,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:58:35,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:35,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:58:35,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:58:35,136 INFO L87 Difference]: Start difference. First operand 129 states and 164 transitions. Second operand 17 states. [2021-01-06 16:58:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:35,530 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-01-06 16:58:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:58:35,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2021-01-06 16:58:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:35,532 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:58:35,532 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 16:58:35,532 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 [2021-01-06 16:58:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 16:58:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 130. [2021-01-06 16:58:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 16:58:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2021-01-06 16:58:35,545 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 31 [2021-01-06 16:58:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:35,545 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2021-01-06 16:58:35,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:58:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2021-01-06 16:58:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:58:35,546 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:35,546 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:35,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-01-06 16:58:35,760 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2134502543, now seen corresponding path program 53 times [2021-01-06 16:58:35,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:35,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834527196] [2021-01-06 16:58:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:36,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834527196] [2021-01-06 16:58:36,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913890203] [2021-01-06 16:58:36,089 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 [2021-01-06 16:58:37,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:58:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:37,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:58:37,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:38,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:38,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-01-06 16:58:38,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195839629] [2021-01-06 16:58:38,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:58:38,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:38,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:58:38,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:58:38,021 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand 27 states. [2021-01-06 16:58:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:38,528 INFO L93 Difference]: Finished difference Result 157 states and 191 transitions. [2021-01-06 16:58:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:58:38,528 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2021-01-06 16:58:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:38,529 INFO L225 Difference]: With dead ends: 157 [2021-01-06 16:58:38,529 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 16:58:38,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:58:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 16:58:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2021-01-06 16:58:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:58:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2021-01-06 16:58:38,538 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 32 [2021-01-06 16:58:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:38,539 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2021-01-06 16:58:38,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:58:38,539 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2021-01-06 16:58:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:58:38,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:38,540 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:38,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:38,743 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1961547967, now seen corresponding path program 54 times [2021-01-06 16:58:38,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:38,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37493061] [2021-01-06 16:58:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:39,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37493061] [2021-01-06 16:58:39,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272739172] [2021-01-06 16:58:39,033 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 [2021-01-06 16:58:39,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 16:58:39,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:39,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:58:39,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:39,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:39,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2021-01-06 16:58:39,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177552122] [2021-01-06 16:58:39,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:58:39,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:58:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:58:39,513 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 24 states. [2021-01-06 16:58:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:40,179 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-01-06 16:58:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:58:40,180 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2021-01-06 16:58:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:40,181 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:58:40,181 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:58:40,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:58:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:58:40,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2021-01-06 16:58:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 16:58:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2021-01-06 16:58:40,194 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 32 [2021-01-06 16:58:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:40,194 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2021-01-06 16:58:40,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:58:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2021-01-06 16:58:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:58:40,195 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:40,195 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:40,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-01-06 16:58:40,399 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1444891057, now seen corresponding path program 55 times [2021-01-06 16:58:40,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:40,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429340741] [2021-01-06 16:58:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:40,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429340741] [2021-01-06 16:58:40,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675033135] [2021-01-06 16:58:40,647 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 [2021-01-06 16:58:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:58:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:40,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:40,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:58:40,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329238101] [2021-01-06 16:58:40,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:58:40,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:58:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:58:40,775 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 18 states. [2021-01-06 16:58:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:41,342 INFO L93 Difference]: Finished difference Result 163 states and 197 transitions. [2021-01-06 16:58:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:58:41,343 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2021-01-06 16:58:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:41,344 INFO L225 Difference]: With dead ends: 163 [2021-01-06 16:58:41,344 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 16:58:41,345 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 [2021-01-06 16:58:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 16:58:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2021-01-06 16:58:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 16:58:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2021-01-06 16:58:41,361 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 32 [2021-01-06 16:58:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:41,361 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2021-01-06 16:58:41,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:58:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2021-01-06 16:58:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:58:41,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:41,362 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:41,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:41,577 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash 254889333, now seen corresponding path program 56 times [2021-01-06 16:58:41,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:41,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029279294] [2021-01-06 16:58:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:41,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029279294] [2021-01-06 16:58:41,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980201449] [2021-01-06 16:58:41,769 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 [2021-01-06 16:58:41,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:58:41,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:41,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:58:41,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:41,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:58:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:41,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:41,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:58:41,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30286488] [2021-01-06 16:58:41,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:58:41,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:41,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:58:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:58:41,898 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand 13 states. [2021-01-06 16:58:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:42,264 INFO L93 Difference]: Finished difference Result 364 states and 462 transitions. [2021-01-06 16:58:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:58:42,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2021-01-06 16:58:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:42,267 INFO L225 Difference]: With dead ends: 364 [2021-01-06 16:58:42,267 INFO L226 Difference]: Without dead ends: 351 [2021-01-06 16:58:42,267 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 [2021-01-06 16:58:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-01-06 16:58:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 138. [2021-01-06 16:58:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 16:58:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2021-01-06 16:58:42,281 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 33 [2021-01-06 16:58:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:42,281 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2021-01-06 16:58:42,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:58:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2021-01-06 16:58:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:58:42,282 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:42,282 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:42,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-06 16:58:42,497 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1677541379, now seen corresponding path program 57 times [2021-01-06 16:58:42,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:42,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421777853] [2021-01-06 16:58:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:42,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421777853] [2021-01-06 16:58:42,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284165019] [2021-01-06 16:58:42,789 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 [2021-01-06 16:58:43,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:58:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:58:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:43,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:43,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-01-06 16:58:43,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022397982] [2021-01-06 16:58:43,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:58:43,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:58:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:58:43,674 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand 26 states. [2021-01-06 16:58:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:44,363 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2021-01-06 16:58:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:58:44,364 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2021-01-06 16:58:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:44,365 INFO L225 Difference]: With dead ends: 167 [2021-01-06 16:58:44,365 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 16:58:44,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:58:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 16:58:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2021-01-06 16:58:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 16:58:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2021-01-06 16:58:44,379 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 33 [2021-01-06 16:58:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:44,379 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2021-01-06 16:58:44,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:58:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2021-01-06 16:58:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:58:44,380 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:44,380 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:44,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:44,584 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash -984689803, now seen corresponding path program 58 times [2021-01-06 16:58:44,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:44,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149624868] [2021-01-06 16:58:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:44,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149624868] [2021-01-06 16:58:44,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545463544] [2021-01-06 16:58:44,856 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 [2021-01-06 16:58:44,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:58:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:44,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:44,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:58:44,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805282818] [2021-01-06 16:58:44,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:58:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:58:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:58:44,990 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand 19 states. [2021-01-06 16:58:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:45,712 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2021-01-06 16:58:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:58:45,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2021-01-06 16:58:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:45,714 INFO L225 Difference]: With dead ends: 170 [2021-01-06 16:58:45,714 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 16:58:45,714 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 [2021-01-06 16:58:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 16:58:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2021-01-06 16:58:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 16:58:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2021-01-06 16:58:45,728 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 33 [2021-01-06 16:58:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:45,728 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2021-01-06 16:58:45,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:58:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2021-01-06 16:58:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:58:45,729 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:45,729 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:45,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:58:45,943 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash 45675011, now seen corresponding path program 59 times [2021-01-06 16:58:45,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:45,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947108214] [2021-01-06 16:58:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:58:46,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947108214] [2021-01-06 16:58:46,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242191542] [2021-01-06 16:58:46,215 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 [2021-01-06 16:58:47,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:58:47,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:58:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:58:48,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:48,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2021-01-06 16:58:48,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507215539] [2021-01-06 16:58:48,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:58:48,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:58:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:58:48,246 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand 21 states. [2021-01-06 16:58:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:48,863 INFO L93 Difference]: Finished difference Result 173 states and 209 transitions. [2021-01-06 16:58:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:58:48,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2021-01-06 16:58:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:48,867 INFO L225 Difference]: With dead ends: 173 [2021-01-06 16:58:48,867 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 16:58:48,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:58:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 16:58:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2021-01-06 16:58:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 16:58:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 178 transitions. [2021-01-06 16:58:48,883 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 178 transitions. Word has length 33 [2021-01-06 16:58:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:48,884 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 178 transitions. [2021-01-06 16:58:48,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:58:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 178 transitions. [2021-01-06 16:58:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:58:48,884 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:48,884 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:49,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 16:58:49,088 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:49,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1374660867, now seen corresponding path program 60 times [2021-01-06 16:58:49,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:49,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050009725] [2021-01-06 16:58:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:58:49,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050009725] [2021-01-06 16:58:49,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202193426] [2021-01-06 16:58:49,633 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 [2021-01-06 16:58:49,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 16:58:49,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:58:49,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-01-06 16:58:50,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:50,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2021-01-06 16:58:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422453197] [2021-01-06 16:58:50,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:58:50,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:58:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:58:50,001 INFO L87 Difference]: Start difference. First operand 141 states and 178 transitions. Second operand 31 states. [2021-01-06 16:58:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:53,146 INFO L93 Difference]: Finished difference Result 246 states and 334 transitions. [2021-01-06 16:58:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:58:53,147 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2021-01-06 16:58:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:53,149 INFO L225 Difference]: With dead ends: 246 [2021-01-06 16:58:53,149 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 16:58:53,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=229, Invalid=4601, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:58:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 16:58:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2021-01-06 16:58:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 16:58:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2021-01-06 16:58:53,163 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 33 [2021-01-06 16:58:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:53,163 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2021-01-06 16:58:53,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:58:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2021-01-06 16:58:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:58:53,164 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:53,164 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:53,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 16:58:53,371 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2116421967, now seen corresponding path program 61 times [2021-01-06 16:58:53,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:53,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699233129] [2021-01-06 16:58:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699233129] [2021-01-06 16:58:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889845823] [2021-01-06 16:58:53,743 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 [2021-01-06 16:58:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:58:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:58:54,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:54,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2021-01-06 16:58:54,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940085865] [2021-01-06 16:58:54,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:58:54,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:54,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:58:54,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:58:54,217 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 29 states. [2021-01-06 16:58:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:54,532 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2021-01-06 16:58:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:58:54,533 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 34 [2021-01-06 16:58:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:54,534 INFO L225 Difference]: With dead ends: 164 [2021-01-06 16:58:54,534 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 16:58:54,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:58:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 16:58:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-01-06 16:58:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 16:58:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2021-01-06 16:58:54,544 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 34 [2021-01-06 16:58:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:54,544 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2021-01-06 16:58:54,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:58:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2021-01-06 16:58:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:58:54,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:54,545 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:54,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:54,754 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:54,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1463271743, now seen corresponding path program 62 times [2021-01-06 16:58:54,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:54,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073361104] [2021-01-06 16:58:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:55,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073361104] [2021-01-06 16:58:55,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911686257] [2021-01-06 16:58:55,130 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 [2021-01-06 16:58:55,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:58:55,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:58:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:58:55,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:55,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2021-01-06 16:58:55,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62495032] [2021-01-06 16:58:55,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:58:55,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:55,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:58:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:58:55,562 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 28 states. [2021-01-06 16:58:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:56,148 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2021-01-06 16:58:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:58:56,149 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 34 [2021-01-06 16:58:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:56,150 INFO L225 Difference]: With dead ends: 169 [2021-01-06 16:58:56,150 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 16:58:56,151 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 [2021-01-06 16:58:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 16:58:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2021-01-06 16:58:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 16:58:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 177 transitions. [2021-01-06 16:58:56,160 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 177 transitions. Word has length 34 [2021-01-06 16:58:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:56,160 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 177 transitions. [2021-01-06 16:58:56,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:58:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 177 transitions. [2021-01-06 16:58:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:58:56,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:56,161 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:56,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:56,365 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash 396647183, now seen corresponding path program 63 times [2021-01-06 16:58:56,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:56,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924331137] [2021-01-06 16:58:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924331137] [2021-01-06 16:58:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801952327] [2021-01-06 16:58:56,660 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 [2021-01-06 16:58:56,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:58:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:56,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:58:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:58:57,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:57,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:58:57,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854842705] [2021-01-06 16:58:57,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:58:57,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:58:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:58:57,026 INFO L87 Difference]: Start difference. First operand 141 states and 177 transitions. Second operand 20 states. [2021-01-06 16:58:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:57,687 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2021-01-06 16:58:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:58:57,688 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2021-01-06 16:58:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:57,689 INFO L225 Difference]: With dead ends: 172 [2021-01-06 16:58:57,689 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 16:58:57,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:58:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 16:58:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2021-01-06 16:58:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 16:58:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2021-01-06 16:58:57,704 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 34 [2021-01-06 16:58:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:57,705 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2021-01-06 16:58:57,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:58:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2021-01-06 16:58:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:58:57,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:57,705 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:57,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:58:57,909 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2123747457, now seen corresponding path program 64 times [2021-01-06 16:58:57,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:57,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104459819] [2021-01-06 16:58:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:58:58,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104459819] [2021-01-06 16:58:58,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060414122] [2021-01-06 16:58:58,218 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 [2021-01-06 16:58:58,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:58:58,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:58:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:58:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:58:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:58:58,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:58:58,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:58:58,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838865042] [2021-01-06 16:58:58,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:58:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:58:58,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:58:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:58:58,398 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand 19 states. [2021-01-06 16:58:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:58:59,003 INFO L93 Difference]: Finished difference Result 175 states and 210 transitions. [2021-01-06 16:58:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:58:59,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2021-01-06 16:58:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:58:59,005 INFO L225 Difference]: With dead ends: 175 [2021-01-06 16:58:59,005 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 16:58:59,005 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 [2021-01-06 16:58:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 16:58:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2021-01-06 16:58:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 16:58:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2021-01-06 16:58:59,019 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 34 [2021-01-06 16:58:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:58:59,020 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2021-01-06 16:58:59,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:58:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2021-01-06 16:58:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:58:59,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:58:59,020 INFO L422 BasicCegarLoop]: trace histogram [20, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:58:59,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-01-06 16:58:59,221 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:58:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:58:59,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1629205231, now seen corresponding path program 65 times [2021-01-06 16:58:59,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:58:59,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584067322] [2021-01-06 16:58:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:58:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:58:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:58:59,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584067322] [2021-01-06 16:58:59,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75337054] [2021-01-06 16:58:59,785 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 [2021-01-06 16:59:02,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 16:59:02,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:59:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:59:02,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:02,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 32 [2021-01-06 16:59:02,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030427701] [2021-01-06 16:59:02,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:59:02,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:02,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:59:02,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:59:02,625 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand 32 states. [2021-01-06 16:59:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:04,137 INFO L93 Difference]: Finished difference Result 224 states and 307 transitions. [2021-01-06 16:59:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:59:04,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2021-01-06 16:59:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:04,139 INFO L225 Difference]: With dead ends: 224 [2021-01-06 16:59:04,139 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 16:59:04,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:59:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 16:59:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 151. [2021-01-06 16:59:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 16:59:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2021-01-06 16:59:04,159 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 34 [2021-01-06 16:59:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:04,159 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2021-01-06 16:59:04,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:59:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2021-01-06 16:59:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:59:04,160 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:04,160 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:04,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:04,364 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:04,365 INFO L82 PathProgramCache]: Analyzing trace with hash -884119677, now seen corresponding path program 66 times [2021-01-06 16:59:04,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:04,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953934748] [2021-01-06 16:59:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:59:04,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953934748] [2021-01-06 16:59:04,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917345216] [2021-01-06 16:59:04,734 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 [2021-01-06 16:59:04,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 16:59:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:59:04,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:59:05,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:05,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-01-06 16:59:05,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54565323] [2021-01-06 16:59:05,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:59:05,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:05,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:59:05,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:59:05,354 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand 30 states. [2021-01-06 16:59:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:05,947 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2021-01-06 16:59:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:59:05,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2021-01-06 16:59:05,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:05,949 INFO L225 Difference]: With dead ends: 180 [2021-01-06 16:59:05,949 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:59:05,949 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 [2021-01-06 16:59:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:59:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-01-06 16:59:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 16:59:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 190 transitions. [2021-01-06 16:59:05,965 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 190 transitions. Word has length 35 [2021-01-06 16:59:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:05,965 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 190 transitions. [2021-01-06 16:59:05,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:59:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 190 transitions. [2021-01-06 16:59:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:59:05,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:05,966 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:06,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:06,180 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash 268420789, now seen corresponding path program 67 times [2021-01-06 16:59:06,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:06,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140817432] [2021-01-06 16:59:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:06,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140817432] [2021-01-06 16:59:06,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935572874] [2021-01-06 16:59:06,543 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 [2021-01-06 16:59:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:06,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:59:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:06,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:06,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:59:06,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249789136] [2021-01-06 16:59:06,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:59:06,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:06,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:59:06,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:59:06,676 INFO L87 Difference]: Start difference. First operand 152 states and 190 transitions. Second operand 21 states. [2021-01-06 16:59:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:07,487 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2021-01-06 16:59:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:59:07,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2021-01-06 16:59:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:07,489 INFO L225 Difference]: With dead ends: 183 [2021-01-06 16:59:07,489 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 16:59:07,489 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 [2021-01-06 16:59:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 16:59:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2021-01-06 16:59:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 16:59:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 191 transitions. [2021-01-06 16:59:07,504 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 191 transitions. Word has length 35 [2021-01-06 16:59:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:07,504 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 191 transitions. [2021-01-06 16:59:07,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:59:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2021-01-06 16:59:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:59:07,505 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:07,505 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:07,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:07,718 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash -656367229, now seen corresponding path program 68 times [2021-01-06 16:59:07,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:07,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212734455] [2021-01-06 16:59:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:08,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212734455] [2021-01-06 16:59:08,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035594673] [2021-01-06 16:59:08,032 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 [2021-01-06 16:59:08,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:08,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:08,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:59:08,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:08,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:08,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:59:08,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801604775] [2021-01-06 16:59:08,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:59:08,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:59:08,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:59:08,170 INFO L87 Difference]: Start difference. First operand 153 states and 191 transitions. Second operand 20 states. [2021-01-06 16:59:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:08,897 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2021-01-06 16:59:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:59:08,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2021-01-06 16:59:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:08,899 INFO L225 Difference]: With dead ends: 186 [2021-01-06 16:59:08,899 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 16:59:08,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:59:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 16:59:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2021-01-06 16:59:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 16:59:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 192 transitions. [2021-01-06 16:59:08,911 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 192 transitions. Word has length 35 [2021-01-06 16:59:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:08,911 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 192 transitions. [2021-01-06 16:59:08,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:59:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 192 transitions. [2021-01-06 16:59:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:59:08,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:08,911 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:09,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-06 16:59:09,125 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1431785428, now seen corresponding path program 69 times [2021-01-06 16:59:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:09,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93974073] [2021-01-06 16:59:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:59:09,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93974073] [2021-01-06 16:59:09,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528301790] [2021-01-06 16:59:09,791 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 [2021-01-06 16:59:09,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:59:09,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:59:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-01-06 16:59:10,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:10,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8] total 34 [2021-01-06 16:59:10,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746440498] [2021-01-06 16:59:10,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:59:10,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:59:10,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:59:10,181 INFO L87 Difference]: Start difference. First operand 154 states and 192 transitions. Second operand 34 states. [2021-01-06 16:59:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:14,511 INFO L93 Difference]: Finished difference Result 255 states and 350 transitions. [2021-01-06 16:59:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:59:14,512 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 35 [2021-01-06 16:59:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:14,513 INFO L225 Difference]: With dead ends: 255 [2021-01-06 16:59:14,513 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 16:59:14,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=786, Invalid=6354, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:59:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 16:59:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 166. [2021-01-06 16:59:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 16:59:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2021-01-06 16:59:14,528 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 35 [2021-01-06 16:59:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:14,528 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2021-01-06 16:59:14,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:59:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2021-01-06 16:59:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:59:14,529 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:14,529 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:14,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:14,730 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -638809665, now seen corresponding path program 70 times [2021-01-06 16:59:14,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:14,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049348160] [2021-01-06 16:59:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:59:14,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049348160] [2021-01-06 16:59:14,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221868514] [2021-01-06 16:59:14,968 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 [2021-01-06 16:59:15,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:15,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:15,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:59:15,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:15,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:59:15,080 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:59:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:59:15,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:15,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:59:15,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962393322] [2021-01-06 16:59:15,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:59:15,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:15,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:59:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:59:15,107 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand 14 states. [2021-01-06 16:59:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:15,543 INFO L93 Difference]: Finished difference Result 450 states and 567 transitions. [2021-01-06 16:59:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:59:15,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2021-01-06 16:59:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:15,550 INFO L225 Difference]: With dead ends: 450 [2021-01-06 16:59:15,550 INFO L226 Difference]: Without dead ends: 436 [2021-01-06 16:59:15,551 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 [2021-01-06 16:59:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-01-06 16:59:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 172. [2021-01-06 16:59:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 16:59:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2021-01-06 16:59:15,570 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 36 [2021-01-06 16:59:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:15,570 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2021-01-06 16:59:15,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:59:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2021-01-06 16:59:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:59:15,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:15,571 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:15,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:15,786 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash 588369871, now seen corresponding path program 71 times [2021-01-06 16:59:15,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:15,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492982770] [2021-01-06 16:59:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:16,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492982770] [2021-01-06 16:59:16,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239828423] [2021-01-06 16:59:16,207 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 [2021-01-06 16:59:18,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:59:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:59:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:18,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:59:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238722911] [2021-01-06 16:59:18,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:59:18,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:59:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:59:18,530 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand 22 states. [2021-01-06 16:59:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:19,422 INFO L93 Difference]: Finished difference Result 203 states and 243 transitions. [2021-01-06 16:59:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:59:19,423 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2021-01-06 16:59:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:19,424 INFO L225 Difference]: With dead ends: 203 [2021-01-06 16:59:19,424 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 16:59:19,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:59:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 16:59:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 173. [2021-01-06 16:59:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 16:59:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 214 transitions. [2021-01-06 16:59:19,442 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 214 transitions. Word has length 36 [2021-01-06 16:59:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:19,443 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 214 transitions. [2021-01-06 16:59:19,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:59:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 214 transitions. [2021-01-06 16:59:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:59:19,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:19,443 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:19,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 16:59:19,647 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1882746879, now seen corresponding path program 72 times [2021-01-06 16:59:19,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:19,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275255342] [2021-01-06 16:59:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:20,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275255342] [2021-01-06 16:59:20,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262879598] [2021-01-06 16:59:20,018 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 [2021-01-06 16:59:20,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:59:20,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:59:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:20,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:20,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:59:20,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591333872] [2021-01-06 16:59:20,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:59:20,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:59:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:59:20,443 INFO L87 Difference]: Start difference. First operand 173 states and 214 transitions. Second operand 21 states. [2021-01-06 16:59:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:21,452 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2021-01-06 16:59:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:59:21,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2021-01-06 16:59:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:21,455 INFO L225 Difference]: With dead ends: 206 [2021-01-06 16:59:21,455 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 16:59:21,455 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 [2021-01-06 16:59:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 16:59:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 174. [2021-01-06 16:59:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 16:59:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2021-01-06 16:59:21,468 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 36 [2021-01-06 16:59:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:21,469 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2021-01-06 16:59:21,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:59:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2021-01-06 16:59:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:59:21,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:21,469 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:21,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:21,670 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:21,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1059924367, now seen corresponding path program 73 times [2021-01-06 16:59:21,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:21,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163709418] [2021-01-06 16:59:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 16:59:22,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163709418] [2021-01-06 16:59:22,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387005396] [2021-01-06 16:59:22,026 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 [2021-01-06 16:59:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:22,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:59:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 16:59:22,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:22,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:59:22,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756886371] [2021-01-06 16:59:22,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:59:22,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:22,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:59:22,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:59:22,157 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand 20 states. [2021-01-06 16:59:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:22,961 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2021-01-06 16:59:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:59:22,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2021-01-06 16:59:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:22,963 INFO L225 Difference]: With dead ends: 209 [2021-01-06 16:59:22,964 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 16:59:22,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:59:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 16:59:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2021-01-06 16:59:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 16:59:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 216 transitions. [2021-01-06 16:59:22,979 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 216 transitions. Word has length 36 [2021-01-06 16:59:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:22,979 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 216 transitions. [2021-01-06 16:59:22,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:59:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 216 transitions. [2021-01-06 16:59:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:59:22,980 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:22,980 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:23,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:23,190 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1624133885, now seen corresponding path program 74 times [2021-01-06 16:59:23,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:23,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300977509] [2021-01-06 16:59:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:59:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300977509] [2021-01-06 16:59:23,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487766101] [2021-01-06 16:59:23,646 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 [2021-01-06 16:59:23,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:23,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:59:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 16:59:24,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:24,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2021-01-06 16:59:24,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959191695] [2021-01-06 16:59:24,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:59:24,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:59:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:59:24,204 INFO L87 Difference]: Start difference. First operand 175 states and 216 transitions. Second operand 32 states. [2021-01-06 16:59:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:24,628 INFO L93 Difference]: Finished difference Result 189 states and 229 transitions. [2021-01-06 16:59:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:59:24,629 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2021-01-06 16:59:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:24,630 INFO L225 Difference]: With dead ends: 189 [2021-01-06 16:59:24,631 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 16:59:24,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:59:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 16:59:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-01-06 16:59:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 16:59:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 202 transitions. [2021-01-06 16:59:24,641 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 202 transitions. Word has length 37 [2021-01-06 16:59:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:24,642 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 202 transitions. [2021-01-06 16:59:24,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:59:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 202 transitions. [2021-01-06 16:59:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:59:24,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:24,642 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:24,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:24,843 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1916856821, now seen corresponding path program 75 times [2021-01-06 16:59:24,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:24,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235882972] [2021-01-06 16:59:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235882972] [2021-01-06 16:59:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600900574] [2021-01-06 16:59:25,300 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 [2021-01-06 16:59:25,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:59:25,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:59:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:26,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:26,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2021-01-06 16:59:26,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909823631] [2021-01-06 16:59:26,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:59:26,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:59:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:59:26,238 INFO L87 Difference]: Start difference. First operand 163 states and 202 transitions. Second operand 31 states. [2021-01-06 16:59:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:26,856 INFO L93 Difference]: Finished difference Result 194 states and 232 transitions. [2021-01-06 16:59:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:59:26,857 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2021-01-06 16:59:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:26,858 INFO L225 Difference]: With dead ends: 194 [2021-01-06 16:59:26,858 INFO L226 Difference]: Without dead ends: 179 [2021-01-06 16:59:26,858 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 [2021-01-06 16:59:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-01-06 16:59:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2021-01-06 16:59:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 16:59:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2021-01-06 16:59:26,869 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 37 [2021-01-06 16:59:26,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:26,869 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2021-01-06 16:59:26,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:59:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2021-01-06 16:59:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:59:26,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:26,870 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:27,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:27,074 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:27,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1009094397, now seen corresponding path program 76 times [2021-01-06 16:59:27,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:27,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294632915] [2021-01-06 16:59:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:27,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294632915] [2021-01-06 16:59:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888080824] [2021-01-06 16:59:27,494 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 [2021-01-06 16:59:27,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:27,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:59:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:27,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:27,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:59:27,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221305406] [2021-01-06 16:59:27,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:59:27,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:59:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:59:27,646 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 22 states. [2021-01-06 16:59:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:28,570 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2021-01-06 16:59:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:59:28,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2021-01-06 16:59:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:28,572 INFO L225 Difference]: With dead ends: 197 [2021-01-06 16:59:28,572 INFO L226 Difference]: Without dead ends: 181 [2021-01-06 16:59:28,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:59:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-01-06 16:59:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 165. [2021-01-06 16:59:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 16:59:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2021-01-06 16:59:28,585 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 37 [2021-01-06 16:59:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:28,585 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2021-01-06 16:59:28,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:59:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2021-01-06 16:59:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:59:28,586 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:28,586 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:28,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:28,791 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:28,792 INFO L82 PathProgramCache]: Analyzing trace with hash 387248117, now seen corresponding path program 77 times [2021-01-06 16:59:28,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:28,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247494604] [2021-01-06 16:59:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 16:59:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247494604] [2021-01-06 16:59:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113552768] [2021-01-06 16:59:29,176 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 [2021-01-06 16:59:33,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:59:33,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:59:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 16:59:34,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:34,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 25 [2021-01-06 16:59:34,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975165921] [2021-01-06 16:59:34,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:59:34,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:34,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:59:34,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:59:34,307 INFO L87 Difference]: Start difference. First operand 165 states and 204 transitions. Second operand 25 states. [2021-01-06 16:59:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:35,244 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2021-01-06 16:59:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:59:35,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2021-01-06 16:59:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:35,246 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:59:35,246 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 16:59:35,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:59:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 16:59:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2021-01-06 16:59:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 16:59:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2021-01-06 16:59:35,264 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 37 [2021-01-06 16:59:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:35,265 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2021-01-06 16:59:35,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:59:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2021-01-06 16:59:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:59:35,265 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:35,266 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:35,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:35,470 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 150279311, now seen corresponding path program 78 times [2021-01-06 16:59:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:35,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527863712] [2021-01-06 16:59:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:35,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527863712] [2021-01-06 16:59:35,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807541720] [2021-01-06 16:59:35,914 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 [2021-01-06 16:59:36,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 16:59:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:36,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:59:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:37,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:37,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-01-06 16:59:37,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851338635] [2021-01-06 16:59:37,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:59:37,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:37,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:59:37,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:59:37,003 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand 33 states. [2021-01-06 16:59:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:37,684 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2021-01-06 16:59:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:59:37,684 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2021-01-06 16:59:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:37,685 INFO L225 Difference]: With dead ends: 197 [2021-01-06 16:59:37,685 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 16:59:37,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:59:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 16:59:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 167. [2021-01-06 16:59:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 16:59:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2021-01-06 16:59:37,697 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 38 [2021-01-06 16:59:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:37,697 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2021-01-06 16:59:37,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:59:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2021-01-06 16:59:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:59:37,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:37,698 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:37,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-01-06 16:59:37,899 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:37,899 INFO L82 PathProgramCache]: Analyzing trace with hash -461860737, now seen corresponding path program 79 times [2021-01-06 16:59:37,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:37,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125001824] [2021-01-06 16:59:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:38,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125001824] [2021-01-06 16:59:38,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198651741] [2021-01-06 16:59:38,367 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 [2021-01-06 16:59:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:59:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:38,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:38,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:59:38,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713035979] [2021-01-06 16:59:38,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:59:38,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:38,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:59:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:59:38,521 INFO L87 Difference]: Start difference. First operand 167 states and 206 transitions. Second operand 23 states. [2021-01-06 16:59:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:39,581 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2021-01-06 16:59:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:59:39,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2021-01-06 16:59:39,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:39,583 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:59:39,584 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 16:59:39,584 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 [2021-01-06 16:59:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 16:59:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2021-01-06 16:59:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 16:59:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 207 transitions. [2021-01-06 16:59:39,596 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 207 transitions. Word has length 38 [2021-01-06 16:59:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:39,596 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 207 transitions. [2021-01-06 16:59:39,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:59:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 207 transitions. [2021-01-06 16:59:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:59:39,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:39,597 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:39,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:39,798 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1009120847, now seen corresponding path program 80 times [2021-01-06 16:59:39,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:39,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359225106] [2021-01-06 16:59:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 16:59:40,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359225106] [2021-01-06 16:59:40,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144884044] [2021-01-06 16:59:40,209 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 [2021-01-06 16:59:40,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:40,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:40,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:59:40,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 16:59:40,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:40,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:59:40,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934148370] [2021-01-06 16:59:40,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:59:40,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:59:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:59:40,365 INFO L87 Difference]: Start difference. First operand 168 states and 207 transitions. Second operand 22 states. [2021-01-06 16:59:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:41,475 INFO L93 Difference]: Finished difference Result 203 states and 241 transitions. [2021-01-06 16:59:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:59:41,478 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2021-01-06 16:59:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:41,479 INFO L225 Difference]: With dead ends: 203 [2021-01-06 16:59:41,479 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:59:41,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:59:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:59:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 169. [2021-01-06 16:59:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 16:59:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2021-01-06 16:59:41,493 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 38 [2021-01-06 16:59:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:41,493 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2021-01-06 16:59:41,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:59:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2021-01-06 16:59:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:59:41,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:41,494 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:41,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-01-06 16:59:41,696 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:41,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1271426751, now seen corresponding path program 81 times [2021-01-06 16:59:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:41,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177646832] [2021-01-06 16:59:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 16:59:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177646832] [2021-01-06 16:59:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354167035] [2021-01-06 16:59:42,110 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 [2021-01-06 16:59:42,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 16:59:42,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:59:42,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-01-06 16:59:42,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:42,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2021-01-06 16:59:42,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360285099] [2021-01-06 16:59:42,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:59:42,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:42,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:59:42,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:59:42,834 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand 28 states. [2021-01-06 16:59:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:44,920 INFO L93 Difference]: Finished difference Result 242 states and 287 transitions. [2021-01-06 16:59:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:59:44,921 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 38 [2021-01-06 16:59:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:44,922 INFO L225 Difference]: With dead ends: 242 [2021-01-06 16:59:44,922 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 16:59:44,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=156, Invalid=2100, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:59:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 16:59:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 175. [2021-01-06 16:59:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 16:59:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2021-01-06 16:59:44,937 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 38 [2021-01-06 16:59:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:44,937 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2021-01-06 16:59:44,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:59:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2021-01-06 16:59:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:59:44,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:44,937 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:45,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-06 16:59:45,138 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:45,139 INFO L82 PathProgramCache]: Analyzing trace with hash -415208226, now seen corresponding path program 82 times [2021-01-06 16:59:45,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:45,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788599425] [2021-01-06 16:59:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:59:45,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788599425] [2021-01-06 16:59:45,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606151145] [2021-01-06 16:59:45,946 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 [2021-01-06 16:59:46,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:46,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:59:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:59:46,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:46,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:59:46,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478365682] [2021-01-06 16:59:46,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:59:46,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:59:46,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:59:46,127 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand 31 states. [2021-01-06 16:59:48,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:48,153 INFO L93 Difference]: Finished difference Result 265 states and 351 transitions. [2021-01-06 16:59:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:59:48,153 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2021-01-06 16:59:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:48,155 INFO L225 Difference]: With dead ends: 265 [2021-01-06 16:59:48,155 INFO L226 Difference]: Without dead ends: 255 [2021-01-06 16:59:48,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=139, Invalid=1931, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:59:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-01-06 16:59:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 184. [2021-01-06 16:59:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 16:59:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 224 transitions. [2021-01-06 16:59:48,170 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 224 transitions. Word has length 38 [2021-01-06 16:59:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:48,171 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 224 transitions. [2021-01-06 16:59:48,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:59:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 224 transitions. [2021-01-06 16:59:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:59:48,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:48,171 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:48,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:48,372 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1220951349, now seen corresponding path program 83 times [2021-01-06 16:59:48,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:48,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607854234] [2021-01-06 16:59:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 16:59:48,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607854234] [2021-01-06 16:59:48,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088510811] [2021-01-06 16:59:48,666 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 [2021-01-06 16:59:53,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:59:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:53,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 103 conjunts are in the unsatisfiable core [2021-01-06 16:59:53,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:55,327 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:59:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:55,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:55,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 36] total 41 [2021-01-06 16:59:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570926082] [2021-01-06 16:59:55,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:59:55,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:59:55,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:59:55,388 INFO L87 Difference]: Start difference. First operand 184 states and 224 transitions. Second operand 41 states. [2021-01-06 16:59:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:57,380 INFO L93 Difference]: Finished difference Result 496 states and 615 transitions. [2021-01-06 16:59:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:59:57,380 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 39 [2021-01-06 16:59:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:57,382 INFO L225 Difference]: With dead ends: 496 [2021-01-06 16:59:57,382 INFO L226 Difference]: Without dead ends: 479 [2021-01-06 16:59:57,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=152, Invalid=2298, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:59:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-01-06 16:59:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 190. [2021-01-06 16:59:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 16:59:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2021-01-06 16:59:57,406 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 39 [2021-01-06 16:59:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:57,407 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2021-01-06 16:59:57,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:59:57,407 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2021-01-06 16:59:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:59:57,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:57,407 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:57,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:57,611 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash -677486461, now seen corresponding path program 84 times [2021-01-06 16:59:57,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:57,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346849630] [2021-01-06 16:59:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:58,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346849630] [2021-01-06 16:59:58,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936919529] [2021-01-06 16:59:58,123 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 [2021-01-06 16:59:58,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:59:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:59:58,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 16:59:58,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:58,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:59:58,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753141399] [2021-01-06 16:59:58,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:59:58,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:58,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:59:58,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:59:58,649 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand 24 states. [2021-01-06 16:59:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:59,909 INFO L93 Difference]: Finished difference Result 223 states and 264 transitions. [2021-01-06 16:59:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:59:59,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2021-01-06 16:59:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:59,911 INFO L225 Difference]: With dead ends: 223 [2021-01-06 16:59:59,911 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 16:59:59,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:59:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 16:59:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-01-06 16:59:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 16:59:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2021-01-06 16:59:59,928 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 39 [2021-01-06 16:59:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:59,928 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2021-01-06 16:59:59,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:59:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2021-01-06 16:59:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:59:59,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:59,928 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:00,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:00,129 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1187661003, now seen corresponding path program 85 times [2021-01-06 17:00:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:00,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327514888] [2021-01-06 17:00:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:00,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327514888] [2021-01-06 17:00:00,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095753763] [2021-01-06 17:00:00,608 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 [2021-01-06 17:00:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:00:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:00,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:00,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 17:00:00,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576163912] [2021-01-06 17:00:00,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:00:00,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:00,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:00:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:00:00,769 INFO L87 Difference]: Start difference. First operand 191 states and 233 transitions. Second operand 23 states. [2021-01-06 17:00:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:02,083 INFO L93 Difference]: Finished difference Result 226 states and 267 transitions. [2021-01-06 17:00:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 17:00:02,084 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2021-01-06 17:00:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:02,085 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:00:02,085 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 17:00:02,085 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 [2021-01-06 17:00:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 17:00:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2021-01-06 17:00:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 17:00:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 234 transitions. [2021-01-06 17:00:02,101 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 234 transitions. Word has length 39 [2021-01-06 17:00:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:02,101 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 234 transitions. [2021-01-06 17:00:02,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:00:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 234 transitions. [2021-01-06 17:00:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:00:02,101 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:02,101 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:02,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-01-06 17:00:02,302 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash -850716029, now seen corresponding path program 86 times [2021-01-06 17:00:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:02,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386766748] [2021-01-06 17:00:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:02,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386766748] [2021-01-06 17:00:02,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181244447] [2021-01-06 17:00:02,747 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 [2021-01-06 17:00:02,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:02,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 17:00:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:02,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:02,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 17:00:02,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023968198] [2021-01-06 17:00:02,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:00:02,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:02,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:00:02,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:02,908 INFO L87 Difference]: Start difference. First operand 192 states and 234 transitions. Second operand 22 states. [2021-01-06 17:00:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:04,059 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2021-01-06 17:00:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 17:00:04,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2021-01-06 17:00:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:04,061 INFO L225 Difference]: With dead ends: 229 [2021-01-06 17:00:04,061 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 17:00:04,061 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 [2021-01-06 17:00:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 17:00:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 193. [2021-01-06 17:00:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2021-01-06 17:00:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2021-01-06 17:00:04,079 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 39 [2021-01-06 17:00:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:04,079 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2021-01-06 17:00:04,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:00:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2021-01-06 17:00:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:00:04,079 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:04,079 INFO L422 BasicCegarLoop]: trace histogram [23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:04,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:04,280 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash -387379389, now seen corresponding path program 87 times [2021-01-06 17:00:04,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:04,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573810883] [2021-01-06 17:00:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:00:05,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573810883] [2021-01-06 17:00:05,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443843355] [2021-01-06 17:00:05,124 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 [2021-01-06 17:00:05,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:00:05,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:05,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:00:05,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-01-06 17:00:05,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:05,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2021-01-06 17:00:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040786145] [2021-01-06 17:00:05,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:00:05,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:00:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:00:05,735 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand 39 states. [2021-01-06 17:00:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:13,372 INFO L93 Difference]: Finished difference Result 322 states and 432 transitions. [2021-01-06 17:00:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-01-06 17:00:13,373 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2021-01-06 17:00:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:13,375 INFO L225 Difference]: With dead ends: 322 [2021-01-06 17:00:13,375 INFO L226 Difference]: Without dead ends: 312 [2021-01-06 17:00:13,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1377, Invalid=11505, Unknown=0, NotChecked=0, Total=12882 [2021-01-06 17:00:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-01-06 17:00:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 206. [2021-01-06 17:00:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2021-01-06 17:00:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 249 transitions. [2021-01-06 17:00:13,393 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 249 transitions. Word has length 39 [2021-01-06 17:00:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:13,393 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 249 transitions. [2021-01-06 17:00:13,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:00:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 249 transitions. [2021-01-06 17:00:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:00:13,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:13,394 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:13,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-01-06 17:00:13,595 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:13,596 INFO L82 PathProgramCache]: Analyzing trace with hash 52046159, now seen corresponding path program 88 times [2021-01-06 17:00:13,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:13,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692831116] [2021-01-06 17:00:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 17:00:14,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692831116] [2021-01-06 17:00:14,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961222547] [2021-01-06 17:00:14,163 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 [2021-01-06 17:00:14,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:14,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 17:00:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 17:00:14,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:14,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2021-01-06 17:00:14,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992448012] [2021-01-06 17:00:14,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:00:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:00:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:00:14,878 INFO L87 Difference]: Start difference. First operand 206 states and 249 transitions. Second operand 35 states. [2021-01-06 17:00:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:15,355 INFO L93 Difference]: Finished difference Result 221 states and 263 transitions. [2021-01-06 17:00:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:00:15,356 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 40 [2021-01-06 17:00:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:15,357 INFO L225 Difference]: With dead ends: 221 [2021-01-06 17:00:15,357 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 17:00:15,357 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 [2021-01-06 17:00:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 17:00:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-01-06 17:00:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2021-01-06 17:00:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 234 transitions. [2021-01-06 17:00:15,377 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 234 transitions. Word has length 40 [2021-01-06 17:00:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:15,378 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 234 transitions. [2021-01-06 17:00:15,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:00:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 234 transitions. [2021-01-06 17:00:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:00:15,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:15,378 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:15,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:15,579 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1228050687, now seen corresponding path program 89 times [2021-01-06 17:00:15,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:15,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227216617] [2021-01-06 17:00:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:00:16,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227216617] [2021-01-06 17:00:16,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519168181] [2021-01-06 17:00:16,166 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 [2021-01-06 17:00:21,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:00:21,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 17:00:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:00:21,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:21,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2021-01-06 17:00:21,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675859032] [2021-01-06 17:00:21,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 17:00:21,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:21,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 17:00:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:00:21,745 INFO L87 Difference]: Start difference. First operand 193 states and 234 transitions. Second operand 34 states. [2021-01-06 17:00:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:22,537 INFO L93 Difference]: Finished difference Result 226 states and 266 transitions. [2021-01-06 17:00:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:00:22,538 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 40 [2021-01-06 17:00:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:22,539 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:00:22,539 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 17:00:22,540 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 [2021-01-06 17:00:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 17:00:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2021-01-06 17:00:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 17:00:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2021-01-06 17:00:22,562 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 40 [2021-01-06 17:00:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:22,562 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2021-01-06 17:00:22,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 17:00:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2021-01-06 17:00:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:00:22,562 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:22,562 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:22,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:22,763 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:22,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:22,764 INFO L82 PathProgramCache]: Analyzing trace with hash -568421617, now seen corresponding path program 90 times [2021-01-06 17:00:22,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:22,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232440726] [2021-01-06 17:00:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232440726] [2021-01-06 17:00:23,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805966218] [2021-01-06 17:00:23,302 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 [2021-01-06 17:00:23,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:23,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:00:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:23,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:23,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-01-06 17:00:23,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464025158] [2021-01-06 17:00:23,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:00:23,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:23,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:00:23,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:00:23,906 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand 25 states. [2021-01-06 17:00:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:25,124 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2021-01-06 17:00:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:00:25,125 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2021-01-06 17:00:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:25,126 INFO L225 Difference]: With dead ends: 229 [2021-01-06 17:00:25,126 INFO L226 Difference]: Without dead ends: 212 [2021-01-06 17:00:25,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-01-06 17:00:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2021-01-06 17:00:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 17:00:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2021-01-06 17:00:25,146 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 40 [2021-01-06 17:00:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:25,146 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2021-01-06 17:00:25,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:00:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2021-01-06 17:00:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:00:25,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:25,146 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:25,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-01-06 17:00:25,347 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:25,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2082334527, now seen corresponding path program 91 times [2021-01-06 17:00:25,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:25,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773345817] [2021-01-06 17:00:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:25,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773345817] [2021-01-06 17:00:25,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197757341] [2021-01-06 17:00:25,833 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 [2021-01-06 17:00:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:00:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:25,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:25,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 17:00:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441313150] [2021-01-06 17:00:25,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:00:25,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:00:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:00:26,000 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand 23 states. [2021-01-06 17:00:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:27,148 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2021-01-06 17:00:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:00:27,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2021-01-06 17:00:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:27,150 INFO L225 Difference]: With dead ends: 232 [2021-01-06 17:00:27,150 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 17:00:27,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:00:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 17:00:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2021-01-06 17:00:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2021-01-06 17:00:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2021-01-06 17:00:27,169 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 40 [2021-01-06 17:00:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:27,169 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2021-01-06 17:00:27,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:00:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2021-01-06 17:00:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:00:27,169 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:27,170 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:27,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-01-06 17:00:27,370 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash 170160131, now seen corresponding path program 92 times [2021-01-06 17:00:27,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:27,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813188555] [2021-01-06 17:00:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:00:27,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813188555] [2021-01-06 17:00:27,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567506837] [2021-01-06 17:00:27,963 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 [2021-01-06 17:00:28,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:28,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:28,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 17:00:28,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:00:28,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:28,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-01-06 17:00:28,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777903570] [2021-01-06 17:00:28,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:00:28,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:00:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:00:28,666 INFO L87 Difference]: Start difference. First operand 196 states and 237 transitions. Second operand 36 states. [2021-01-06 17:00:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:29,399 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2021-01-06 17:00:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:00:29,399 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2021-01-06 17:00:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:29,401 INFO L225 Difference]: With dead ends: 229 [2021-01-06 17:00:29,401 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 17:00:29,401 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 [2021-01-06 17:00:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 17:00:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 197. [2021-01-06 17:00:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2021-01-06 17:00:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 238 transitions. [2021-01-06 17:00:29,425 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 238 transitions. Word has length 41 [2021-01-06 17:00:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:29,425 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 238 transitions. [2021-01-06 17:00:29,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:00:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 238 transitions. [2021-01-06 17:00:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:00:29,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:29,426 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:29,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:29,626 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1448130165, now seen corresponding path program 93 times [2021-01-06 17:00:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:29,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072380047] [2021-01-06 17:00:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072380047] [2021-01-06 17:00:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900593187] [2021-01-06 17:00:30,202 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 [2021-01-06 17:00:30,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 17:00:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:31,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:31,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 36 [2021-01-06 17:00:31,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035948202] [2021-01-06 17:00:31,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:00:31,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:31,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:00:31,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:00:31,840 INFO L87 Difference]: Start difference. First operand 197 states and 238 transitions. Second operand 36 states. [2021-01-06 17:00:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:33,451 INFO L93 Difference]: Finished difference Result 232 states and 272 transitions. [2021-01-06 17:00:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:00:33,452 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2021-01-06 17:00:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:33,454 INFO L225 Difference]: With dead ends: 232 [2021-01-06 17:00:33,454 INFO L226 Difference]: Without dead ends: 215 [2021-01-06 17:00:33,454 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 [2021-01-06 17:00:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-01-06 17:00:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 198. [2021-01-06 17:00:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 17:00:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2021-01-06 17:00:33,478 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 41 [2021-01-06 17:00:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:33,479 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2021-01-06 17:00:33,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:00:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2021-01-06 17:00:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:00:33,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:33,480 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:33,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-06 17:00:33,683 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1482378749, now seen corresponding path program 94 times [2021-01-06 17:00:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:33,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173572098] [2021-01-06 17:00:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173572098] [2021-01-06 17:00:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693185146] [2021-01-06 17:00:34,228 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 [2021-01-06 17:00:34,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:34,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:00:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:34,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:34,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 17:00:34,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304984370] [2021-01-06 17:00:34,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:00:34,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:34,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:00:34,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:00:34,394 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand 24 states. [2021-01-06 17:00:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:35,842 INFO L93 Difference]: Finished difference Result 235 states and 275 transitions. [2021-01-06 17:00:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 17:00:35,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2021-01-06 17:00:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:35,844 INFO L225 Difference]: With dead ends: 235 [2021-01-06 17:00:35,844 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 17:00:35,845 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 [2021-01-06 17:00:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 17:00:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 199. [2021-01-06 17:00:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 17:00:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2021-01-06 17:00:35,866 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 41 [2021-01-06 17:00:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:35,866 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2021-01-06 17:00:35,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:00:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2021-01-06 17:00:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:00:35,867 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:35,867 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:36,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-06 17:00:36,070 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:36,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash 372980853, now seen corresponding path program 95 times [2021-01-06 17:00:36,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:36,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631068718] [2021-01-06 17:00:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 17:00:36,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631068718] [2021-01-06 17:00:36,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265040229] [2021-01-06 17:00:36,577 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 [2021-01-06 17:00:43,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:00:43,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:43,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:00:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 17:00:44,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:44,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 27 [2021-01-06 17:00:44,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480818935] [2021-01-06 17:00:44,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:00:44,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:00:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:00:44,157 INFO L87 Difference]: Start difference. First operand 199 states and 240 transitions. Second operand 27 states. [2021-01-06 17:00:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:45,257 INFO L93 Difference]: Finished difference Result 238 states and 278 transitions. [2021-01-06 17:00:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:00:45,257 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 41 [2021-01-06 17:00:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:45,258 INFO L225 Difference]: With dead ends: 238 [2021-01-06 17:00:45,258 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 17:00:45,259 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 [2021-01-06 17:00:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 17:00:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2021-01-06 17:00:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-01-06 17:00:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2021-01-06 17:00:45,279 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 41 [2021-01-06 17:00:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:45,279 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2021-01-06 17:00:45,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:00:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2021-01-06 17:00:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:00:45,280 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:45,280 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:45,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-01-06 17:00:45,481 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:45,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1735291263, now seen corresponding path program 96 times [2021-01-06 17:00:45,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:45,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002404218] [2021-01-06 17:00:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:00:45,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002404218] [2021-01-06 17:00:45,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621417502] [2021-01-06 17:00:45,806 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 [2021-01-06 17:00:46,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 17:00:46,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 17:00:46,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:46,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:00:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:00:46,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:46,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 17:00:46,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435741332] [2021-01-06 17:00:46,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:00:46,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:46,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:00:46,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:00:46,339 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand 16 states. [2021-01-06 17:00:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:47,024 INFO L93 Difference]: Finished difference Result 542 states and 670 transitions. [2021-01-06 17:00:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:00:47,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2021-01-06 17:00:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:47,027 INFO L225 Difference]: With dead ends: 542 [2021-01-06 17:00:47,027 INFO L226 Difference]: Without dead ends: 526 [2021-01-06 17:00:47,027 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 [2021-01-06 17:00:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-01-06 17:00:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 207. [2021-01-06 17:00:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 17:00:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 250 transitions. [2021-01-06 17:00:47,051 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 250 transitions. Word has length 42 [2021-01-06 17:00:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:47,051 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 250 transitions. [2021-01-06 17:00:47,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:00:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 250 transitions. [2021-01-06 17:00:47,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:00:47,051 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:47,051 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:47,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:47,252 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash -463274033, now seen corresponding path program 97 times [2021-01-06 17:00:47,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:47,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007515379] [2021-01-06 17:00:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:47,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007515379] [2021-01-06 17:00:47,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905321899] [2021-01-06 17:00:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 17:00:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 17:00:47,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:00:48,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:48,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 17:00:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053850146] [2021-01-06 17:00:48,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:00:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:00:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:00:48,032 INFO L87 Difference]: Start difference. First operand 207 states and 250 transitions. Second operand 26 states. [2021-01-06 17:00:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:49,379 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2021-01-06 17:00:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 17:00:49,380 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2021-01-06 17:00:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:49,381 INFO L225 Difference]: With dead ends: 242 [2021-01-06 17:00:49,381 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 17:00:49,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=1826, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:00:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 17:00:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 208. [2021-01-06 17:00:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2021-01-06 17:00:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 251 transitions. [2021-01-06 17:00:49,410 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 251 transitions. Word has length 42 [2021-01-06 17:00:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:49,410 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 251 transitions. [2021-01-06 17:00:49,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:00:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 251 transitions. [2021-01-06 17:00:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:00:49,411 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:49,411 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:49,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-01-06 17:00:49,628 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:49,628 INFO L82 PathProgramCache]: Analyzing trace with hash -319340609, now seen corresponding path program 98 times [2021-01-06 17:00:49,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:49,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112683465] [2021-01-06 17:00:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:50,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112683465] [2021-01-06 17:00:50,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952452247] [2021-01-06 17:00:50,229 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 [2021-01-06 17:00:50,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:50,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:50,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:00:50,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:00:50,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:50,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 17:00:50,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661826813] [2021-01-06 17:00:50,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:00:50,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:00:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:00:50,400 INFO L87 Difference]: Start difference. First operand 208 states and 251 transitions. Second operand 25 states. [2021-01-06 17:00:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:52,036 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2021-01-06 17:00:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 17:00:52,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2021-01-06 17:00:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:52,042 INFO L225 Difference]: With dead ends: 245 [2021-01-06 17:00:52,042 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 17:00:52,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=1910, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:00:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 17:00:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 209. [2021-01-06 17:00:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 17:00:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 252 transitions. [2021-01-06 17:00:52,062 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 252 transitions. Word has length 42 [2021-01-06 17:00:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:52,063 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 252 transitions. [2021-01-06 17:00:52,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:00:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 252 transitions. [2021-01-06 17:00:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:00:52,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:52,063 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:52,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-01-06 17:00:52,266 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash 249721231, now seen corresponding path program 99 times [2021-01-06 17:00:52,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:52,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036415008] [2021-01-06 17:00:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 17:00:52,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036415008] [2021-01-06 17:00:52,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219461247] [2021-01-06 17:00:52,815 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 [2021-01-06 17:00:53,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:00:53,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:53,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 17:00:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:00:55,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:55,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 40 [2021-01-06 17:00:55,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673077703] [2021-01-06 17:00:55,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:00:55,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:00:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1462, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:00:55,859 INFO L87 Difference]: Start difference. First operand 209 states and 252 transitions. Second operand 40 states. [2021-01-06 17:00:59,184 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-01-06 17:01:00,063 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-01-06 17:01:01,240 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-01-06 17:01:02,345 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-01-06 17:01:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:07,217 INFO L93 Difference]: Finished difference Result 334 states and 394 transitions. [2021-01-06 17:01:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 17:01:07,219 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2021-01-06 17:01:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:07,219 INFO L225 Difference]: With dead ends: 334 [2021-01-06 17:01:07,219 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 17:01:07,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=478, Invalid=7532, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 17:01:07,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 17:01:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2021-01-06 17:01:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-01-06 17:01:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2021-01-06 17:01:07,250 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 42 [2021-01-06 17:01:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:07,250 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2021-01-06 17:01:07,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:01:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2021-01-06 17:01:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:01:07,251 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:07,251 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:07,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-01-06 17:01:07,452 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1285251197, now seen corresponding path program 100 times [2021-01-06 17:01:07,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:07,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250055192] [2021-01-06 17:01:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:01:08,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250055192] [2021-01-06 17:01:08,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276602311] [2021-01-06 17:01:08,187 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 [2021-01-06 17:01:08,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:08,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 17:01:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 17:01:09,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:09,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2021-01-06 17:01:09,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701942921] [2021-01-06 17:01:09,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:01:09,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:09,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:01:09,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:01:09,078 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand 38 states. [2021-01-06 17:01:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:09,732 INFO L93 Difference]: Finished difference Result 237 states and 277 transitions. [2021-01-06 17:01:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:01:09,733 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2021-01-06 17:01:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:09,734 INFO L225 Difference]: With dead ends: 237 [2021-01-06 17:01:09,734 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 17:01:09,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:01:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 17:01:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-01-06 17:01:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 17:01:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2021-01-06 17:01:09,755 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 43 [2021-01-06 17:01:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:09,755 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2021-01-06 17:01:09,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:01:09,756 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2021-01-06 17:01:09,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:01:09,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:09,756 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:09,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:09,957 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:09,958 INFO L82 PathProgramCache]: Analyzing trace with hash 412737973, now seen corresponding path program 101 times [2021-01-06 17:01:09,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:09,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335830664] [2021-01-06 17:01:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:01:10,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335830664] [2021-01-06 17:01:10,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026280986] [2021-01-06 17:01:10,690 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 [2021-01-06 17:01:13,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 17:01:13,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 17:01:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:01:13,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:13,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 37 [2021-01-06 17:01:13,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168793761] [2021-01-06 17:01:13,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:01:13,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:13,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:01:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:01:13,823 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 37 states. [2021-01-06 17:01:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:14,770 INFO L93 Difference]: Finished difference Result 242 states and 280 transitions. [2021-01-06 17:01:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:01:14,771 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 43 [2021-01-06 17:01:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:14,772 INFO L225 Difference]: With dead ends: 242 [2021-01-06 17:01:14,772 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 17:01:14,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:01:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 17:01:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 208. [2021-01-06 17:01:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2021-01-06 17:01:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 247 transitions. [2021-01-06 17:01:14,794 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 247 transitions. Word has length 43 [2021-01-06 17:01:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:14,795 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 247 transitions. [2021-01-06 17:01:14,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 17:01:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 247 transitions. [2021-01-06 17:01:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:01:14,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:14,795 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:14,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:14,996 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1375103363, now seen corresponding path program 102 times [2021-01-06 17:01:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:14,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418896982] [2021-01-06 17:01:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:01:15,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418896982] [2021-01-06 17:01:15,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610586208] [2021-01-06 17:01:15,687 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 [2021-01-06 17:01:16,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 17:01:16,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 17:01:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:01:16,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:16,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 28 [2021-01-06 17:01:16,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187358657] [2021-01-06 17:01:16,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:01:16,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:16,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:01:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:01:16,972 INFO L87 Difference]: Start difference. First operand 208 states and 247 transitions. Second operand 28 states. [2021-01-06 17:01:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:18,794 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2021-01-06 17:01:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:01:18,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 43 [2021-01-06 17:01:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:18,796 INFO L225 Difference]: With dead ends: 245 [2021-01-06 17:01:18,796 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 17:01:18,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=150, Invalid=1830, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:01:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 17:01:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 209. [2021-01-06 17:01:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 17:01:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 248 transitions. [2021-01-06 17:01:18,818 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 248 transitions. Word has length 43 [2021-01-06 17:01:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:18,818 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 248 transitions. [2021-01-06 17:01:18,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:01:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 248 transitions. [2021-01-06 17:01:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:01:18,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:18,819 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:19,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:19,020 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash 723640245, now seen corresponding path program 103 times [2021-01-06 17:01:19,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:19,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754048965] [2021-01-06 17:01:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 17:01:19,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754048965] [2021-01-06 17:01:19,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167973944] [2021-01-06 17:01:19,659 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 [2021-01-06 17:01:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:19,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:01:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 17:01:19,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:19,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 17:01:19,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169516630] [2021-01-06 17:01:19,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:01:19,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:19,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:01:19,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:01:19,851 INFO L87 Difference]: Start difference. First operand 209 states and 248 transitions. Second operand 25 states. [2021-01-06 17:01:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:21,563 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2021-01-06 17:01:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:01:21,564 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2021-01-06 17:01:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:21,564 INFO L225 Difference]: With dead ends: 248 [2021-01-06 17:01:21,564 INFO L226 Difference]: Without dead ends: 229 [2021-01-06 17:01:21,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1662, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 17:01:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-01-06 17:01:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2021-01-06 17:01:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2021-01-06 17:01:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 249 transitions. [2021-01-06 17:01:21,586 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 249 transitions. Word has length 43 [2021-01-06 17:01:21,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:21,586 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 249 transitions. [2021-01-06 17:01:21,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:01:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 249 transitions. [2021-01-06 17:01:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:01:21,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:21,587 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:21,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-01-06 17:01:21,802 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1832377077, now seen corresponding path program 104 times [2021-01-06 17:01:21,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:21,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582666722] [2021-01-06 17:01:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:01:22,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582666722] [2021-01-06 17:01:22,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942491526] [2021-01-06 17:01:22,996 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 [2021-01-06 17:01:23,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:23,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 17:01:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:01:23,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:23,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 17:01:23,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436051809] [2021-01-06 17:01:23,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:01:23,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:23,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:01:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:01:23,202 INFO L87 Difference]: Start difference. First operand 210 states and 249 transitions. Second operand 35 states. [2021-01-06 17:01:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:27,199 INFO L93 Difference]: Finished difference Result 316 states and 410 transitions. [2021-01-06 17:01:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 17:01:27,200 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2021-01-06 17:01:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:27,201 INFO L225 Difference]: With dead ends: 316 [2021-01-06 17:01:27,201 INFO L226 Difference]: Without dead ends: 304 [2021-01-06 17:01:27,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=214, Invalid=3692, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:01:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-01-06 17:01:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 221. [2021-01-06 17:01:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-01-06 17:01:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2021-01-06 17:01:27,228 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 43 [2021-01-06 17:01:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:27,229 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2021-01-06 17:01:27,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:01:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2021-01-06 17:01:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:01:27,229 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:27,229 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:27,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-01-06 17:01:27,430 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:27,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1799306383, now seen corresponding path program 105 times [2021-01-06 17:01:27,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:27,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218162800] [2021-01-06 17:01:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:01:28,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218162800] [2021-01-06 17:01:28,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923264562] [2021-01-06 17:01:28,245 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 [2021-01-06 17:01:29,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:01:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:29,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 17:01:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 17:01:30,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:30,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-01-06 17:01:30,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172503135] [2021-01-06 17:01:30,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:01:30,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:01:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:01:30,378 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand 39 states. [2021-01-06 17:01:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:31,453 INFO L93 Difference]: Finished difference Result 256 states and 296 transitions. [2021-01-06 17:01:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:01:31,454 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2021-01-06 17:01:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:31,454 INFO L225 Difference]: With dead ends: 256 [2021-01-06 17:01:31,454 INFO L226 Difference]: Without dead ends: 239 [2021-01-06 17:01:31,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:01:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-01-06 17:01:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 222. [2021-01-06 17:01:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2021-01-06 17:01:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2021-01-06 17:01:31,479 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 44 [2021-01-06 17:01:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:31,479 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2021-01-06 17:01:31,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:01:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2021-01-06 17:01:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:01:31,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:31,480 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:31,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-06 17:01:31,681 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1931708353, now seen corresponding path program 106 times [2021-01-06 17:01:31,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:31,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563467302] [2021-01-06 17:01:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:01:32,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563467302] [2021-01-06 17:01:32,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869913503] [2021-01-06 17:01:32,426 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 [2021-01-06 17:01:32,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:32,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:01:32,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 17:01:32,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:32,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 17:01:32,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437672096] [2021-01-06 17:01:32,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:01:32,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:32,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:01:32,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:01:32,614 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand 27 states. [2021-01-06 17:01:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:34,467 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2021-01-06 17:01:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:01:34,468 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2021-01-06 17:01:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:34,469 INFO L225 Difference]: With dead ends: 259 [2021-01-06 17:01:34,469 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 17:01:34,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=1914, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:01:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 17:01:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 223. [2021-01-06 17:01:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2021-01-06 17:01:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2021-01-06 17:01:34,494 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 44 [2021-01-06 17:01:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:34,494 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2021-01-06 17:01:34,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:01:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2021-01-06 17:01:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:01:34,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:34,494 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:34,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-06 17:01:34,695 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1764739505, now seen corresponding path program 107 times [2021-01-06 17:01:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:34,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12955143] [2021-01-06 17:01:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 17:01:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12955143] [2021-01-06 17:01:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361145245] [2021-01-06 17:01:35,398 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 [2021-01-06 17:01:47,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 17:01:47,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 17:01:47,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 17:01:48,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:48,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-01-06 17:01:48,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503272974] [2021-01-06 17:01:48,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:01:48,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:48,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:01:48,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:01:48,996 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand 37 states.