/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/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:32:22,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:32:22,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:32:22,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:32:22,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:32:22,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:32:22,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:32:22,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:32:22,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:32:22,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:32:22,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:32:22,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:32:22,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:32:22,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:32:22,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:32:22,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:32:22,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:32:22,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:32:23,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:32:23,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:32:23,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:32:23,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:32:23,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:32:23,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:32:23,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:32:23,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:32:23,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:32:23,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:32:23,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:32:23,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:32:23,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:32:23,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:32:23,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:32:23,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:32:23,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:32:23,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:32:23,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:32:23,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:32:23,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:32:23,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:32:23,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:32:23,122 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:32:23,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:32:23,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:32:23,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:32:23,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:32:23,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:32:23,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:32:23,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:32:23,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:32:23,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:32:23,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:32:23,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:32:23,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:32:23,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:32:23,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:32:23,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:32:23,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:32:23,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:32:23,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:32:23,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:32:23,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:32:23,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:32:23,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:32:23,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:32:23,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:32:23,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:32:23,597 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:32:23,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_2.i [2020-12-22 04:32:23,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/462aaecf6/db106008f0aa4494b3304d8b9832d2ee/FLAG4aef34e26 [2020-12-22 04:32:24,362 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:32:24,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i [2020-12-22 04:32:24,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/462aaecf6/db106008f0aa4494b3304d8b9832d2ee/FLAG4aef34e26 [2020-12-22 04:32:24,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/462aaecf6/db106008f0aa4494b3304d8b9832d2ee [2020-12-22 04:32:24,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:32:24,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:32:24,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:32:24,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:32:24,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:32:24,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:32:24" (1/1) ... [2020-12-22 04:32:24,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1298d545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:24, skipping insertion in model container [2020-12-22 04:32:24,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:32:24" (1/1) ... [2020-12-22 04:32:24,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:32:24,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:32:24,973 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2020-12-22 04:32:24,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:32:24,994 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:32:25,010 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2020-12-22 04:32:25,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:32:25,031 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:32:25,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25 WrapperNode [2020-12-22 04:32:25,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:32:25,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:32:25,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:32:25,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:32:25,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:32:25,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:32:25,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:32:25,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:32:25,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... [2020-12-22 04:32:25,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:32:25,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:32:25,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:32:25,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:32:25,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:32:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:32:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:32:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:32:25,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:32:25,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:32:25,449 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:32:25,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:32:25 BoogieIcfgContainer [2020-12-22 04:32:25,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:32:25,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:32:25,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:32:25,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:32:25,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:32:24" (1/3) ... [2020-12-22 04:32:25,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d4db09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:32:25, skipping insertion in model container [2020-12-22 04:32:25,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:32:25" (2/3) ... [2020-12-22 04:32:25,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d4db09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:32:25, skipping insertion in model container [2020-12-22 04:32:25,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:32:25" (3/3) ... [2020-12-22 04:32:25,462 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2020-12-22 04:32:25,469 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:32:25,475 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:32:25,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:32:25,573 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:32:25,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:32:25,592 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:32:25,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:32:25,593 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:32:25,593 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:32:25,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:32:25,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:32:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 04:32:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:32:25,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:25,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:32:25,624 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-22 04:32:25,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:25,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169857748] [2020-12-22 04:32:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:25,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169857748] [2020-12-22 04:32:25,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:32:25,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:32:25,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851365737] [2020-12-22 04:32:25,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:32:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:32:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:32:25,933 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-22 04:32:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:26,006 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-22 04:32:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:32:26,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:32:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:26,033 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:32:26,034 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:32:26,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:32:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:32:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-22 04:32:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:32:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:32:26,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-22 04:32:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:26,091 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:32:26,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:32:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:32:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:32:26,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:26,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:26,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:32:26,093 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-22 04:32:26,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:26,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643285487] [2020-12-22 04:32:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643285487] [2020-12-22 04:32:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430861726] [2020-12-22 04:32:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:32:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:26,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:26,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:32:26,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049301806] [2020-12-22 04:32:26,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:32:26,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:26,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:32:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:32:26,291 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-22 04:32:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:26,322 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:32:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:32:26,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:32:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:26,323 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:32:26,323 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:32:26,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:32:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:32:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:32:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:32:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:32:26,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-22 04:32:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:26,328 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:32:26,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:32:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:32:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:32:26,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:26,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:26,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:32:26,545 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:26,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-22 04:32:26,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:26,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982237399] [2020-12-22 04:32:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:26,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982237399] [2020-12-22 04:32:26,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511102157] [2020-12-22 04:32:26,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:26,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:26,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:26,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:32:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:26,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:26,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:32:26,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532163330] [2020-12-22 04:32:26,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:32:26,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:32:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:32:26,745 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-22 04:32:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:26,785 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:32:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:32:26,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:32:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:26,787 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:32:26,788 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:32:26,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:32:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:32:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-22 04:32:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:32:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:32:26,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-22 04:32:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:26,793 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:32:26,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:32:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:32:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:32:26,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:26,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:27,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:27,009 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-22 04:32:27,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:27,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33153432] [2020-12-22 04:32:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33153432] [2020-12-22 04:32:27,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073589955] [2020-12-22 04:32:27,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:27,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:32:27,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:27,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:32:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:27,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:32:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925847724] [2020-12-22 04:32:27,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:32:27,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:32:27,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:32:27,244 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-22 04:32:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:27,291 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:32:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:32:27,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 04:32:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:27,294 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:32:27,294 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:32:27,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:32:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:32:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:32:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:32:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:32:27,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-22 04:32:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:27,300 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:32:27,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:32:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:32:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:32:27,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:27,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:27,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:27,515 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:27,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-12-22 04:32:27,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:27,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505640220] [2020-12-22 04:32:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505640220] [2020-12-22 04:32:27,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828395096] [2020-12-22 04:32:27,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:27,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:27,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:27,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:32:27,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:27,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:27,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:32:27,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186324968] [2020-12-22 04:32:27,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:32:27,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:27,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:32:27,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:32:27,757 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-12-22 04:32:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:27,810 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:32:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:32:27,811 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 04:32:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:27,812 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:32:27,812 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:32:27,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:32:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:32:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:32:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:32:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:32:27,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-22 04:32:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:27,818 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:32:27,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:32:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:32:27,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:32:27,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:27,819 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:28,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:28,034 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-12-22 04:32:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:28,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905643892] [2020-12-22 04:32:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:28,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905643892] [2020-12-22 04:32:28,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124253365] [2020-12-22 04:32:28,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:28,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:32:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:28,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:32:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:28,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:28,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:32:28,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060118200] [2020-12-22 04:32:28,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:32:28,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:28,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:32:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:32:28,277 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-22 04:32:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:28,336 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:32:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:32:28,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:32:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:28,338 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:32:28,338 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:32:28,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:32:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:32:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:32:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:32:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:32:28,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-22 04:32:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:28,344 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:32:28,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:32:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:32:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:32:28,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:28,345 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:28,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:32:28,553 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-12-22 04:32:28,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:28,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400463727] [2020-12-22 04:32:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:28,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400463727] [2020-12-22 04:32:28,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307335352] [2020-12-22 04:32:28,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:28,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:32:28,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:28,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:32:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:28,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:28,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:32:28,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979716587] [2020-12-22 04:32:28,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:32:28,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:32:28,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:32:28,768 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-22 04:32:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:28,806 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:32:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:32:28,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:32:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:28,808 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:32:28,808 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:32:28,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:32:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:32:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:32:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:32:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:32:28,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-22 04:32:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:28,813 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:32:28,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:32:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:32:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:32:28,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:28,814 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:29,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:29,029 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:29,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-12-22 04:32:29,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:29,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629275077] [2020-12-22 04:32:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:29,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629275077] [2020-12-22 04:32:29,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191937312] [2020-12-22 04:32:29,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:29,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:32:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:29,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:29,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:32:29,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045175784] [2020-12-22 04:32:29,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:32:29,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:29,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:32:29,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:32:29,222 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-22 04:32:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:29,265 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:32:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:32:29,266 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-22 04:32:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:29,267 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:32:29,267 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:32:29,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:32:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:32:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:32:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:32:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:32:29,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-22 04:32:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:29,272 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:32:29,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:32:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:32:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:32:29,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:29,274 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:29,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:29,488 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:29,490 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-12-22 04:32:29,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295222780] [2020-12-22 04:32:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:29,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295222780] [2020-12-22 04:32:29,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595397944] [2020-12-22 04:32:29,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:29,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:29,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:29,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:32:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:29,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:29,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:32:29,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701168690] [2020-12-22 04:32:29,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:32:29,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:29,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:32:29,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:32:29,716 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-22 04:32:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:29,759 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:32:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:32:29,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-22 04:32:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:29,760 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:32:29,760 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:32:29,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:32:29,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:32:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-22 04:32:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:32:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:32:29,765 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-22 04:32:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:29,766 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:32:29,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:32:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:32:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:32:29,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:29,767 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:29,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:32:29,983 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:29,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-12-22 04:32:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:29,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113192450] [2020-12-22 04:32:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:30,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113192450] [2020-12-22 04:32:30,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930478652] [2020-12-22 04:32:30,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:30,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:32:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:32:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:30,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:30,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:32:30,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632924503] [2020-12-22 04:32:30,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:32:30,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:32:30,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:32:30,212 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-22 04:32:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:30,259 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:32:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:32:30,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-22 04:32:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:30,261 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:32:30,261 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:32:30,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:32:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:32:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:32:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:32:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:32:30,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-22 04:32:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:30,267 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:32:30,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:32:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:32:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:32:30,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:30,268 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:30,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:30,482 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:30,483 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-12-22 04:32:30,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:30,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156968687] [2020-12-22 04:32:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:30,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156968687] [2020-12-22 04:32:30,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751764475] [2020-12-22 04:32:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:30,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:32:30,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:30,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:30,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:32:30,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522276544] [2020-12-22 04:32:30,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:32:30,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:30,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:32:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:32:30,747 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-12-22 04:32:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:30,818 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:32:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:32:30,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-22 04:32:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:30,820 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:32:30,820 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:32:30,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:32:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:32:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:32:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:32:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:32:30,825 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-22 04:32:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:30,825 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:32:30,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:32:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:32:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:32:30,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:30,826 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:31,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:31,041 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-12-22 04:32:31,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:31,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75694456] [2020-12-22 04:32:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75694456] [2020-12-22 04:32:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589784843] [2020-12-22 04:32:31,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:31,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:32:31,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:31,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:32:31,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:31,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:31,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:32:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398610365] [2020-12-22 04:32:31,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:32:31,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:31,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:32:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:32:31,301 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-22 04:32:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:31,355 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:32:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:32:31,356 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-22 04:32:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:31,357 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:32:31,357 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:32:31,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:32:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:32:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 04:32:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:32:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:32:31,362 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-22 04:32:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:31,362 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:32:31,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:32:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:32:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:32:31,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:31,363 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:31,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:32:31,579 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-12-22 04:32:31,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:31,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975244836] [2020-12-22 04:32:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:31,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975244836] [2020-12-22 04:32:31,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477966278] [2020-12-22 04:32:31,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:31,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:32:31,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:32:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:31,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:31,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:32:31,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237247850] [2020-12-22 04:32:31,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:32:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:32:31,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:32:31,854 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-22 04:32:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:31,919 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:32:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:32:31,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:32:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:31,925 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:32:31,925 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:32:31,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:32:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:32:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 04:32:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:32:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:32:31,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-22 04:32:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:31,936 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:32:31,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:32:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:32:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:32:31,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:31,938 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:32,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:32:32,142 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:32,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-12-22 04:32:32,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:32,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906730880] [2020-12-22 04:32:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:32,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906730880] [2020-12-22 04:32:32,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502447114] [2020-12-22 04:32:32,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:32:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:32,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:32,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:32:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750678386] [2020-12-22 04:32:32,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:32:32,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:32:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:32:32,474 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-22 04:32:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:32,528 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:32:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:32:32,529 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:32:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:32,529 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:32:32,529 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:32:32,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:32:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:32:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:32:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:32:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:32:32,534 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-22 04:32:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:32,535 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:32:32,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:32:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:32:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:32:32,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:32,536 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:32,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:32:32,748 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-12-22 04:32:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:32,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597844736] [2020-12-22 04:32:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:32,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597844736] [2020-12-22 04:32:32,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638431944] [2020-12-22 04:32:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:33,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:33,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:33,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:32:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:33,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:33,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:32:33,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412717752] [2020-12-22 04:32:33,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:32:33,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:32:33,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:32:33,097 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-22 04:32:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:33,161 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:32:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:32:33,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-22 04:32:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:33,162 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:32:33,162 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:32:33,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:32:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:32:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:32:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:32:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:32:33,167 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-22 04:32:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:33,168 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:32:33,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:32:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:32:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:32:33,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:33,168 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:33,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:33,383 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:33,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-12-22 04:32:33,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:33,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657561551] [2020-12-22 04:32:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:33,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657561551] [2020-12-22 04:32:33,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295475188] [2020-12-22 04:32:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:33,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:32:33,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:33,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:32:33,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:33,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:33,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:32:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072662884] [2020-12-22 04:32:33,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:32:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:32:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:32:33,757 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-22 04:32:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:33,814 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:32:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:32:33,814 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-22 04:32:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:33,815 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:32:33,815 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:32:33,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:32:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:32:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 04:32:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:32:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:32:33,833 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-22 04:32:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:33,834 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:32:33,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:32:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:32:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:32:33,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:33,837 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:34,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:32:34,039 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:34,040 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-12-22 04:32:34,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:34,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062401638] [2020-12-22 04:32:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:34,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062401638] [2020-12-22 04:32:34,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943031632] [2020-12-22 04:32:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:34,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:34,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:32:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:34,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:34,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:32:34,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065249810] [2020-12-22 04:32:34,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:32:34,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:34,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:32:34,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:32:34,413 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-12-22 04:32:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:34,505 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:32:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:32:34,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-22 04:32:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:34,507 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:32:34,507 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:32:34,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:32:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:32:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:32:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:32:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:32:34,511 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-22 04:32:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:34,511 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:32:34,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:32:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:32:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:32:34,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:34,512 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:34,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:32:34,727 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:34,728 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-12-22 04:32:34,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:34,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173189369] [2020-12-22 04:32:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:34,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173189369] [2020-12-22 04:32:34,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528792776] [2020-12-22 04:32:34,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:35,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:32:35,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:32:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:35,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:35,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:32:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244375505] [2020-12-22 04:32:35,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:32:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:32:35,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:32:35,100 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-22 04:32:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:35,175 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:32:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:32:35,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:32:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:35,176 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:32:35,176 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:32:35,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:32:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:32:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:32:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:32:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:32:35,180 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-22 04:32:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:35,180 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:32:35,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:32:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:32:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:32:35,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:35,181 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:35,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:32:35,396 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:35,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-12-22 04:32:35,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:35,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585744031] [2020-12-22 04:32:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:35,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585744031] [2020-12-22 04:32:35,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482647770] [2020-12-22 04:32:35,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:35,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:32:35,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:35,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:32:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:35,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:35,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:32:35,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880720048] [2020-12-22 04:32:35,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:32:35,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:32:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:32:35,792 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-22 04:32:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:35,851 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:32:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:32:35,851 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-22 04:32:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:35,853 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:32:35,853 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:32:35,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:32:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:32:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-22 04:32:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:32:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:32:35,873 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-22 04:32:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:35,874 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:32:35,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:32:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:32:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:32:35,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:35,874 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:36,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:36,075 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-12-22 04:32:36,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:36,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820230616] [2020-12-22 04:32:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:36,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820230616] [2020-12-22 04:32:36,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102094014] [2020-12-22 04:32:36,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:32:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:36,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:36,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:32:36,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764952110] [2020-12-22 04:32:36,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:32:36,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:36,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:32:36,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:32:36,493 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-22 04:32:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:36,573 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:32:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:32:36,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-22 04:32:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:36,574 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:32:36,574 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:32:36,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:32:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:32:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:32:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:32:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:32:36,578 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-22 04:32:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:36,578 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:32:36,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:32:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:32:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:32:36,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:36,579 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:36,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:36,790 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:36,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-12-22 04:32:36,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:36,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672044954] [2020-12-22 04:32:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672044954] [2020-12-22 04:32:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223177209] [2020-12-22 04:32:37,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:37,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:37,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:32:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:37,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:37,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:32:37,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566059504] [2020-12-22 04:32:37,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:32:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:32:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:32:37,232 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-22 04:32:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:37,331 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:32:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:32:37,332 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:32:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:37,333 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:32:37,333 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:32:37,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:32:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:32:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:32:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:32:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:32:37,337 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-22 04:32:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:37,337 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:32:37,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:32:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:32:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:32:37,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:37,338 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:37,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:32:37,552 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:37,553 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-12-22 04:32:37,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:37,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179183682] [2020-12-22 04:32:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:37,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179183682] [2020-12-22 04:32:37,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905395057] [2020-12-22 04:32:37,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:37,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:32:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:32:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:38,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:38,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:32:38,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986139003] [2020-12-22 04:32:38,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:32:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:38,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:32:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:32:38,042 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-22 04:32:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:38,143 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:32:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:32:38,143 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:32:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:38,144 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:32:38,144 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:32:38,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:32:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:32:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:32:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:32:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:32:38,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-22 04:32:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:38,148 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:32:38,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:32:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:32:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:32:38,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:38,149 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:38,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:32:38,359 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-12-22 04:32:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:38,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737200766] [2020-12-22 04:32:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:38,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737200766] [2020-12-22 04:32:38,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137418377] [2020-12-22 04:32:38,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:38,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:32:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:38,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:38,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:32:38,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628893086] [2020-12-22 04:32:38,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:32:38,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:38,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:32:38,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:32:38,860 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-12-22 04:32:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:38,959 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:32:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:32:38,959 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-22 04:32:38,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:38,960 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:32:38,960 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:32:38,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:32:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:32:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:32:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:32:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:32:38,963 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-22 04:32:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:38,964 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:32:38,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:32:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:32:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:32:38,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:38,964 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:39,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:39,180 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-12-22 04:32:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:39,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900627566] [2020-12-22 04:32:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:39,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900627566] [2020-12-22 04:32:39,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415098057] [2020-12-22 04:32:39,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:39,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:32:39,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:32:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:39,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:39,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:32:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892512078] [2020-12-22 04:32:39,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:32:39,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:32:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:32:39,676 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-22 04:32:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:39,796 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:32:39,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:32:39,797 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-22 04:32:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:39,798 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:32:39,798 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:32:39,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:32:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:32:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:32:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:32:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:32:39,802 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-22 04:32:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:39,802 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:32:39,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:32:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:32:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:32:39,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:39,803 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:40,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:32:40,011 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:40,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-12-22 04:32:40,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:40,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720945830] [2020-12-22 04:32:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:40,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720945830] [2020-12-22 04:32:40,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582367443] [2020-12-22 04:32:40,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:40,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:32:40,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:40,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:32:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:40,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:40,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:32:40,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826511104] [2020-12-22 04:32:40,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:32:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:40,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:32:40,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:32:40,558 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-22 04:32:40,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:40,655 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:32:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:32:40,656 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-22 04:32:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:40,656 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:32:40,656 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:32:40,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:32:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:32:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 04:32:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:32:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:32:40,659 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-22 04:32:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:40,660 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:32:40,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:32:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:32:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:32:40,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:40,660 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:40,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:40,875 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-12-22 04:32:40,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:40,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961653742] [2020-12-22 04:32:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961653742] [2020-12-22 04:32:41,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302418653] [2020-12-22 04:32:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:41,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:32:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:41,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:41,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:32:41,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990339463] [2020-12-22 04:32:41,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:32:41,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:41,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:32:41,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:32:41,458 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-22 04:32:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:41,563 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:32:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:32:41,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:32:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:41,564 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:32:41,564 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:32:41,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:32:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:32:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:32:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:32:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:32:41,568 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-22 04:32:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:41,568 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:32:41,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:32:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:32:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:32:41,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:41,569 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:41,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:32:41,783 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-12-22 04:32:41,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:41,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898154949] [2020-12-22 04:32:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:42,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898154949] [2020-12-22 04:32:42,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553660478] [2020-12-22 04:32:42,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:42,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:42,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:32:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:42,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:42,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:32:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233464292] [2020-12-22 04:32:42,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:32:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:42,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:32:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:32:42,402 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-22 04:32:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:42,502 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:32:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:32:42,511 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-22 04:32:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:42,513 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:32:42,513 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:32:42,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:32:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:32:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:32:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:32:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:32:42,517 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-22 04:32:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:42,517 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:32:42,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:32:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:32:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:32:42,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:42,518 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:42,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:32:42,719 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:42,720 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-12-22 04:32:42,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:42,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048200934] [2020-12-22 04:32:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:43,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048200934] [2020-12-22 04:32:43,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834308741] [2020-12-22 04:32:43,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:43,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:32:43,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:32:43,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:43,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:43,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:32:43,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205107523] [2020-12-22 04:32:43,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:32:43,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:43,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:32:43,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:32:43,368 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-22 04:32:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:43,475 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:32:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:32:43,476 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-22 04:32:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:43,477 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:32:43,477 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:32:43,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:32:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:32:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 04:32:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:32:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:32:43,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-22 04:32:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:43,481 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:32:43,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:32:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:32:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:32:43,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:43,482 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:43,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:32:43,695 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:43,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-12-22 04:32:43,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:43,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564705402] [2020-12-22 04:32:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:44,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564705402] [2020-12-22 04:32:44,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031103446] [2020-12-22 04:32:44,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:44,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:44,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:44,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:32:44,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:44,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:44,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:32:44,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979561034] [2020-12-22 04:32:44,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:32:44,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:44,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:32:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:32:44,407 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-12-22 04:32:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:44,542 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:32:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:32:44,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:32:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:44,543 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:32:44,543 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:32:44,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:32:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:32:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 04:32:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:32:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:32:44,549 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-22 04:32:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:44,549 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:32:44,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:32:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:32:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:32:44,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:44,551 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:44,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:32:44,766 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:44,767 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-12-22 04:32:44,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:44,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710516227] [2020-12-22 04:32:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:45,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710516227] [2020-12-22 04:32:45,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253238745] [2020-12-22 04:32:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:45,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:32:45,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:32:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:45,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:45,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:32:45,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505555123] [2020-12-22 04:32:45,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:32:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:32:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:32:45,511 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-22 04:32:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:45,631 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:32:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:32:45,631 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:32:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:45,632 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:32:45,632 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:32:45,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:32:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:32:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:32:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:32:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:32:45,636 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-22 04:32:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:45,636 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:32:45,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:32:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:32:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:32:45,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:45,637 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:45,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:45,851 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-12-22 04:32:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:45,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236699194] [2020-12-22 04:32:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:46,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236699194] [2020-12-22 04:32:46,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040935556] [2020-12-22 04:32:46,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:46,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:32:46,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:32:46,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:46,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:46,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:32:46,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876143503] [2020-12-22 04:32:46,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:32:46,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:32:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:32:46,623 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-22 04:32:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:46,745 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:32:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:32:46,745 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-22 04:32:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:46,746 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:32:46,746 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:32:46,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:32:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:32:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 04:32:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:32:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-22 04:32:46,750 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-22 04:32:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:46,750 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-22 04:32:46,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:32:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-22 04:32:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:32:46,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:46,751 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:46,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:46,965 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-12-22 04:32:46,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:46,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30648900] [2020-12-22 04:32:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:47,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30648900] [2020-12-22 04:32:47,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141073978] [2020-12-22 04:32:47,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:47,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:32:47,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:47,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:47,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:32:47,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515596114] [2020-12-22 04:32:47,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:32:47,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:47,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:32:47,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:32:47,820 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-22 04:32:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:47,948 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:32:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:32:47,949 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-22 04:32:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:47,950 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:32:47,950 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:32:47,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:32:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:32:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 04:32:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:32:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-22 04:32:47,954 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-22 04:32:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:47,955 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-22 04:32:47,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:32:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-22 04:32:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:32:47,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:47,956 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:48,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:48,172 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-12-22 04:32:48,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:48,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209701255] [2020-12-22 04:32:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209701255] [2020-12-22 04:32:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641368583] [2020-12-22 04:32:48,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:48,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:48,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:32:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:49,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:49,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:32:49,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468122163] [2020-12-22 04:32:49,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:32:49,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:32:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:32:49,068 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-22 04:32:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:49,206 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:32:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:32:49,207 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-22 04:32:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:49,208 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:32:49,208 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:32:49,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:32:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:32:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:32:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:32:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-22 04:32:49,211 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-22 04:32:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:49,212 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-22 04:32:49,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:32:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-22 04:32:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:32:49,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:49,213 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:49,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:32:49,428 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-12-22 04:32:49,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:49,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585800443] [2020-12-22 04:32:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:50,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585800443] [2020-12-22 04:32:50,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352457528] [2020-12-22 04:32:50,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:50,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:32:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:32:50,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:50,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:50,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:32:50,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352975634] [2020-12-22 04:32:50,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:32:50,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:50,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:32:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:32:50,293 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-22 04:32:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:50,441 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:32:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:32:50,442 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:32:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:50,443 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:32:50,443 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:32:50,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:32:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:32:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-22 04:32:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:32:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 04:32:50,447 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-22 04:32:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:50,447 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 04:32:50,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:32:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 04:32:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:32:50,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:50,448 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:50,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:50,663 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-12-22 04:32:50,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:50,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457209760] [2020-12-22 04:32:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457209760] [2020-12-22 04:32:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116764439] [2020-12-22 04:32:51,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:51,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:32:51,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:32:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:51,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:51,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:32:51,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167470601] [2020-12-22 04:32:51,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:32:51,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:32:51,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:32:51,537 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-12-22 04:32:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:51,656 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:32:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:32:51,658 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-22 04:32:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:51,659 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:32:51,659 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:32:51,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:32:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:32:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 04:32:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:32:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-22 04:32:51,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-22 04:32:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:51,663 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-22 04:32:51,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:32:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-22 04:32:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:32:51,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:51,664 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:51,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:32:51,875 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:51,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-12-22 04:32:51,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:51,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841391899] [2020-12-22 04:32:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:52,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841391899] [2020-12-22 04:32:52,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545473799] [2020-12-22 04:32:52,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:52,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:32:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:52,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:32:52,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:52,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:52,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:32:52,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685371309] [2020-12-22 04:32:52,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:32:52,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:32:52,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:32:52,904 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-22 04:32:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:53,069 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-22 04:32:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:32:53,070 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-22 04:32:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:53,071 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:32:53,071 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:32:53,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:32:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:32:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-22 04:32:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:32:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-22 04:32:53,075 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-22 04:32:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:53,075 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-22 04:32:53,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:32:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-22 04:32:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:32:53,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:53,076 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:53,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:53,290 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:53,290 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-12-22 04:32:53,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:53,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141110169] [2020-12-22 04:32:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:54,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141110169] [2020-12-22 04:32:54,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107016539] [2020-12-22 04:32:54,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:54,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:32:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:32:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:54,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:54,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:32:54,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757650344] [2020-12-22 04:32:54,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:32:54,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:54,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:32:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:32:54,331 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-12-22 04:32:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:54,488 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-22 04:32:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:32:54,489 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:32:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:54,490 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:32:54,490 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:32:54,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:32:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:32:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-22 04:32:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:32:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-22 04:32:54,494 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-22 04:32:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:54,494 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-22 04:32:54,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:32:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-22 04:32:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:32:54,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:54,495 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:54,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:32:54,708 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-12-22 04:32:54,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:54,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658969228] [2020-12-22 04:32:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:55,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658969228] [2020-12-22 04:32:55,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382776693] [2020-12-22 04:32:55,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:55,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:32:55,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:55,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:55,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:32:55,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708794609] [2020-12-22 04:32:55,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:32:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:32:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:32:55,812 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-22 04:32:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:55,986 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-22 04:32:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:32:55,987 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:32:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:55,987 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:32:55,987 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 04:32:55,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:32:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 04:32:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-22 04:32:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:32:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-22 04:32:55,992 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-22 04:32:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:55,992 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-22 04:32:55,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:32:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-22 04:32:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:32:55,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:55,993 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:56,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:32:56,194 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-12-22 04:32:56,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:56,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900707628] [2020-12-22 04:32:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:57,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900707628] [2020-12-22 04:32:57,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398522955] [2020-12-22 04:32:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:57,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:32:57,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:57,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:32:57,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:57,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:57,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:32:57,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15034487] [2020-12-22 04:32:57,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:32:57,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:32:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:32:57,371 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-22 04:32:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:57,540 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-22 04:32:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:32:57,543 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-22 04:32:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:57,544 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:32:57,544 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:32:57,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:32:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:32:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-22 04:32:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:32:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-22 04:32:57,548 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-22 04:32:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:57,548 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-22 04:32:57,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:32:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-22 04:32:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:32:57,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:57,549 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:57,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:32:57,763 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-12-22 04:32:57,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:57,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259883947] [2020-12-22 04:32:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:32:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:58,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259883947] [2020-12-22 04:32:58,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001549704] [2020-12-22 04:32:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:32:58,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:32:58,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:32:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:32:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:32:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:32:58,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:32:58,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:32:58,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490949122] [2020-12-22 04:32:58,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:32:58,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:32:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:32:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:32:58,945 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-22 04:32:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:32:59,086 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-22 04:32:59,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:32:59,086 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-22 04:32:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:32:59,087 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:32:59,087 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:32:59,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:32:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:32:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-22 04:32:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:32:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-22 04:32:59,091 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-22 04:32:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:32:59,092 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-22 04:32:59,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:32:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-22 04:32:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:32:59,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:32:59,093 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-22 04:32:59,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:32:59,307 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:32:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:32:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-12-22 04:32:59,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:32:59,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757638336] [2020-12-22 04:32:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:32:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:00,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757638336] [2020-12-22 04:33:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763239742] [2020-12-22 04:33:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:00,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:33:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:33:00,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:00,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:00,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:33:00,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864453685] [2020-12-22 04:33:00,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:33:00,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:33:00,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:33:00,441 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-12-22 04:33:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:00,609 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-22 04:33:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:33:00,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-12-22 04:33:00,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:00,610 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:33:00,610 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:33:00,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:33:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:33:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-22 04:33:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:33:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-22 04:33:00,614 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-22 04:33:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:00,615 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-22 04:33:00,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:33:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-22 04:33:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:33:00,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:00,616 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:00,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:00,816 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:00,817 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-12-22 04:33:00,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:00,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456503958] [2020-12-22 04:33:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:01,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456503958] [2020-12-22 04:33:01,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638785546] [2020-12-22 04:33:01,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:01,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 04:33:01,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:01,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:33:02,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:02,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:02,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:33:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517664213] [2020-12-22 04:33:02,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:33:02,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:02,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:33:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:33:02,116 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-22 04:33:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:02,306 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-22 04:33:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:33:02,306 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-22 04:33:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:02,308 INFO L225 Difference]: With dead ends: 96 [2020-12-22 04:33:02,308 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 04:33:02,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:33:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 04:33:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-22 04:33:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:33:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-22 04:33:02,312 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-22 04:33:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:02,313 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-22 04:33:02,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:33:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-22 04:33:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 04:33:02,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:02,314 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:02,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 04:33:02,527 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-12-22 04:33:02,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:02,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781786283] [2020-12-22 04:33:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:03,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781786283] [2020-12-22 04:33:03,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066961489] [2020-12-22 04:33:03,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:03,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 04:33:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:33:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:03,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:03,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:33:03,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790225781] [2020-12-22 04:33:03,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:33:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:03,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:33:03,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:33:03,939 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2020-12-22 04:33:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:04,134 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-22 04:33:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:33:04,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-12-22 04:33:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:04,135 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:33:04,135 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:33:04,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:33:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:33:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-22 04:33:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 04:33:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-22 04:33:04,140 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-12-22 04:33:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:04,140 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-22 04:33:04,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:33:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-22 04:33:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:33:04,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:04,141 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:04,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:04,355 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2020-12-22 04:33:04,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:04,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859091840] [2020-12-22 04:33:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:05,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859091840] [2020-12-22 04:33:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367527730] [2020-12-22 04:33:05,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:33:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:05,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:05,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:33:05,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283981381] [2020-12-22 04:33:05,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:33:05,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:05,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:33:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:33:05,721 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-12-22 04:33:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:05,871 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-22 04:33:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:33:05,875 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-22 04:33:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:05,876 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:33:05,877 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:33:05,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:33:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:33:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-22 04:33:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:33:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-22 04:33:05,881 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-12-22 04:33:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:05,881 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-22 04:33:05,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:33:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-22 04:33:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:33:05,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:05,882 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:06,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:06,096 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:06,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2020-12-22 04:33:06,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:06,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831157599] [2020-12-22 04:33:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:07,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831157599] [2020-12-22 04:33:07,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396800752] [2020-12-22 04:33:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:07,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:07,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:33:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:33:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256156344] [2020-12-22 04:33:07,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:33:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:33:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:33:07,506 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-12-22 04:33:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:07,725 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-22 04:33:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:33:07,726 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-22 04:33:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:07,727 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:33:07,727 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:33:07,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:33:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:33:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-22 04:33:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:33:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-22 04:33:07,731 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-12-22 04:33:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:07,731 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-22 04:33:07,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:33:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-22 04:33:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:33:07,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:07,732 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:07,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:33:07,945 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:07,946 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2020-12-22 04:33:07,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:07,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398359873] [2020-12-22 04:33:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:09,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398359873] [2020-12-22 04:33:09,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762440524] [2020-12-22 04:33:09,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:09,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 04:33:09,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:09,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:33:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:09,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:09,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:33:09,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494886207] [2020-12-22 04:33:09,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:33:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:33:09,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:33:09,529 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-12-22 04:33:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:09,698 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-22 04:33:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:33:09,703 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:33:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:09,704 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:33:09,704 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 04:33:09,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:33:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 04:33:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-22 04:33:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:33:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-22 04:33:09,708 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-12-22 04:33:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:09,708 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-22 04:33:09,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:33:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-22 04:33:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:33:09,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:09,709 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:09,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:33:09,922 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2020-12-22 04:33:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:09,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663486461] [2020-12-22 04:33:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663486461] [2020-12-22 04:33:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77885057] [2020-12-22 04:33:11,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:11,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:33:11,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:33:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:11,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:11,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:33:11,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374375569] [2020-12-22 04:33:11,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:33:11,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:11,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:33:11,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:33:11,529 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2020-12-22 04:33:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:11,709 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-22 04:33:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:33:11,709 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-22 04:33:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:11,710 INFO L225 Difference]: With dead ends: 106 [2020-12-22 04:33:11,710 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:33:11,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:33:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:33:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-22 04:33:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 04:33:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-22 04:33:11,713 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-12-22 04:33:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:11,713 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-22 04:33:11,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:33:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-22 04:33:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:33:11,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:11,714 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:11,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:33:11,920 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2020-12-22 04:33:11,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:11,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010319813] [2020-12-22 04:33:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:13,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010319813] [2020-12-22 04:33:13,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799353391] [2020-12-22 04:33:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:13,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 04:33:13,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:13,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:33:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:13,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:13,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 04:33:13,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557212491] [2020-12-22 04:33:13,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:33:13,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:33:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:33:13,562 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2020-12-22 04:33:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:13,755 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-12-22 04:33:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:33:13,756 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-12-22 04:33:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:13,757 INFO L225 Difference]: With dead ends: 108 [2020-12-22 04:33:13,757 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:33:13,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:33:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:33:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-22 04:33:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 04:33:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-12-22 04:33:13,762 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-12-22 04:33:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:13,762 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-12-22 04:33:13,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:33:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-12-22 04:33:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:33:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:13,763 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:13,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:13,964 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2020-12-22 04:33:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:13,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510051470] [2020-12-22 04:33:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:15,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510051470] [2020-12-22 04:33:15,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251316153] [2020-12-22 04:33:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:15,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 04:33:15,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:15,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:33:15,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:15,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:15,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 04:33:15,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932387239] [2020-12-22 04:33:15,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:33:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:33:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:33:15,707 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2020-12-22 04:33:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:15,927 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-22 04:33:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:33:15,928 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2020-12-22 04:33:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:15,931 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:33:15,931 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:33:15,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:33:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:33:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-22 04:33:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 04:33:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-12-22 04:33:15,936 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-12-22 04:33:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:15,936 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-12-22 04:33:15,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:33:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-12-22 04:33:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:33:15,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:15,937 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:16,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:33:16,152 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2020-12-22 04:33:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:16,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731768056] [2020-12-22 04:33:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:17,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731768056] [2020-12-22 04:33:17,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836882125] [2020-12-22 04:33:17,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:33:17,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:17,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:17,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 04:33:17,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488921921] [2020-12-22 04:33:17,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:33:17,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:17,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:33:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:33:17,999 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2020-12-22 04:33:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:18,233 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-12-22 04:33:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:33:18,234 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-12-22 04:33:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:18,235 INFO L225 Difference]: With dead ends: 112 [2020-12-22 04:33:18,235 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 04:33:18,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:33:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 04:33:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-22 04:33:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 04:33:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-22 04:33:18,239 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-12-22 04:33:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:18,239 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-22 04:33:18,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:33:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-22 04:33:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 04:33:18,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:18,240 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:18,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:33:18,449 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:18,450 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2020-12-22 04:33:18,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:18,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991210557] [2020-12-22 04:33:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:20,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991210557] [2020-12-22 04:33:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25542299] [2020-12-22 04:33:20,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:20,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:20,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:33:20,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:20,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:20,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 04:33:20,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891332541] [2020-12-22 04:33:20,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:33:20,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:33:20,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:33:20,307 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2020-12-22 04:33:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:20,544 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-12-22 04:33:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:33:20,545 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-12-22 04:33:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:20,546 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:33:20,546 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:33:20,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:33:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:33:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-22 04:33:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 04:33:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-12-22 04:33:20,550 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-12-22 04:33:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:20,551 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-12-22 04:33:20,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:33:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-12-22 04:33:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 04:33:20,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:20,552 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:20,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:20,767 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:20,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2020-12-22 04:33:20,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:20,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110202841] [2020-12-22 04:33:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:22,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110202841] [2020-12-22 04:33:22,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742852858] [2020-12-22 04:33:22,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:22,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 04:33:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:22,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:33:22,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:22,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:22,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 04:33:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082673184] [2020-12-22 04:33:22,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:33:22,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:33:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:33:22,700 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2020-12-22 04:33:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:22,942 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-12-22 04:33:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:33:22,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2020-12-22 04:33:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:22,944 INFO L225 Difference]: With dead ends: 116 [2020-12-22 04:33:22,944 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:33:22,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:33:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:33:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-22 04:33:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 04:33:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-12-22 04:33:22,948 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-12-22 04:33:22,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:22,948 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-12-22 04:33:22,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:33:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-12-22 04:33:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:33:22,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:22,949 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:23,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 04:33:23,156 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:23,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2020-12-22 04:33:23,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:23,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437159195] [2020-12-22 04:33:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:24,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437159195] [2020-12-22 04:33:24,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473874377] [2020-12-22 04:33:24,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:25,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:33:25,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:25,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:33:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:25,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:25,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 04:33:25,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774992860] [2020-12-22 04:33:25,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:33:25,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:33:25,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:33:25,191 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2020-12-22 04:33:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:25,446 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-22 04:33:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:33:25,446 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-22 04:33:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:25,447 INFO L225 Difference]: With dead ends: 118 [2020-12-22 04:33:25,447 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 04:33:25,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:33:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 04:33:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-22 04:33:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 04:33:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-12-22 04:33:25,451 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-12-22 04:33:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:25,451 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-12-22 04:33:25,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:33:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-12-22 04:33:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:33:25,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:25,452 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:25,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:25,666 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:25,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2020-12-22 04:33:25,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:25,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640502093] [2020-12-22 04:33:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:27,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640502093] [2020-12-22 04:33:27,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486673479] [2020-12-22 04:33:27,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:27,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-22 04:33:27,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:33:27,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:27,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:27,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-22 04:33:27,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658666002] [2020-12-22 04:33:27,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:33:27,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:33:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:33:27,792 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2020-12-22 04:33:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:28,071 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-12-22 04:33:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 04:33:28,071 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-22 04:33:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:28,072 INFO L225 Difference]: With dead ends: 120 [2020-12-22 04:33:28,072 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 04:33:28,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:33:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 04:33:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-22 04:33:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 04:33:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-12-22 04:33:28,077 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-12-22 04:33:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:28,077 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-12-22 04:33:28,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:33:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-12-22 04:33:28,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 04:33:28,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:28,078 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:28,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 04:33:28,292 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2020-12-22 04:33:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:28,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420152539] [2020-12-22 04:33:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:30,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420152539] [2020-12-22 04:33:30,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334228501] [2020-12-22 04:33:30,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:30,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-22 04:33:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:30,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 04:33:30,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:30,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:30,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 04:33:30,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109100870] [2020-12-22 04:33:30,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 04:33:30,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 04:33:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:33:30,508 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2020-12-22 04:33:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:30,754 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-12-22 04:33:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:33:30,754 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-12-22 04:33:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:30,756 INFO L225 Difference]: With dead ends: 122 [2020-12-22 04:33:30,756 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 04:33:30,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:33:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 04:33:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-22 04:33:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 04:33:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-12-22 04:33:30,763 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-12-22 04:33:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:30,763 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-12-22 04:33:30,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 04:33:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-12-22 04:33:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 04:33:30,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:30,764 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:30,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 04:33:30,978 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:30,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2020-12-22 04:33:30,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:30,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279864054] [2020-12-22 04:33:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:33,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279864054] [2020-12-22 04:33:33,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656764124] [2020-12-22 04:33:33,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:33:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:33,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:33,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-22 04:33:33,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799456459] [2020-12-22 04:33:33,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:33:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:33:33,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:33:33,278 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2020-12-22 04:33:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:33,491 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-12-22 04:33:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:33:33,491 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2020-12-22 04:33:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:33,492 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:33:33,492 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 04:33:33,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:33:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 04:33:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-22 04:33:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 04:33:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-12-22 04:33:33,503 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-12-22 04:33:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:33,503 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-12-22 04:33:33,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:33:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-12-22 04:33:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 04:33:33,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:33,504 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:33,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:33,718 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2020-12-22 04:33:33,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:33,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302736981] [2020-12-22 04:33:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302736981] [2020-12-22 04:33:35,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713473086] [2020-12-22 04:33:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:35,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:35,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:33:35,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:35,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:35,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 04:33:35,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359263262] [2020-12-22 04:33:35,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:33:35,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:33:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:33:35,883 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2020-12-22 04:33:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:36,106 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-12-22 04:33:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 04:33:36,106 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2020-12-22 04:33:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:36,107 INFO L225 Difference]: With dead ends: 126 [2020-12-22 04:33:36,107 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 04:33:36,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:33:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 04:33:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-12-22 04:33:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 04:33:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-12-22 04:33:36,123 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-12-22 04:33:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:36,124 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-12-22 04:33:36,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:33:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-12-22 04:33:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 04:33:36,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:36,130 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:36,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 04:33:36,336 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:36,336 INFO L82 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2020-12-22 04:33:36,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:36,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240029448] [2020-12-22 04:33:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:38,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240029448] [2020-12-22 04:33:38,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351530249] [2020-12-22 04:33:38,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:38,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-22 04:33:38,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:33:38,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:38,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:38,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-22 04:33:38,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228625205] [2020-12-22 04:33:38,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 04:33:38,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 04:33:38,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:33:38,775 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2020-12-22 04:33:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:39,005 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-12-22 04:33:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 04:33:39,006 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2020-12-22 04:33:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:39,007 INFO L225 Difference]: With dead ends: 128 [2020-12-22 04:33:39,008 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 04:33:39,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:33:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 04:33:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-22 04:33:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 04:33:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-12-22 04:33:39,028 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-12-22 04:33:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:39,028 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-12-22 04:33:39,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 04:33:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-12-22 04:33:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 04:33:39,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:39,029 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:39,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:39,246 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2020-12-22 04:33:39,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:39,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660320164] [2020-12-22 04:33:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:41,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660320164] [2020-12-22 04:33:41,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128102795] [2020-12-22 04:33:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:41,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:33:41,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:41,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 04:33:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:41,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:41,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 04:33:41,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955767225] [2020-12-22 04:33:41,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 04:33:41,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:41,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 04:33:41,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:33:41,750 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2020-12-22 04:33:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:42,033 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-12-22 04:33:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:33:42,034 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-12-22 04:33:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:42,035 INFO L225 Difference]: With dead ends: 130 [2020-12-22 04:33:42,035 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 04:33:42,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:33:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 04:33:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-12-22 04:33:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 04:33:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-12-22 04:33:42,039 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-12-22 04:33:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:42,039 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-12-22 04:33:42,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 04:33:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-12-22 04:33:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 04:33:42,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:42,040 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:42,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 04:33:42,249 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2020-12-22 04:33:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:42,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870169238] [2020-12-22 04:33:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:44,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870169238] [2020-12-22 04:33:44,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659838859] [2020-12-22 04:33:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:44,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-22 04:33:44,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:33:44,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:44,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:44,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-22 04:33:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133625880] [2020-12-22 04:33:44,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:33:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:33:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:33:44,914 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2020-12-22 04:33:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:45,243 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-12-22 04:33:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:33:45,244 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2020-12-22 04:33:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:45,245 INFO L225 Difference]: With dead ends: 132 [2020-12-22 04:33:45,245 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 04:33:45,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:33:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 04:33:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-22 04:33:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 04:33:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-12-22 04:33:45,250 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-12-22 04:33:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:45,250 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-12-22 04:33:45,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:33:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-12-22 04:33:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 04:33:45,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:45,251 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:45,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 04:33:45,465 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:45,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1789552347, now seen corresponding path program 60 times [2020-12-22 04:33:45,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:45,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251015075] [2020-12-22 04:33:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:47,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251015075] [2020-12-22 04:33:47,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035355893] [2020-12-22 04:33:47,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:48,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-22 04:33:48,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:33:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:48,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:48,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 04:33:48,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475693572] [2020-12-22 04:33:48,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 04:33:48,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 04:33:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:33:48,245 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2020-12-22 04:33:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:48,573 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-12-22 04:33:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 04:33:48,573 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2020-12-22 04:33:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:48,574 INFO L225 Difference]: With dead ends: 134 [2020-12-22 04:33:48,574 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 04:33:48,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:33:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 04:33:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-22 04:33:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 04:33:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-12-22 04:33:48,582 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-12-22 04:33:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:48,582 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-12-22 04:33:48,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 04:33:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-12-22 04:33:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 04:33:48,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:48,583 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:48,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:48,783 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:48,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1719654745, now seen corresponding path program 61 times [2020-12-22 04:33:48,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:48,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743817645] [2020-12-22 04:33:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:51,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743817645] [2020-12-22 04:33:51,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419070720] [2020-12-22 04:33:51,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 04:33:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:51,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:51,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-22 04:33:51,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157538241] [2020-12-22 04:33:51,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 04:33:51,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 04:33:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:33:51,619 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2020-12-22 04:33:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:51,931 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-12-22 04:33:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 04:33:51,932 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2020-12-22 04:33:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:51,933 INFO L225 Difference]: With dead ends: 136 [2020-12-22 04:33:51,933 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 04:33:51,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:33:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 04:33:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-22 04:33:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 04:33:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-12-22 04:33:51,939 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-12-22 04:33:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:51,940 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-12-22 04:33:51,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 04:33:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-12-22 04:33:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 04:33:51,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:51,941 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:52,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:52,156 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:52,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1027431337, now seen corresponding path program 62 times [2020-12-22 04:33:52,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:52,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183878922] [2020-12-22 04:33:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:54,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183878922] [2020-12-22 04:33:54,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199664549] [2020-12-22 04:33:54,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:54,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 04:33:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:55,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:55,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 04:33:55,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383719790] [2020-12-22 04:33:55,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 04:33:55,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:55,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 04:33:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:33:55,110 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2020-12-22 04:33:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:55,428 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-12-22 04:33:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 04:33:55,428 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2020-12-22 04:33:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:55,431 INFO L225 Difference]: With dead ends: 138 [2020-12-22 04:33:55,431 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 04:33:55,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:33:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 04:33:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-12-22 04:33:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 04:33:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-12-22 04:33:55,435 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-12-22 04:33:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:55,435 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-12-22 04:33:55,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 04:33:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-12-22 04:33:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 04:33:55,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:55,436 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:55,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:55,646 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:55,646 INFO L82 PathProgramCache]: Analyzing trace with hash -427730901, now seen corresponding path program 63 times [2020-12-22 04:33:55,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:55,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884069954] [2020-12-22 04:33:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:58,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884069954] [2020-12-22 04:33:58,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2639847] [2020-12-22 04:33:58,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:58,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-22 04:33:58,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:58,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:33:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:58,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:33:58,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-22 04:33:58,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403761886] [2020-12-22 04:33:58,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 04:33:58,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 04:33:58,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:33:58,755 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2020-12-22 04:33:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:59,091 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-12-22 04:33:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 04:33:59,092 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2020-12-22 04:33:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:59,093 INFO L225 Difference]: With dead ends: 140 [2020-12-22 04:33:59,093 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 04:33:59,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:33:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 04:33:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-12-22 04:33:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 04:33:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-12-22 04:33:59,096 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-12-22 04:33:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:59,096 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-12-22 04:33:59,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 04:33:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-12-22 04:33:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 04:33:59,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:59,098 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:59,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:59,298 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:59,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1320696877, now seen corresponding path program 64 times [2020-12-22 04:33:59,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:59,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552739939] [2020-12-22 04:33:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:02,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552739939] [2020-12-22 04:34:02,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773367294] [2020-12-22 04:34:02,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:02,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:34:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:02,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:02,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 04:34:02,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337268448] [2020-12-22 04:34:02,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:34:02,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:02,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:34:02,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:34:02,376 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2020-12-22 04:34:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:02,673 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-12-22 04:34:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 04:34:02,674 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2020-12-22 04:34:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:02,675 INFO L225 Difference]: With dead ends: 142 [2020-12-22 04:34:02,675 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 04:34:02,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:34:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 04:34:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-22 04:34:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 04:34:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-12-22 04:34:02,679 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-12-22 04:34:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:02,679 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-12-22 04:34:02,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 04:34:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-12-22 04:34:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 04:34:02,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:02,680 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:02,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:02,882 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2067388497, now seen corresponding path program 65 times [2020-12-22 04:34:02,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:02,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929210895] [2020-12-22 04:34:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929210895] [2020-12-22 04:34:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083527569] [2020-12-22 04:34:05,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:05,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-22 04:34:05,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:05,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:34:05,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:06,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:06,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-22 04:34:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463411671] [2020-12-22 04:34:06,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 04:34:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 04:34:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:34:06,107 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2020-12-22 04:34:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:06,402 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-12-22 04:34:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 04:34:06,403 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2020-12-22 04:34:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:06,403 INFO L225 Difference]: With dead ends: 144 [2020-12-22 04:34:06,403 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 04:34:06,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:34:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 04:34:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-22 04:34:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 04:34:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-12-22 04:34:06,407 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-12-22 04:34:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:06,407 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-12-22 04:34:06,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 04:34:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-12-22 04:34:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 04:34:06,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:06,409 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:06,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 04:34:06,623 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1862744753, now seen corresponding path program 66 times [2020-12-22 04:34:06,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:06,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107198728] [2020-12-22 04:34:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107198728] [2020-12-22 04:34:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935982277] [2020-12-22 04:34:09,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:09,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-22 04:34:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 04:34:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:09,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:09,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 04:34:09,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729869256] [2020-12-22 04:34:09,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 04:34:09,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 04:34:09,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:34:09,937 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2020-12-22 04:34:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:10,206 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-12-22 04:34:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 04:34:10,207 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2020-12-22 04:34:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:10,208 INFO L225 Difference]: With dead ends: 146 [2020-12-22 04:34:10,208 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 04:34:10,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:34:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 04:34:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-22 04:34:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 04:34:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-12-22 04:34:10,212 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-12-22 04:34:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:10,213 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-12-22 04:34:10,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 04:34:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-12-22 04:34:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 04:34:10,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:10,214 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:10,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 04:34:10,428 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash -850422477, now seen corresponding path program 67 times [2020-12-22 04:34:10,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:10,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161004833] [2020-12-22 04:34:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:13,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161004833] [2020-12-22 04:34:13,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231299388] [2020-12-22 04:34:13,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:13,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:34:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:13,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:13,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-22 04:34:13,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017611409] [2020-12-22 04:34:13,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 04:34:13,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:13,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 04:34:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:34:13,761 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2020-12-22 04:34:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:14,037 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-12-22 04:34:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:34:14,037 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2020-12-22 04:34:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:14,038 INFO L225 Difference]: With dead ends: 148 [2020-12-22 04:34:14,038 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 04:34:14,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:34:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 04:34:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-22 04:34:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 04:34:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-12-22 04:34:14,043 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-12-22 04:34:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:14,044 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-12-22 04:34:14,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 04:34:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-12-22 04:34:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 04:34:14,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:14,045 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:14,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:14,260 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1158981835, now seen corresponding path program 68 times [2020-12-22 04:34:14,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:14,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619685602] [2020-12-22 04:34:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:17,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619685602] [2020-12-22 04:34:17,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236299746] [2020-12-22 04:34:17,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:17,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:34:17,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:17,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:34:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:17,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:17,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 04:34:17,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128800841] [2020-12-22 04:34:17,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 04:34:17,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:17,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 04:34:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:34:17,649 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2020-12-22 04:34:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:17,980 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-12-22 04:34:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 04:34:17,981 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-12-22 04:34:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:17,981 INFO L225 Difference]: With dead ends: 150 [2020-12-22 04:34:17,981 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 04:34:17,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:34:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 04:34:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-22 04:34:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-22 04:34:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-12-22 04:34:17,987 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-12-22 04:34:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:17,987 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-12-22 04:34:17,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 04:34:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-12-22 04:34:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 04:34:17,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:17,988 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:18,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 04:34:18,202 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1331781449, now seen corresponding path program 69 times [2020-12-22 04:34:18,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:18,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544267822] [2020-12-22 04:34:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:21,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544267822] [2020-12-22 04:34:21,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823345963] [2020-12-22 04:34:21,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:21,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-22 04:34:21,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:34:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:21,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:21,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-22 04:34:21,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600178398] [2020-12-22 04:34:21,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 04:34:21,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 04:34:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:34:21,811 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2020-12-22 04:34:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:22,159 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-12-22 04:34:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 04:34:22,160 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2020-12-22 04:34:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:22,161 INFO L225 Difference]: With dead ends: 152 [2020-12-22 04:34:22,161 INFO L226 Difference]: Without dead ends: 148 [2020-12-22 04:34:22,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:34:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-22 04:34:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-22 04:34:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 04:34:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-12-22 04:34:22,166 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-12-22 04:34:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:22,166 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-12-22 04:34:22,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 04:34:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-12-22 04:34:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 04:34:22,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:22,167 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:22,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 04:34:22,382 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash 111514041, now seen corresponding path program 70 times [2020-12-22 04:34:22,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:22,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134354203] [2020-12-22 04:34:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:25,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134354203] [2020-12-22 04:34:25,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11742504] [2020-12-22 04:34:25,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:25,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:25,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 04:34:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:26,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:26,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 04:34:26,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28131015] [2020-12-22 04:34:26,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 04:34:26,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 04:34:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:34:26,116 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2020-12-22 04:34:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:26,426 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-12-22 04:34:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 04:34:26,427 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2020-12-22 04:34:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:26,428 INFO L225 Difference]: With dead ends: 154 [2020-12-22 04:34:26,428 INFO L226 Difference]: Without dead ends: 150 [2020-12-22 04:34:26,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:34:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-22 04:34:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-12-22 04:34:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-22 04:34:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-12-22 04:34:26,433 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-12-22 04:34:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:26,434 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-12-22 04:34:26,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 04:34:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-12-22 04:34:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 04:34:26,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:26,435 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:26,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-22 04:34:26,649 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash -155956677, now seen corresponding path program 71 times [2020-12-22 04:34:26,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:26,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387420486] [2020-12-22 04:34:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:30,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387420486] [2020-12-22 04:34:30,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848596380] [2020-12-22 04:34:30,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:30,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-22 04:34:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 04:34:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:30,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:30,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-22 04:34:30,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289179878] [2020-12-22 04:34:30,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 04:34:30,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:30,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 04:34:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:34:30,391 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2020-12-22 04:34:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:30,815 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-12-22 04:34:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 04:34:30,815 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2020-12-22 04:34:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:30,816 INFO L225 Difference]: With dead ends: 156 [2020-12-22 04:34:30,816 INFO L226 Difference]: Without dead ends: 152 [2020-12-22 04:34:30,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:34:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-22 04:34:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-22 04:34:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 04:34:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-12-22 04:34:30,821 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-12-22 04:34:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:30,821 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-12-22 04:34:30,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 04:34:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-12-22 04:34:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 04:34:30,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:30,822 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:31,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:31,037 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:31,038 INFO L82 PathProgramCache]: Analyzing trace with hash 502721085, now seen corresponding path program 72 times [2020-12-22 04:34:31,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:31,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568582626] [2020-12-22 04:34:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568582626] [2020-12-22 04:34:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293467695] [2020-12-22 04:34:34,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:34,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-22 04:34:34,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:34,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:34:34,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:34,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:34,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-22 04:34:34,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639685861] [2020-12-22 04:34:34,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 04:34:34,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 04:34:34,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:34:34,895 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2020-12-22 04:34:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:35,194 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-12-22 04:34:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 04:34:35,195 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2020-12-22 04:34:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:35,199 INFO L225 Difference]: With dead ends: 158 [2020-12-22 04:34:35,199 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 04:34:35,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:34:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 04:34:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-22 04:34:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 04:34:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-12-22 04:34:35,204 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-12-22 04:34:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:35,204 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-12-22 04:34:35,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 04:34:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-12-22 04:34:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 04:34:35,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:35,205 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:35,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:35,419 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2131857855, now seen corresponding path program 73 times [2020-12-22 04:34:35,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:35,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27003378] [2020-12-22 04:34:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:39,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27003378] [2020-12-22 04:34:39,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308196077] [2020-12-22 04:34:39,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:34:39,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:39,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:39,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-22 04:34:39,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606926608] [2020-12-22 04:34:39,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 04:34:39,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 04:34:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:34:39,367 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2020-12-22 04:34:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:39,810 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-12-22 04:34:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 04:34:39,811 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2020-12-22 04:34:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:39,812 INFO L225 Difference]: With dead ends: 160 [2020-12-22 04:34:39,812 INFO L226 Difference]: Without dead ends: 156 [2020-12-22 04:34:39,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:34:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-22 04:34:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-22 04:34:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 04:34:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-12-22 04:34:39,817 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-12-22 04:34:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:39,817 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-12-22 04:34:39,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 04:34:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-12-22 04:34:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 04:34:39,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:39,818 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:40,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:40,033 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash 69230785, now seen corresponding path program 74 times [2020-12-22 04:34:40,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:40,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129631176] [2020-12-22 04:34:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:43,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129631176] [2020-12-22 04:34:43,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409891068] [2020-12-22 04:34:43,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:43,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:34:43,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:34:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:44,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:44,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-22 04:34:44,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178867242] [2020-12-22 04:34:44,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 04:34:44,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 04:34:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:34:44,086 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2020-12-22 04:34:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:44,507 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-12-22 04:34:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 04:34:44,507 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2020-12-22 04:34:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:44,508 INFO L225 Difference]: With dead ends: 162 [2020-12-22 04:34:44,508 INFO L226 Difference]: Without dead ends: 158 [2020-12-22 04:34:44,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:34:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-22 04:34:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-12-22 04:34:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 04:34:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-12-22 04:34:44,511 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-12-22 04:34:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:44,511 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-12-22 04:34:44,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 04:34:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-12-22 04:34:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 04:34:44,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:44,512 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:44,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-22 04:34:44,713 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2135460029, now seen corresponding path program 75 times [2020-12-22 04:34:44,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:44,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078675292] [2020-12-22 04:34:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:48,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078675292] [2020-12-22 04:34:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227891142] [2020-12-22 04:34:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:48,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-22 04:34:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:34:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:48,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:48,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-22 04:34:48,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797682140] [2020-12-22 04:34:48,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 04:34:48,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 04:34:48,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:34:48,979 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2020-12-22 04:34:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:49,378 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-12-22 04:34:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 04:34:49,379 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2020-12-22 04:34:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:49,381 INFO L225 Difference]: With dead ends: 164 [2020-12-22 04:34:49,381 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 04:34:49,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:34:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 04:34:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-12-22 04:34:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 04:34:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-12-22 04:34:49,385 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-12-22 04:34:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:49,386 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-12-22 04:34:49,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 04:34:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-12-22 04:34:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 04:34:49,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:49,387 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:49,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:49,595 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:49,596 INFO L82 PathProgramCache]: Analyzing trace with hash 870511941, now seen corresponding path program 76 times [2020-12-22 04:34:49,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:49,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766864094] [2020-12-22 04:34:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:53,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766864094] [2020-12-22 04:34:53,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142293720] [2020-12-22 04:34:53,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:53,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:53,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 04:34:53,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:53,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:53,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-22 04:34:53,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249083082] [2020-12-22 04:34:53,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 04:34:53,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:53,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 04:34:53,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:34:53,951 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2020-12-22 04:34:54,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:54,345 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-12-22 04:34:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 04:34:54,346 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2020-12-22 04:34:54,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:54,346 INFO L225 Difference]: With dead ends: 166 [2020-12-22 04:34:54,347 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 04:34:54,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:34:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 04:34:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-12-22 04:34:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 04:34:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-12-22 04:34:54,350 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-12-22 04:34:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:54,351 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-12-22 04:34:54,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 04:34:54,351 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-12-22 04:34:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 04:34:54,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:54,352 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:54,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:54,563 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:54,563 INFO L82 PathProgramCache]: Analyzing trace with hash -903415097, now seen corresponding path program 77 times [2020-12-22 04:34:54,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:54,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024979702] [2020-12-22 04:34:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:58,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024979702] [2020-12-22 04:34:58,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699242769] [2020-12-22 04:34:58,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:58,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-22 04:34:58,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:34:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:59,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:34:59,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-22 04:34:59,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167474458] [2020-12-22 04:34:59,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 04:34:59,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:59,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 04:34:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:34:59,023 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2020-12-22 04:34:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:59,468 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-12-22 04:34:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 04:34:59,469 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2020-12-22 04:34:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:59,470 INFO L225 Difference]: With dead ends: 168 [2020-12-22 04:34:59,470 INFO L226 Difference]: Without dead ends: 164 [2020-12-22 04:34:59,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:34:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-22 04:34:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-12-22 04:34:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 04:34:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-12-22 04:34:59,474 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-12-22 04:34:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:59,474 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-12-22 04:34:59,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 04:34:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-12-22 04:34:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 04:34:59,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:59,475 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:59,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 04:34:59,687 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:59,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:59,687 INFO L82 PathProgramCache]: Analyzing trace with hash -545282103, now seen corresponding path program 78 times [2020-12-22 04:34:59,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:59,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522335199] [2020-12-22 04:34:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:03,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522335199] [2020-12-22 04:35:03,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825523157] [2020-12-22 04:35:03,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:04,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-22 04:35:04,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 04:35:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:04,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:04,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-22 04:35:04,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808748726] [2020-12-22 04:35:04,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 04:35:04,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:04,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 04:35:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 04:35:04,347 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2020-12-22 04:35:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:04,828 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-12-22 04:35:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 04:35:04,829 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2020-12-22 04:35:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:04,829 INFO L225 Difference]: With dead ends: 170 [2020-12-22 04:35:04,829 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 04:35:04,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 04:35:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 04:35:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-12-22 04:35:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 04:35:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-12-22 04:35:04,832 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-12-22 04:35:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:04,832 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-12-22 04:35:04,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 04:35:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-12-22 04:35:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 04:35:04,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:04,833 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:05,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 04:35:05,035 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash 23141451, now seen corresponding path program 79 times [2020-12-22 04:35:05,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:05,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910696297] [2020-12-22 04:35:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910696297] [2020-12-22 04:35:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931162168] [2020-12-22 04:35:09,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 04:35:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:09,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:09,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-22 04:35:09,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618827075] [2020-12-22 04:35:09,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-22 04:35:09,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-22 04:35:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:35:09,824 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2020-12-22 04:35:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:10,193 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2020-12-22 04:35:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 04:35:10,194 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2020-12-22 04:35:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:10,196 INFO L225 Difference]: With dead ends: 172 [2020-12-22 04:35:10,196 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 04:35:10,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:35:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 04:35:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-22 04:35:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 04:35:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-12-22 04:35:10,201 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-12-22 04:35:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:10,201 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-12-22 04:35:10,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-22 04:35:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-12-22 04:35:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 04:35:10,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:10,202 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:10,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:10,417 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash 817330253, now seen corresponding path program 80 times [2020-12-22 04:35:10,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:10,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173940722] [2020-12-22 04:35:10,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:14,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173940722] [2020-12-22 04:35:14,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584959007] [2020-12-22 04:35:14,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:15,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:15,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:35:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:15,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:15,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-22 04:35:15,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951609546] [2020-12-22 04:35:15,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-22 04:35:15,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:15,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-22 04:35:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:35:15,266 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2020-12-22 04:35:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:15,701 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-12-22 04:35:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 04:35:15,701 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2020-12-22 04:35:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:15,702 INFO L225 Difference]: With dead ends: 174 [2020-12-22 04:35:15,702 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 04:35:15,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:35:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 04:35:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-12-22 04:35:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 04:35:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-12-22 04:35:15,705 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-12-22 04:35:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:15,705 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-12-22 04:35:15,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-22 04:35:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-12-22 04:35:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 04:35:15,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:15,707 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:15,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:15,908 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:15,909 INFO L82 PathProgramCache]: Analyzing trace with hash -471409713, now seen corresponding path program 81 times [2020-12-22 04:35:15,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:15,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795984538] [2020-12-22 04:35:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:20,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795984538] [2020-12-22 04:35:20,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57317543] [2020-12-22 04:35:20,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:20,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-22 04:35:20,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:35:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:21,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:21,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-22 04:35:21,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113447470] [2020-12-22 04:35:21,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-22 04:35:21,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:21,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-22 04:35:21,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:35:21,078 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2020-12-22 04:35:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:21,557 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-12-22 04:35:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 04:35:21,558 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2020-12-22 04:35:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:21,558 INFO L225 Difference]: With dead ends: 176 [2020-12-22 04:35:21,559 INFO L226 Difference]: Without dead ends: 172 [2020-12-22 04:35:21,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:35:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-22 04:35:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-12-22 04:35:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 04:35:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-12-22 04:35:21,563 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-12-22 04:35:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:21,564 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-12-22 04:35:21,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-22 04:35:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-12-22 04:35:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 04:35:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:21,565 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:21,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:21,781 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1999935791, now seen corresponding path program 82 times [2020-12-22 04:35:21,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:21,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729186986] [2020-12-22 04:35:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:26,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729186986] [2020-12-22 04:35:26,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663256849] [2020-12-22 04:35:26,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:26,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:26,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 04:35:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:26,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:26,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-22 04:35:26,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523577723] [2020-12-22 04:35:26,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-22 04:35:26,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:26,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-22 04:35:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 04:35:26,950 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2020-12-22 04:35:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:27,428 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-12-22 04:35:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 04:35:27,429 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2020-12-22 04:35:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:27,430 INFO L225 Difference]: With dead ends: 178 [2020-12-22 04:35:27,430 INFO L226 Difference]: Without dead ends: 174 [2020-12-22 04:35:27,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 04:35:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-22 04:35:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-12-22 04:35:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 04:35:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-12-22 04:35:27,435 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-12-22 04:35:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:27,435 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-12-22 04:35:27,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-22 04:35:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-12-22 04:35:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 04:35:27,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:27,436 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:27,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:27,652 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2034681517, now seen corresponding path program 83 times [2020-12-22 04:35:27,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:27,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867831113] [2020-12-22 04:35:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:32,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867831113] [2020-12-22 04:35:32,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957138919] [2020-12-22 04:35:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:32,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-22 04:35:32,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 04:35:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:33,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:33,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-22 04:35:33,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733253518] [2020-12-22 04:35:33,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-22 04:35:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-22 04:35:33,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 04:35:33,039 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2020-12-22 04:35:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:33,458 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-12-22 04:35:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 04:35:33,459 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2020-12-22 04:35:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:33,460 INFO L225 Difference]: With dead ends: 180 [2020-12-22 04:35:33,460 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 04:35:33,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 04:35:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 04:35:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-22 04:35:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 04:35:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-12-22 04:35:33,464 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-12-22 04:35:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:33,464 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-12-22 04:35:33,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-22 04:35:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-12-22 04:35:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 04:35:33,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:33,465 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:33,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:33,679 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:33,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:33,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1065585835, now seen corresponding path program 84 times [2020-12-22 04:35:33,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:33,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660120253] [2020-12-22 04:35:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:38,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660120253] [2020-12-22 04:35:38,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937668223] [2020-12-22 04:35:38,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:38,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-22 04:35:38,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 04:35:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:39,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:39,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-22 04:35:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066252627] [2020-12-22 04:35:39,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-22 04:35:39,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:39,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-22 04:35:39,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:35:39,255 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2020-12-22 04:35:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:39,928 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-12-22 04:35:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 04:35:39,929 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2020-12-22 04:35:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:39,929 INFO L225 Difference]: With dead ends: 182 [2020-12-22 04:35:39,929 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 04:35:39,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:35:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 04:35:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-22 04:35:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 04:35:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-12-22 04:35:39,933 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-12-22 04:35:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:39,934 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-12-22 04:35:39,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-22 04:35:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-12-22 04:35:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 04:35:39,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:39,935 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:40,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-22 04:35:40,145 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:40,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1772538665, now seen corresponding path program 85 times [2020-12-22 04:35:40,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:40,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810679804] [2020-12-22 04:35:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810679804] [2020-12-22 04:35:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914230341] [2020-12-22 04:35:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 04:35:45,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:45,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-22 04:35:45,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194094780] [2020-12-22 04:35:45,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-22 04:35:45,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:45,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-22 04:35:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 04:35:45,741 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2020-12-22 04:35:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:46,328 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-12-22 04:35:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 04:35:46,330 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2020-12-22 04:35:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:46,330 INFO L225 Difference]: With dead ends: 184 [2020-12-22 04:35:46,331 INFO L226 Difference]: Without dead ends: 180 [2020-12-22 04:35:46,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 04:35:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-22 04:35:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-22 04:35:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 04:35:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-12-22 04:35:46,335 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-12-22 04:35:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:46,336 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-12-22 04:35:46,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-22 04:35:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-12-22 04:35:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 04:35:46,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:46,337 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:46,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,551 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1745591769, now seen corresponding path program 86 times [2020-12-22 04:35:46,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:46,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228949467] [2020-12-22 04:35:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228949467] [2020-12-22 04:35:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374056644] [2020-12-22 04:35:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:52,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:52,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:35:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:52,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:52,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-22 04:35:52,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842142528] [2020-12-22 04:35:52,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-22 04:35:52,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:52,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-22 04:35:52,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:35:52,356 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2020-12-22 04:35:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:52,967 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-12-22 04:35:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 04:35:52,968 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2020-12-22 04:35:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:52,968 INFO L225 Difference]: With dead ends: 186 [2020-12-22 04:35:52,968 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 04:35:52,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:35:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 04:35:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-22 04:35:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 04:35:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-12-22 04:35:52,973 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-12-22 04:35:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:52,973 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-12-22 04:35:52,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-22 04:35:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-12-22 04:35:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 04:35:52,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:52,975 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:53,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-12-22 04:35:53,189 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:53,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1765290405, now seen corresponding path program 87 times [2020-12-22 04:35:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:53,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474959322] [2020-12-22 04:35:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:58,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474959322] [2020-12-22 04:35:58,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571815682] [2020-12-22 04:35:58,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:59,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2020-12-22 04:35:59,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:35:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:59,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:59,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2020-12-22 04:35:59,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319607278] [2020-12-22 04:35:59,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-22 04:35:59,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-22 04:35:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 04:35:59,369 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2020-12-22 04:35:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:59,928 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-12-22 04:35:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-22 04:35:59,928 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2020-12-22 04:35:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:59,929 INFO L225 Difference]: With dead ends: 188 [2020-12-22 04:35:59,929 INFO L226 Difference]: Without dead ends: 184 [2020-12-22 04:35:59,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 04:35:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-22 04:35:59,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-12-22 04:35:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 04:35:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-12-22 04:35:59,932 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-12-22 04:35:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:59,932 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-12-22 04:35:59,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-22 04:35:59,932 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-12-22 04:35:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-22 04:35:59,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:59,933 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:00,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-22 04:36:00,134 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash 121235037, now seen corresponding path program 88 times [2020-12-22 04:36:00,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:00,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496803118] [2020-12-22 04:36:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:06,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496803118] [2020-12-22 04:36:06,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328362152] [2020-12-22 04:36:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:06,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:06,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 04:36:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:06,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:06,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2020-12-22 04:36:06,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162581119] [2020-12-22 04:36:06,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-22 04:36:06,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-22 04:36:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:36:06,435 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2020-12-22 04:36:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:06,898 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-12-22 04:36:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-22 04:36:06,899 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2020-12-22 04:36:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:06,900 INFO L225 Difference]: With dead ends: 190 [2020-12-22 04:36:06,900 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 04:36:06,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:36:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 04:36:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-12-22 04:36:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 04:36:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-12-22 04:36:06,904 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-12-22 04:36:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:06,904 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-12-22 04:36:06,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-22 04:36:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-12-22 04:36:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 04:36:06,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:06,906 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:07,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:07,120 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:07,120 INFO L82 PathProgramCache]: Analyzing trace with hash 595985887, now seen corresponding path program 89 times [2020-12-22 04:36:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:07,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669547885] [2020-12-22 04:36:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:13,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669547885] [2020-12-22 04:36:13,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485037412] [2020-12-22 04:36:13,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:13,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2020-12-22 04:36:13,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:36:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:13,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:13,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2020-12-22 04:36:13,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960060929] [2020-12-22 04:36:13,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-22 04:36:13,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-22 04:36:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 04:36:13,438 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2020-12-22 04:36:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:14,013 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2020-12-22 04:36:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-22 04:36:14,014 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2020-12-22 04:36:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:14,015 INFO L225 Difference]: With dead ends: 192 [2020-12-22 04:36:14,015 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 04:36:14,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 04:36:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 04:36:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-22 04:36:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 04:36:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-12-22 04:36:14,019 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-12-22 04:36:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:14,019 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-12-22 04:36:14,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-22 04:36:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-12-22 04:36:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-22 04:36:14,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:14,021 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:14,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:14,235 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1565019361, now seen corresponding path program 90 times [2020-12-22 04:36:14,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:14,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558636810] [2020-12-22 04:36:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:20,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558636810] [2020-12-22 04:36:20,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047456325] [2020-12-22 04:36:20,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:20,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2020-12-22 04:36:20,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-22 04:36:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:20,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:20,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2020-12-22 04:36:20,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772206380] [2020-12-22 04:36:20,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-22 04:36:20,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:20,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-22 04:36:20,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 04:36:20,980 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2020-12-22 04:36:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:21,607 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2020-12-22 04:36:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-22 04:36:21,608 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2020-12-22 04:36:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:21,609 INFO L225 Difference]: With dead ends: 194 [2020-12-22 04:36:21,609 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 04:36:21,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 04:36:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 04:36:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-12-22 04:36:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 04:36:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-12-22 04:36:21,613 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-12-22 04:36:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:21,614 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-12-22 04:36:21,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-22 04:36:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-12-22 04:36:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 04:36:21,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:21,615 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:21,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:21,816 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash 798284643, now seen corresponding path program 91 times [2020-12-22 04:36:21,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:21,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821417386] [2020-12-22 04:36:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat