/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-acceleration/functions_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:25:05,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:25:05,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:25:05,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:25:05,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:25:05,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:25:05,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:25:05,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:25:05,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:25:05,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:25:05,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:25:05,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:25:05,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:25:05,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:25:05,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:25:05,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:25:05,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:25:05,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:25:05,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:25:05,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:25:05,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:25:05,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:25:05,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:25:05,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:25:05,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 04:25:05,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 04:25:05,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 04:25:05,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 04:25:05,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 04:25:05,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 04:25:05,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:25:05,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:25:05,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:25:05,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:25:05,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:25:05,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:25:05,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:25:05,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:25:05,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:25:05,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:25:05,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:25:05,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:25:05,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:25:05,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:25:05,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:25:05,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:25:05,801 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:25:05,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:25:05,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:25:05,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:25:05,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:25:05,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:25:05,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:25:05,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:25:05,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:25:05,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:25:05,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:25:05,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:25:05,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:25:05,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:25:05,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:25:05,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:25:05,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:25:05,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:25:05,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:25:05,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:25:05,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:25:05,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:25:06,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:25:06,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:25:06,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:25:06,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:25:06,248 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:25:06,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/functions_1-1.c [2020-12-22 04:25:06,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625abd8f6/498be96b1fad491789b42d65e89a2918/FLAGe992393b6 [2020-12-22 04:25:06,967 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:25:06,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-1.c [2020-12-22 04:25:06,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625abd8f6/498be96b1fad491789b42d65e89a2918/FLAGe992393b6 [2020-12-22 04:25:07,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625abd8f6/498be96b1fad491789b42d65e89a2918 [2020-12-22 04:25:07,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:25:07,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:25:07,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:25:07,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:25:07,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:25:07,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b17b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07, skipping insertion in model container [2020-12-22 04:25:07,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:25:07,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:25:07,564 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-acceleration/functions_1-1.c[325,338] [2020-12-22 04:25:07,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:25:07,587 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:25:07,603 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-acceleration/functions_1-1.c[325,338] [2020-12-22 04:25:07,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:25:07,624 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:25:07,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07 WrapperNode [2020-12-22 04:25:07,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:25:07,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:25:07,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:25:07,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:25:07,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:25:07,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:25:07,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:25:07,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:25:07,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (1/1) ... [2020-12-22 04:25:07,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:25:07,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:25:07,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:25:07,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:25:07,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (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 04:25:07,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:25:07,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:25:07,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:25:07,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:25:08,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:25:08,207 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 04:25:08,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:25:08 BoogieIcfgContainer [2020-12-22 04:25:08,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:25:08,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:25:08,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:25:08,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:25:08,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:25:07" (1/3) ... [2020-12-22 04:25:08,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5021ea33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:25:08, skipping insertion in model container [2020-12-22 04:25:08,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:25:07" (2/3) ... [2020-12-22 04:25:08,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5021ea33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:25:08, skipping insertion in model container [2020-12-22 04:25:08,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:25:08" (3/3) ... [2020-12-22 04:25:08,226 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-1.c [2020-12-22 04:25:08,238 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:25:08,243 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:25:08,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:25:08,333 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:25:08,333 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:25:08,333 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:25:08,333 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:25:08,334 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:25:08,334 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:25:08,334 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:25:08,334 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:25:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:25:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:25:08,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:08,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:25:08,360 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash 889635821, now seen corresponding path program 1 times [2020-12-22 04:25:08,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:08,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987726219] [2020-12-22 04:25:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:08,747 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 04:25:08,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987726219] [2020-12-22 04:25:08,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:25:08,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:25:08,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9752784] [2020-12-22 04:25:08,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:25:08,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:08,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:25:08,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:25:08,792 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-22 04:25:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:08,832 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:25:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:25:08,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:25:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:08,845 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:25:08,845 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:25:08,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 04:25:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:25:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-22 04:25:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:25:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:25:08,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-22 04:25:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:08,888 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:25:08,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:25:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:25:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:25:08,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:08,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:08,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:25:08,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:08,890 INFO L82 PathProgramCache]: Analyzing trace with hash 294764431, now seen corresponding path program 1 times [2020-12-22 04:25:08,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:08,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367333692] [2020-12-22 04:25:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:09,031 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 04:25:09,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367333692] [2020-12-22 04:25:09,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631137562] [2020-12-22 04:25:09,032 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 04:25:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:09,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:25:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:09,217 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 04:25:09,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:09,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:25:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602295806] [2020-12-22 04:25:09,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:25:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:09,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:25:09,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:25:09,223 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-22 04:25:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:09,311 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:25:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:25:09,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 04:25:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:09,313 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:25:09,313 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:25:09,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:25:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:25:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-22 04:25:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:25:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:25:09,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-22 04:25:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:09,319 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:25:09,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:25:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:25:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:25:09,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:09,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:09,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:25:09,536 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash -145990991, now seen corresponding path program 2 times [2020-12-22 04:25:09,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:09,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646095260] [2020-12-22 04:25:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:09,732 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 04:25:09,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646095260] [2020-12-22 04:25:09,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206303887] [2020-12-22 04:25:09,736 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 04:25:09,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:09,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:25:09,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:09,971 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 04:25:09,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:09,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:25:09,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315141585] [2020-12-22 04:25:09,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:25:09,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:25:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:25:09,976 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-22 04:25:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:10,195 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:25:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:25:10,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-22 04:25:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:10,197 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:25:10,197 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:25:10,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:25:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:25:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-22 04:25:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:25:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:25:10,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-22 04:25:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:10,211 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:25:10,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:25:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:25:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:25:10,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:10,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:10,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:10,428 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:10,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1489810771, now seen corresponding path program 3 times [2020-12-22 04:25:10,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:10,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081266351] [2020-12-22 04:25:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:10,707 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 04:25:10,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081266351] [2020-12-22 04:25:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886617988] [2020-12-22 04:25:10,708 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 04:25:10,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:25:10,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:25:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:10,859 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 04:25:10,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:10,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:25:10,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254317281] [2020-12-22 04:25:10,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:25:10,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:10,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:25:10,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:25:10,862 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-12-22 04:25:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:11,107 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:25:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:25:11,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-22 04:25:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:11,108 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:25:11,109 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:25:11,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:25:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:25:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:25:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:25:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:25:11,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-22 04:25:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:11,114 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:25:11,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:25:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:25:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:25:11,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:11,115 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:11,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:11,329 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1537273717, now seen corresponding path program 4 times [2020-12-22 04:25:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:11,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376206510] [2020-12-22 04:25:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:11,501 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 04:25:11,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376206510] [2020-12-22 04:25:11,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892817069] [2020-12-22 04:25:11,502 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 04:25:11,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:11,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:25:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:11,610 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 04:25:11,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:11,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:25:11,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858001107] [2020-12-22 04:25:11,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:25:11,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:11,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:25:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:25:11,613 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-22 04:25:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:11,847 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:25:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:25:11,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 04:25:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:11,849 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:25:11,850 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:25:11,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:25:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:25:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:25:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:25:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:25:11,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-22 04:25:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:11,856 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:25:11,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:25:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:25:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:25:11,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:11,857 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:12,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:12,072 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash -95475433, now seen corresponding path program 5 times [2020-12-22 04:25:12,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:12,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781146364] [2020-12-22 04:25:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:12,332 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 04:25:12,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781146364] [2020-12-22 04:25:12,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847521436] [2020-12-22 04:25:12,334 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 04:25:12,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:25:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:12,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:25:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:12,537 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 04:25:12,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:12,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:25:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941672469] [2020-12-22 04:25:12,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:25:12,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:25:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:25:12,546 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2020-12-22 04:25:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:12,859 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:25:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:25:12,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-22 04:25:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:12,862 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:25:12,862 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:25:12,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:25:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:25:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:25:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:25:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:25:12,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-22 04:25:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:12,869 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:25:12,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:25:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:25:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:25:12,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:12,870 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:13,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:25:13,086 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1504345543, now seen corresponding path program 6 times [2020-12-22 04:25:13,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:13,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200602840] [2020-12-22 04:25:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:13,388 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 04:25:13,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200602840] [2020-12-22 04:25:13,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111610600] [2020-12-22 04:25:13,389 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 04:25:13,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:25:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:13,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:25:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:13,554 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:25:13,584 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 04:25:13,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:13,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2020-12-22 04:25:13,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154795976] [2020-12-22 04:25:13,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:25:13,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:25:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:25:13,587 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 17 states. [2020-12-22 04:25:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:13,990 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:25:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:25:13,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2020-12-22 04:25:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:13,991 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:25:13,992 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:25:13,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:25:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:25:13,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-22 04:25:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:25:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:25:13,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-22 04:25:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:13,998 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:25:13,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:25:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:25:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:25:13,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:13,999 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:14,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:14,215 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1781144283, now seen corresponding path program 7 times [2020-12-22 04:25:14,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:14,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403974682] [2020-12-22 04:25:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:14,525 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 04:25:14,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403974682] [2020-12-22 04:25:14,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862209394] [2020-12-22 04:25:14,526 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 04:25:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:14,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:25:14,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:14,673 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 04:25:14,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:14,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:25:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589082918] [2020-12-22 04:25:14,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:25:14,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:25:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:25:14,681 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2020-12-22 04:25:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:15,190 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:25:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:25:15,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-22 04:25:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:15,192 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:25:15,192 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:25:15,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:25:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:25:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:25:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:25:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:25:15,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-22 04:25:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:15,199 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:25:15,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:25:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:25:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:25:15,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:15,200 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:15,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:15,413 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:15,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:15,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1959062787, now seen corresponding path program 8 times [2020-12-22 04:25:15,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:15,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226846915] [2020-12-22 04:25:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:15,751 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 04:25:15,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226846915] [2020-12-22 04:25:15,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695776884] [2020-12-22 04:25:15,752 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 04:25:15,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:15,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:15,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:25:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:15,889 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 04:25:15,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:15,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:25:15,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294847782] [2020-12-22 04:25:15,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:25:15,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:15,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:25:15,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:25:15,892 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-22 04:25:16,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:16,411 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:25:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:25:16,412 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-22 04:25:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:16,412 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:25:16,412 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:25:16,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:25:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:25:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-22 04:25:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:25:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:25:16,419 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-22 04:25:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:16,419 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:25:16,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:25:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:25:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:25:16,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:16,420 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:16,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:25:16,635 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:16,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1410430305, now seen corresponding path program 9 times [2020-12-22 04:25:16,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:16,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64112137] [2020-12-22 04:25:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:17,043 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 04:25:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64112137] [2020-12-22 04:25:17,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489342467] [2020-12-22 04:25:17,044 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 04:25:17,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:25:17,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:17,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:25:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:17,313 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 04:25:17,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:17,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:25:17,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35211719] [2020-12-22 04:25:17,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:25:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:25:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:25:17,316 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2020-12-22 04:25:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:17,994 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:25:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:25:17,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 04:25:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:17,996 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:25:17,996 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:25:17,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=1419, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:25:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:25:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 04:25:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:25:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:25:18,004 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-22 04:25:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:18,004 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:25:18,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:25:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:25:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:25:18,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:18,005 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:18,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:18,213 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:18,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1839374785, now seen corresponding path program 10 times [2020-12-22 04:25:18,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:18,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014366820] [2020-12-22 04:25:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:18,726 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 04:25:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014366820] [2020-12-22 04:25:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259406965] [2020-12-22 04:25:18,726 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 04:25:18,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:18,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:18,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:25:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:18,916 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 04:25:18,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:18,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:25:18,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966805201] [2020-12-22 04:25:18,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:25:18,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:18,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:25:18,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:25:18,921 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-22 04:25:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:19,744 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:25:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:25:19,744 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 04:25:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:19,745 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:25:19,745 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:25:19,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:25:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:25:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 04:25:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:25:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:25:19,752 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-22 04:25:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:19,753 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:25:19,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:25:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:25:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:25:19,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:19,754 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:19,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:19,966 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1834125213, now seen corresponding path program 11 times [2020-12-22 04:25:19,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:19,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529500667] [2020-12-22 04:25:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:20,513 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 04:25:20,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529500667] [2020-12-22 04:25:20,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154856866] [2020-12-22 04:25:20,514 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 04:25:20,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:25:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:20,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 04:25:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:21,049 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 04:25:21,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:21,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:25:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977304630] [2020-12-22 04:25:21,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:25:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:25:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:25:21,052 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-12-22 04:25:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:22,041 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:25:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:25:22,042 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-22 04:25:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:22,042 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:25:22,042 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:25:22,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:25:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:25:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 04:25:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:25:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:25:22,050 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-22 04:25:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:22,050 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:25:22,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:25:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:25:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:25:22,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:22,051 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:22,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:25:22,256 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1604505979, now seen corresponding path program 12 times [2020-12-22 04:25:22,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:22,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015304555] [2020-12-22 04:25:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:23,004 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 04:25:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015304555] [2020-12-22 04:25:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515592492] [2020-12-22 04:25:23,005 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 04:25:23,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:25:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:23,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 106 conjunts are in the unsatisfiable core [2020-12-22 04:25:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:23,420 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:25:23,468 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 04:25:23,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:23,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2020-12-22 04:25:23,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041966326] [2020-12-22 04:25:23,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:25:23,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:23,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:25:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:25:23,471 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 29 states. [2020-12-22 04:25:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:24,723 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:25:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:25:24,724 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2020-12-22 04:25:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:24,725 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:25:24,725 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:25:24,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=2568, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:25:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:25:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 04:25:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:25:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:25:24,732 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-22 04:25:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:24,733 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:25:24,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:25:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:25:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:25:24,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:24,734 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:24,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:25:24,937 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash 16245799, now seen corresponding path program 13 times [2020-12-22 04:25:24,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:24,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737807240] [2020-12-22 04:25:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:25,731 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 04:25:25,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737807240] [2020-12-22 04:25:25,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111909708] [2020-12-22 04:25:25,731 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 04:25:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:25,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 04:25:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:25,917 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 04:25:25,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:25,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:25:25,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339878814] [2020-12-22 04:25:25,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:25:25,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:25:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:25:25,920 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2020-12-22 04:25:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:27,309 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:25:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:25:27,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-22 04:25:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:27,314 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:25:27,314 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:25:27,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:25:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:25:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-22 04:25:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:25:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:25:27,321 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-22 04:25:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:27,321 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:25:27,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:25:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:25:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:25:27,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:27,323 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:27,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:25:27,537 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:27,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1514423991, now seen corresponding path program 14 times [2020-12-22 04:25:27,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:27,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911016741] [2020-12-22 04:25:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:28,363 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 04:25:28,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911016741] [2020-12-22 04:25:28,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274940398] [2020-12-22 04:25:28,364 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 04:25:28,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:28,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:28,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-22 04:25:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:28,542 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 04:25:28,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:28,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:25:28,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967702658] [2020-12-22 04:25:28,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:25:28,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:28,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:25:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:25:28,544 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2020-12-22 04:25:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:30,019 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:25:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:25:30,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-22 04:25:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:30,021 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:25:30,021 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:25:30,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:25:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:25:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-22 04:25:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:25:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:25:30,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-22 04:25:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:30,028 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:25:30,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:25:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:25:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:25:30,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:30,030 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:30,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:30,233 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash 685690347, now seen corresponding path program 15 times [2020-12-22 04:25:30,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:30,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107305860] [2020-12-22 04:25:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:31,220 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 04:25:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107305860] [2020-12-22 04:25:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551667207] [2020-12-22 04:25:31,220 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 04:25:31,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:25:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:31,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 133 conjunts are in the unsatisfiable core [2020-12-22 04:25:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:31,689 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 04:25:31,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:31,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:25:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770538200] [2020-12-22 04:25:31,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:25:31,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:31,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:25:31,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:25:31,692 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2020-12-22 04:25:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:33,317 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:25:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:25:33,317 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-22 04:25:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:33,318 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:25:33,318 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:25:33,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:25:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:25:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 04:25:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:25:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:25:33,326 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-22 04:25:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:33,326 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:25:33,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:25:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:25:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:25:33,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:33,327 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:33,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:25:33,532 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1871659533, now seen corresponding path program 16 times [2020-12-22 04:25:33,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:33,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290698666] [2020-12-22 04:25:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:34,634 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 04:25:34,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290698666] [2020-12-22 04:25:34,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782839646] [2020-12-22 04:25:34,635 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 04:25:34,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:25:34,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:34,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-22 04:25:34,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:34,823 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 04:25:34,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:34,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:25:34,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191057929] [2020-12-22 04:25:34,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:25:34,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:25:34,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:25:34,825 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2020-12-22 04:25:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:36,749 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:25:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:25:36,750 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-12-22 04:25:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:36,750 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:25:36,751 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:25:36,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=246, Invalid=4310, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:25:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:25:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:25:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:25:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:25:36,759 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-22 04:25:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:36,759 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:25:36,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:25:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:25:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:25:36,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:36,761 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:36,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:25:36,974 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:36,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:36,975 INFO L82 PathProgramCache]: Analyzing trace with hash -873253457, now seen corresponding path program 17 times [2020-12-22 04:25:36,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:36,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51032275] [2020-12-22 04:25:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:38,146 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 04:25:38,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51032275] [2020-12-22 04:25:38,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315016059] [2020-12-22 04:25:38,147 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 04:25:39,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:25:39,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:39,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 151 conjunts are in the unsatisfiable core [2020-12-22 04:25:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:39,677 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 04:25:39,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:39,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:25:39,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459772327] [2020-12-22 04:25:39,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:25:39,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:25:39,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:25:39,680 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-22 04:25:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:41,781 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:25:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:25:41,781 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-22 04:25:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:41,782 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:25:41,782 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:25:41,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=261, Invalid=4851, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:25:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:25:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 04:25:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:25:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:25:41,790 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-22 04:25:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:41,790 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:25:41,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:25:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:25:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:25:41,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:41,791 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:41,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:25:41,996 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1624717103, now seen corresponding path program 18 times [2020-12-22 04:25:41,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:41,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699282308] [2020-12-22 04:25:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:43,242 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 04:25:43,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699282308] [2020-12-22 04:25:43,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245621682] [2020-12-22 04:25:43,243 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 04:25:44,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:25:44,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:44,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 151 conjunts are in the unsatisfiable core [2020-12-22 04:25:44,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:44,347 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 04:25:44,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:44,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:25:44,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090865342] [2020-12-22 04:25:44,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:25:44,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:25:44,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:25:44,350 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2020-12-22 04:25:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:46,784 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:25:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:25:46,785 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-22 04:25:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:46,785 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:25:46,786 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:25:46,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=276, Invalid=5424, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 04:25:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:25:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-22 04:25:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:25:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:25:46,795 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-22 04:25:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:46,795 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:25:46,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:25:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:25:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:25:46,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:46,796 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:47,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:47,003 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2068192115, now seen corresponding path program 19 times [2020-12-22 04:25:47,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:47,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806174971] [2020-12-22 04:25:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:48,368 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 04:25:48,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806174971] [2020-12-22 04:25:48,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773047326] [2020-12-22 04:25:48,369 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 04:25:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:48,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 155 conjunts are in the unsatisfiable core [2020-12-22 04:25:48,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:48,604 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 04:25:48,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:48,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:25:48,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280272251] [2020-12-22 04:25:48,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:25:48,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:25:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:25:48,607 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2020-12-22 04:25:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:51,304 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:25:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:25:51,305 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-12-22 04:25:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:51,306 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:25:51,306 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:25:51,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=291, Invalid=6029, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 04:25:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:25:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:25:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:25:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:25:51,315 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-22 04:25:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:51,316 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:25:51,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:25:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:25:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:25:51,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:51,317 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:51,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:51,531 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash -984003179, now seen corresponding path program 20 times [2020-12-22 04:25:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:51,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891485088] [2020-12-22 04:25:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:53,036 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 04:25:53,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891485088] [2020-12-22 04:25:53,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351563149] [2020-12-22 04:25:53,037 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 04:25:53,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:25:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:53,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 163 conjunts are in the unsatisfiable core [2020-12-22 04:25:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:53,274 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 04:25:53,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:53,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:25:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454290614] [2020-12-22 04:25:53,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:25:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:25:53,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:25:53,277 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2020-12-22 04:25:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:56,251 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:25:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:25:56,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-12-22 04:25:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:56,252 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:25:56,253 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:25:56,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=306, Invalid=6666, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 04:25:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:25:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-22 04:25:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:25:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:25:56,264 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-22 04:25:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:56,264 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:25:56,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:25:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:25:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:25:56,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:56,265 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:56,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:25:56,471 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash -681017545, now seen corresponding path program 21 times [2020-12-22 04:25:56,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:56,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677759876] [2020-12-22 04:25:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:58,223 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 04:25:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677759876] [2020-12-22 04:25:58,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003109058] [2020-12-22 04:25:58,224 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 04:25:58,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:25:58,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:58,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 184 conjunts are in the unsatisfiable core [2020-12-22 04:25:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:59,424 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 04:25:59,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:59,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:25:59,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958380421] [2020-12-22 04:25:59,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:25:59,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:59,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:25:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:25:59,427 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 46 states. [2020-12-22 04:26:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:02,707 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:26:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:26:02,711 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 48 [2020-12-22 04:26:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:02,712 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:26:02,712 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:26:02,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=321, Invalid=7335, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 04:26:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:26:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-22 04:26:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:26:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:26:02,719 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-22 04:26:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:02,719 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:26:02,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:26:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:26:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:26:02,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:02,720 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:02,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:26:02,924 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:02,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1569599399, now seen corresponding path program 22 times [2020-12-22 04:26:02,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:02,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800935606] [2020-12-22 04:26:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:04,830 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 04:26:04,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800935606] [2020-12-22 04:26:04,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85939231] [2020-12-22 04:26:04,830 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 04:26:04,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:04,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 179 conjunts are in the unsatisfiable core [2020-12-22 04:26:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:05,053 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 04:26:05,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:05,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:26:05,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456053393] [2020-12-22 04:26:05,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:26:05,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:05,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:26:05,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:05,059 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 48 states. [2020-12-22 04:26:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:08,626 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:26:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:26:08,626 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 50 [2020-12-22 04:26:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:08,627 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:26:08,627 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:26:08,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=336, Invalid=8036, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 04:26:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:26:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:26:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:26:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:26:08,634 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-22 04:26:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:08,634 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:26:08,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:26:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:26:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:26:08,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:08,635 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:08,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:08,836 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash -798269189, now seen corresponding path program 23 times [2020-12-22 04:26:08,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:08,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260152128] [2020-12-22 04:26:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:10,876 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 04:26:10,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260152128] [2020-12-22 04:26:10,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700463901] [2020-12-22 04:26:10,877 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 04:26:12,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:26:12,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:12,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 207 conjunts are in the unsatisfiable core [2020-12-22 04:26:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:14,110 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 04:26:14,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:14,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:26:14,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184983965] [2020-12-22 04:26:14,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:26:14,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:14,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:26:14,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:26:14,113 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 50 states. [2020-12-22 04:26:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:17,803 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:26:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:26:17,804 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 52 [2020-12-22 04:26:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:17,804 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:26:17,804 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:26:17,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 32 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=351, Invalid=8769, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 04:26:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:26:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-22 04:26:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:26:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:26:17,820 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-22 04:26:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:17,820 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:26:17,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:26:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:26:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:26:17,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:17,825 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:18,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:26:18,031 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:18,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1715687709, now seen corresponding path program 24 times [2020-12-22 04:26:18,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:18,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356300174] [2020-12-22 04:26:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:20,190 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 04:26:20,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356300174] [2020-12-22 04:26:20,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589190130] [2020-12-22 04:26:20,191 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 04:26:21,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:26:21,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:21,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 202 conjunts are in the unsatisfiable core [2020-12-22 04:26:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:21,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:26:21,551 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 04:26:21,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:21,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52] total 53 [2020-12-22 04:26:21,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542365076] [2020-12-22 04:26:21,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:26:21,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:21,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:26:21,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2628, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:26:21,554 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 53 states. [2020-12-22 04:26:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:25,833 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:26:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:26:25,834 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 54 [2020-12-22 04:26:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:25,835 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:26:25,835 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:26:25,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=368, Invalid=9732, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 04:26:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:26:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-22 04:26:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:26:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:26:25,842 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-22 04:26:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:25,843 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:26:25,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:26:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:26:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:26:25,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:25,844 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:26,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:26,048 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:26,049 INFO L82 PathProgramCache]: Analyzing trace with hash -438320961, now seen corresponding path program 25 times [2020-12-22 04:26:26,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:26,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646348822] [2020-12-22 04:26:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:28,449 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 04:26:28,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646348822] [2020-12-22 04:26:28,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854517543] [2020-12-22 04:26:28,450 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 04:26:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:28,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 203 conjunts are in the unsatisfiable core [2020-12-22 04:26:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:28,714 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 04:26:28,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:28,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 04:26:28,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915955720] [2020-12-22 04:26:28,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:26:28,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:28,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:26:28,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:26:28,716 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 54 states. [2020-12-22 04:26:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:33,356 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:26:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:26:33,357 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 56 [2020-12-22 04:26:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:33,358 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:26:33,358 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:26:33,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=381, Invalid=10331, Unknown=0, NotChecked=0, Total=10712 [2020-12-22 04:26:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:26:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:26:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:26:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:26:33,364 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-22 04:26:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:33,364 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:26:33,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:26:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:26:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:26:33,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:33,365 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:33,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:26:33,580 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -266416159, now seen corresponding path program 26 times [2020-12-22 04:26:33,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:33,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687877935] [2020-12-22 04:26:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:36,204 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 04:26:36,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687877935] [2020-12-22 04:26:36,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274027867] [2020-12-22 04:26:36,205 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 04:26:36,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:36,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:36,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 211 conjunts are in the unsatisfiable core [2020-12-22 04:26:36,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:36,453 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 04:26:36,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:36,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 04:26:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087661632] [2020-12-22 04:26:36,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:26:36,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:26:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:26:36,455 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 56 states. [2020-12-22 04:26:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:41,375 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:26:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 04:26:41,376 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 58 [2020-12-22 04:26:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:41,376 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:26:41,376 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:26:41,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=396, Invalid=11160, Unknown=0, NotChecked=0, Total=11556 [2020-12-22 04:26:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:26:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 04:26:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:26:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:26:41,380 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-22 04:26:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:41,380 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:26:41,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:26:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:26:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:26:41,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:41,381 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:41,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:26:41,581 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1725341315, now seen corresponding path program 27 times [2020-12-22 04:26:41,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:41,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663504371] [2020-12-22 04:26:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:44,405 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 04:26:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663504371] [2020-12-22 04:26:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328573581] [2020-12-22 04:26:44,406 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 04:26:45,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:26:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:45,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 226 conjunts are in the unsatisfiable core [2020-12-22 04:26:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:45,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:26:45,280 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 04:26:45,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:45,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 59 [2020-12-22 04:26:45,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361876017] [2020-12-22 04:26:45,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:26:45,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:26:45,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:26:45,282 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 59 states. [2020-12-22 04:26:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:50,743 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:26:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:26:50,744 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 60 [2020-12-22 04:26:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:50,745 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:26:50,745 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:26:50,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=413, Invalid=12243, Unknown=0, NotChecked=0, Total=12656 [2020-12-22 04:26:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:26:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 04:26:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:26:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:26:50,750 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-22 04:26:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:50,750 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:26:50,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:26:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:26:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:26:50,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:50,751 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:50,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:26:50,955 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash 248859813, now seen corresponding path program 28 times [2020-12-22 04:26:50,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:50,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355242416] [2020-12-22 04:26:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:53,999 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 04:26:54,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355242416] [2020-12-22 04:26:54,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952361288] [2020-12-22 04:26:54,000 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 04:26:54,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:54,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:54,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 227 conjunts are in the unsatisfiable core [2020-12-22 04:26:54,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:54,284 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 04:26:54,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:54,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 04:26:54,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309536242] [2020-12-22 04:26:54,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:26:54,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:26:54,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:26:54,286 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 60 states. [2020-12-22 04:27:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:00,023 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:27:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 04:27:00,025 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 62 [2020-12-22 04:27:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:00,026 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:27:00,026 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:27:00,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=426, Invalid=12914, Unknown=0, NotChecked=0, Total=13340 [2020-12-22 04:27:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:27:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 04:27:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:27:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:27:00,032 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-22 04:27:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:00,032 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:27:00,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:27:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:27:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:27:00,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:00,033 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:00,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:27:00,244 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:00,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1310655929, now seen corresponding path program 29 times [2020-12-22 04:27:00,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:00,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998881693] [2020-12-22 04:27:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:03,460 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 04:27:03,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998881693] [2020-12-22 04:27:03,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035362555] [2020-12-22 04:27:03,460 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 04:27:19,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:27:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:19,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 253 conjunts are in the unsatisfiable core [2020-12-22 04:27:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:21,115 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 04:27:21,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:21,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 04:27:21,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673851229] [2020-12-22 04:27:21,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 04:27:21,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:21,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 04:27:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:27:21,117 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 62 states. [2020-12-22 04:27:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:27,283 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:27:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:27:27,284 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 64 [2020-12-22 04:27:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:27,285 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:27:27,285 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:27:27,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 46 SyntacticMatches, 19 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=441, Invalid=13839, Unknown=0, NotChecked=0, Total=14280 [2020-12-22 04:27:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:27:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-22 04:27:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:27:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:27:27,290 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-22 04:27:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:27,290 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:27:27,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 04:27:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:27:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:27:27,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:27,291 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:27,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:27,492 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:27,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1061697687, now seen corresponding path program 30 times [2020-12-22 04:27:27,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:27,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292261750] [2020-12-22 04:27:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:30,991 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 04:27:30,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292261750] [2020-12-22 04:27:30,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553619116] [2020-12-22 04:27:30,992 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 04:27:35,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:27:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:35,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 255 conjunts are in the unsatisfiable core [2020-12-22 04:27:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:35,936 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 04:27:35,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:35,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 04:27:35,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310133965] [2020-12-22 04:27:35,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 04:27:35,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 04:27:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 04:27:35,938 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 64 states. [2020-12-22 04:27:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:42,532 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:27:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 04:27:42,533 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 66 [2020-12-22 04:27:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:42,534 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:27:42,534 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:27:42,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=456, Invalid=14796, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 04:27:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:27:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-22 04:27:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:27:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-22 04:27:42,541 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-22 04:27:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:42,541 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-22 04:27:42,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 04:27:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-22 04:27:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:27:42,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:42,542 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:42,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:42,747 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:42,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1963971595, now seen corresponding path program 31 times [2020-12-22 04:27:42,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:42,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884843282] [2020-12-22 04:27:42,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:46,400 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 04:27:46,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884843282] [2020-12-22 04:27:46,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959054206] [2020-12-22 04:27:46,401 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 04:27:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:46,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 251 conjunts are in the unsatisfiable core [2020-12-22 04:27:46,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:46,695 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 04:27:46,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:46,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 04:27:46,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735037436] [2020-12-22 04:27:46,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 04:27:46,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:46,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 04:27:46,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:27:46,697 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 66 states. [2020-12-22 04:27:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:53,747 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:27:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 04:27:53,747 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 68 [2020-12-22 04:27:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:53,748 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:27:53,748 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:27:53,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=471, Invalid=15785, Unknown=0, NotChecked=0, Total=16256 [2020-12-22 04:27:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:27:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-22 04:27:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:27:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-22 04:27:53,755 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-22 04:27:53,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:53,755 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-22 04:27:53,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 04:27:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-22 04:27:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:27:53,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:53,756 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:53,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:53,972 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1939292205, now seen corresponding path program 32 times [2020-12-22 04:27:53,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:53,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082369949] [2020-12-22 04:27:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:57,952 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 04:27:57,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082369949] [2020-12-22 04:27:57,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451986979] [2020-12-22 04:27:57,952 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 04:27:58,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:58,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:58,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 259 conjunts are in the unsatisfiable core [2020-12-22 04:27:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:58,272 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 04:27:58,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:58,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 04:27:58,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117521153] [2020-12-22 04:27:58,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 04:27:58,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:58,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 04:27:58,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 04:27:58,274 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 68 states. [2020-12-22 04:28:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:05,826 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:28:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 04:28:05,827 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 70 [2020-12-22 04:28:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:05,828 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:28:05,828 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:28:05,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=486, Invalid=16806, Unknown=0, NotChecked=0, Total=17292 [2020-12-22 04:28:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:28:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-22 04:28:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:28:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-22 04:28:05,833 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-22 04:28:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:05,833 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-22 04:28:05,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 04:28:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-22 04:28:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:28:05,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:05,834 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:06,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:28:06,035 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash -302765105, now seen corresponding path program 33 times [2020-12-22 04:28:06,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:06,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461893384] [2020-12-22 04:28:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:10,292 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 04:28:10,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461893384] [2020-12-22 04:28:10,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134504531] [2020-12-22 04:28:10,292 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 04:28:11,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:28:11,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:11,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 283 conjunts are in the unsatisfiable core [2020-12-22 04:28:11,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:12,941 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 04:28:12,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:12,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 04:28:12,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244032680] [2020-12-22 04:28:12,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 04:28:12,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:12,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 04:28:12,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:28:12,943 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 70 states. [2020-12-22 04:28:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:21,136 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:28:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:28:21,137 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 72 [2020-12-22 04:28:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:21,138 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:28:21,138 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:28:21,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=501, Invalid=17859, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 04:28:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:28:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-22 04:28:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:28:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 04:28:21,143 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-22 04:28:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:21,144 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 04:28:21,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 04:28:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 04:28:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:28:21,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:21,144 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:21,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:21,345 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1153742577, now seen corresponding path program 34 times [2020-12-22 04:28:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:21,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497571110] [2020-12-22 04:28:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:25,933 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 04:28:25,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497571110] [2020-12-22 04:28:25,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821365502] [2020-12-22 04:28:25,934 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 04:28:26,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:28:26,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:26,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 275 conjunts are in the unsatisfiable core [2020-12-22 04:28:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:26,284 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 04:28:26,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:26,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 04:28:26,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398999376] [2020-12-22 04:28:26,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 04:28:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 04:28:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 04:28:26,286 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 72 states. [2020-12-22 04:28:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:35,152 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:28:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 04:28:35,154 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 74 [2020-12-22 04:28:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:35,154 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:28:35,154 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:28:35,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=516, Invalid=18944, Unknown=0, NotChecked=0, Total=19460 [2020-12-22 04:28:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:28:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-22 04:28:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:28:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-22 04:28:35,160 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-22 04:28:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:35,160 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-22 04:28:35,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 04:28:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-22 04:28:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:28:35,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:35,161 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:35,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:28:35,362 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash 698286483, now seen corresponding path program 35 times [2020-12-22 04:28:35,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:35,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830779033] [2020-12-22 04:28:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:40,174 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 04:28:40,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830779033] [2020-12-22 04:28:40,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344957761] [2020-12-22 04:28:40,175 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 04:29:11,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:29:11,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:11,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 312 conjunts are in the unsatisfiable core [2020-12-22 04:29:11,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:14,547 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 04:29:14,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:14,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 04:29:14,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8138246] [2020-12-22 04:29:14,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 04:29:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:14,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 04:29:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:29:14,549 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 74 states.