/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/product-lines/elevator_spec9_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:14:26,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:14:26,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:14:26,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:14:26,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:14:26,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:14:26,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:14:26,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:14:26,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:14:26,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:14:26,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:14:26,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:14:26,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:14:26,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:14:26,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:14:26,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:14:26,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:14:26,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:14:26,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:14:26,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:14:26,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:14:26,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:14:26,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:14:26,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:14:26,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:14:26,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:14:26,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:14:26,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:14:26,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:14:26,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:14:26,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:14:26,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:14:26,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:14:26,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:14:26,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:14:26,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:14:26,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:14:26,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:14:26,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:14:26,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:14:26,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:14:26,722 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:14:26,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:14:26,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:14:26,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:14:26,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:14:26,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:14:26,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:14:26,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:14:26,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:14:26,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:14:26,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:14:26,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:14:26,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:14:26,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:14:26,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:14:26,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:14:26,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:14:26,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:14:26,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:14:26,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:14:26,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:14:26,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:14:27,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:14:27,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:14:27,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:14:27,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:14:27,283 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:14:27,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2020-12-22 06:14:27,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de39189e/c1a000208f1746a690c4b4dfb1a3b8c7/FLAG867601497 [2020-12-22 06:14:28,202 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:14:28,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2020-12-22 06:14:28,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de39189e/c1a000208f1746a690c4b4dfb1a3b8c7/FLAG867601497 [2020-12-22 06:14:28,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de39189e/c1a000208f1746a690c4b4dfb1a3b8c7 [2020-12-22 06:14:28,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:14:28,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:14:28,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:14:28,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:14:28,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:14:28,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:14:28" (1/1) ... [2020-12-22 06:14:28,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a144f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:28, skipping insertion in model container [2020-12-22 06:14:28,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:14:28" (1/1) ... [2020-12-22 06:14:28,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:14:28,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:14:28,806 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/product-lines/elevator_spec9_product31.cil.c[5586,5599] [2020-12-22 06:14:29,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:14:29,401 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:14:29,447 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/product-lines/elevator_spec9_product31.cil.c[5586,5599] [2020-12-22 06:14:29,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:14:29,696 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:14:29,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29 WrapperNode [2020-12-22 06:14:29,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:14:29,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:14:29,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:14:29,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:14:29,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:29,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:14:30,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:14:30,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:14:30,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:14:30,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (1/1) ... [2020-12-22 06:14:30,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:14:30,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:14:30,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:14:30,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:14:30,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (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 06:14:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:14:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:14:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:14:30,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:14:39,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:14:39,566 INFO L299 CfgBuilder]: Removed 881 assume(true) statements. [2020-12-22 06:14:39,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:39 BoogieIcfgContainer [2020-12-22 06:14:39,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:14:39,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:14:39,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:14:39,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:14:39,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:14:28" (1/3) ... [2020-12-22 06:14:39,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d04fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:39, skipping insertion in model container [2020-12-22 06:14:39,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:29" (2/3) ... [2020-12-22 06:14:39,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d04fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:39, skipping insertion in model container [2020-12-22 06:14:39,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:39" (3/3) ... [2020-12-22 06:14:39,583 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product31.cil.c [2020-12-22 06:14:39,590 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:14:39,598 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:14:39,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:14:39,666 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:14:39,666 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:14:39,666 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:14:39,666 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:14:39,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:14:39,667 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:14:39,667 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:14:39,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:14:39,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states. [2020-12-22 06:14:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 06:14:39,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:39,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:39,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:39,780 INFO L82 PathProgramCache]: Analyzing trace with hash -481518765, now seen corresponding path program 1 times [2020-12-22 06:14:39,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:39,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590741895] [2020-12-22 06:14:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:40,231 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 06:14:40,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590741895] [2020-12-22 06:14:40,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:40,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:40,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050307915] [2020-12-22 06:14:40,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:14:40,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:14:40,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:40,260 INFO L87 Difference]: Start difference. First operand 3676 states. Second operand 3 states. [2020-12-22 06:14:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:40,543 INFO L93 Difference]: Finished difference Result 7343 states and 13833 transitions. [2020-12-22 06:14:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:14:40,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 06:14:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:40,615 INFO L225 Difference]: With dead ends: 7343 [2020-12-22 06:14:40,616 INFO L226 Difference]: Without dead ends: 3672 [2020-12-22 06:14:40,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2020-12-22 06:14:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3672. [2020-12-22 06:14:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3672 states. [2020-12-22 06:14:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 6907 transitions. [2020-12-22 06:14:40,871 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 6907 transitions. Word has length 43 [2020-12-22 06:14:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:40,872 INFO L481 AbstractCegarLoop]: Abstraction has 3672 states and 6907 transitions. [2020-12-22 06:14:40,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:14:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 6907 transitions. [2020-12-22 06:14:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:14:40,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:40,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:40,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:14:40,880 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash -900077320, now seen corresponding path program 1 times [2020-12-22 06:14:40,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:40,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843349624] [2020-12-22 06:14:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:41,070 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 06:14:41,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843349624] [2020-12-22 06:14:41,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:41,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:41,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581325206] [2020-12-22 06:14:41,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:41,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:41,075 INFO L87 Difference]: Start difference. First operand 3672 states and 6907 transitions. Second operand 4 states. [2020-12-22 06:14:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:41,302 INFO L93 Difference]: Finished difference Result 7295 states and 13730 transitions. [2020-12-22 06:14:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:41,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-12-22 06:14:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:41,329 INFO L225 Difference]: With dead ends: 7295 [2020-12-22 06:14:41,329 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:14:41,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:14:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:14:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:14:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6851 transitions. [2020-12-22 06:14:41,483 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6851 transitions. Word has length 50 [2020-12-22 06:14:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:41,484 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6851 transitions. [2020-12-22 06:14:41,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6851 transitions. [2020-12-22 06:14:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:14:41,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:41,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:41,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:14:41,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1722261270, now seen corresponding path program 1 times [2020-12-22 06:14:41,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:41,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493416310] [2020-12-22 06:14:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:41,701 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 06:14:41,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493416310] [2020-12-22 06:14:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:41,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095625840] [2020-12-22 06:14:41,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:41,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:41,711 INFO L87 Difference]: Start difference. First operand 3645 states and 6851 transitions. Second operand 4 states. [2020-12-22 06:14:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:42,045 INFO L93 Difference]: Finished difference Result 7268 states and 13674 transitions. [2020-12-22 06:14:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:42,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-12-22 06:14:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:42,069 INFO L225 Difference]: With dead ends: 7268 [2020-12-22 06:14:42,069 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:14:42,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:14:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:14:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:14:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6850 transitions. [2020-12-22 06:14:42,232 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6850 transitions. Word has length 51 [2020-12-22 06:14:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:42,240 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6850 transitions. [2020-12-22 06:14:42,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6850 transitions. [2020-12-22 06:14:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:14:42,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:42,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:42,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:14:42,247 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:42,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1174252453, now seen corresponding path program 1 times [2020-12-22 06:14:42,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:42,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477403085] [2020-12-22 06:14:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:42,391 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 06:14:42,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477403085] [2020-12-22 06:14:42,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:42,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:42,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671316636] [2020-12-22 06:14:42,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:42,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:42,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:42,397 INFO L87 Difference]: Start difference. First operand 3645 states and 6850 transitions. Second operand 4 states. [2020-12-22 06:14:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:42,636 INFO L93 Difference]: Finished difference Result 7268 states and 13673 transitions. [2020-12-22 06:14:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:42,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:14:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:42,662 INFO L225 Difference]: With dead ends: 7268 [2020-12-22 06:14:42,662 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:14:42,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:14:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:14:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:14:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6849 transitions. [2020-12-22 06:14:42,826 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6849 transitions. Word has length 52 [2020-12-22 06:14:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:42,826 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6849 transitions. [2020-12-22 06:14:42,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6849 transitions. [2020-12-22 06:14:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:14:42,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:42,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:42,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:14:42,834 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash -734394757, now seen corresponding path program 1 times [2020-12-22 06:14:42,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:42,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132188655] [2020-12-22 06:14:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:42,936 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 06:14:42,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132188655] [2020-12-22 06:14:42,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:42,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:42,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122328843] [2020-12-22 06:14:42,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:42,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:42,940 INFO L87 Difference]: Start difference. First operand 3645 states and 6849 transitions. Second operand 4 states. [2020-12-22 06:14:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:43,170 INFO L93 Difference]: Finished difference Result 7268 states and 13672 transitions. [2020-12-22 06:14:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:43,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:14:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:43,198 INFO L225 Difference]: With dead ends: 7268 [2020-12-22 06:14:43,199 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:14:43,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:14:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:14:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:14:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6848 transitions. [2020-12-22 06:14:43,359 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6848 transitions. Word has length 53 [2020-12-22 06:14:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:43,359 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6848 transitions. [2020-12-22 06:14:43,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6848 transitions. [2020-12-22 06:14:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:14:43,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:43,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:43,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:14:43,365 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash 53761824, now seen corresponding path program 1 times [2020-12-22 06:14:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:43,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848976830] [2020-12-22 06:14:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:43,490 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 06:14:43,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848976830] [2020-12-22 06:14:43,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:43,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:43,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961347171] [2020-12-22 06:14:43,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:43,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:43,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:43,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:43,493 INFO L87 Difference]: Start difference. First operand 3645 states and 6848 transitions. Second operand 4 states. [2020-12-22 06:14:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:43,843 INFO L93 Difference]: Finished difference Result 7268 states and 13671 transitions. [2020-12-22 06:14:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:43,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:14:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:43,891 INFO L225 Difference]: With dead ends: 7268 [2020-12-22 06:14:43,892 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:14:43,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:14:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:14:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:14:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6847 transitions. [2020-12-22 06:14:44,068 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6847 transitions. Word has length 54 [2020-12-22 06:14:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:44,068 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6847 transitions. [2020-12-22 06:14:44,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6847 transitions. [2020-12-22 06:14:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:14:44,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:44,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:44,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:14:44,073 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1245718048, now seen corresponding path program 1 times [2020-12-22 06:14:44,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:44,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901370167] [2020-12-22 06:14:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:44,166 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 06:14:44,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901370167] [2020-12-22 06:14:44,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:44,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:44,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201538154] [2020-12-22 06:14:44,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:44,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:44,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:44,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:44,170 INFO L87 Difference]: Start difference. First operand 3645 states and 6847 transitions. Second operand 4 states. [2020-12-22 06:14:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:44,407 INFO L93 Difference]: Finished difference Result 7268 states and 13670 transitions. [2020-12-22 06:14:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:44,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:14:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:44,419 INFO L225 Difference]: With dead ends: 7268 [2020-12-22 06:14:44,419 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:14:44,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:14:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:14:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:14:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6846 transitions. [2020-12-22 06:14:44,600 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6846 transitions. Word has length 55 [2020-12-22 06:14:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:44,600 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6846 transitions. [2020-12-22 06:14:44,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6846 transitions. [2020-12-22 06:14:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:14:44,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:44,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:44,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:14:44,605 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:44,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1457548773, now seen corresponding path program 1 times [2020-12-22 06:14:44,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:44,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648215190] [2020-12-22 06:14:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:44,730 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 06:14:44,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648215190] [2020-12-22 06:14:44,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:44,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:44,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73180494] [2020-12-22 06:14:44,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:44,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:44,734 INFO L87 Difference]: Start difference. First operand 3645 states and 6846 transitions. Second operand 4 states. [2020-12-22 06:14:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:44,968 INFO L93 Difference]: Finished difference Result 7262 states and 13658 transitions. [2020-12-22 06:14:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:44,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-12-22 06:14:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:44,982 INFO L225 Difference]: With dead ends: 7262 [2020-12-22 06:14:44,982 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:14:44,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:14:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:14:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:14:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:14:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6845 transitions. [2020-12-22 06:14:45,162 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6845 transitions. Word has length 56 [2020-12-22 06:14:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:45,163 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6845 transitions. [2020-12-22 06:14:45,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6845 transitions. [2020-12-22 06:14:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:14:45,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:45,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:45,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:14:45,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:45,168 INFO L82 PathProgramCache]: Analyzing trace with hash -880308715, now seen corresponding path program 1 times [2020-12-22 06:14:45,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:45,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088635484] [2020-12-22 06:14:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:45,292 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 06:14:45,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088635484] [2020-12-22 06:14:45,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:45,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:14:45,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556035840] [2020-12-22 06:14:45,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:45,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:45,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:45,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:45,303 INFO L87 Difference]: Start difference. First operand 3645 states and 6845 transitions. Second operand 6 states. [2020-12-22 06:14:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:51,650 INFO L93 Difference]: Finished difference Result 25109 states and 47047 transitions. [2020-12-22 06:14:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:14:51,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-12-22 06:14:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:51,714 INFO L225 Difference]: With dead ends: 25109 [2020-12-22 06:14:51,714 INFO L226 Difference]: Without dead ends: 21525 [2020-12-22 06:14:51,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:14:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21525 states. [2020-12-22 06:14:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21525 to 3651. [2020-12-22 06:14:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3651 states. [2020-12-22 06:14:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 6851 transitions. [2020-12-22 06:14:52,099 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 6851 transitions. Word has length 57 [2020-12-22 06:14:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:52,099 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 6851 transitions. [2020-12-22 06:14:52,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 6851 transitions. [2020-12-22 06:14:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:14:52,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:52,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:52,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:14:52,104 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:14:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:52,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1401699421, now seen corresponding path program 1 times [2020-12-22 06:14:52,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:52,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592444792] [2020-12-22 06:14:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:52,205 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 06:14:52,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592444792] [2020-12-22 06:14:52,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:52,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:14:52,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328176067] [2020-12-22 06:14:52,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:14:52,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:14:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:52,208 INFO L87 Difference]: Start difference. First operand 3651 states and 6851 transitions. Second operand 7 states. [2020-12-22 06:15:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:00,580 INFO L93 Difference]: Finished difference Result 15698 states and 29435 transitions. [2020-12-22 06:15:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 06:15:00,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-12-22 06:15:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:00,616 INFO L225 Difference]: With dead ends: 15698 [2020-12-22 06:15:00,617 INFO L226 Difference]: Without dead ends: 12086 [2020-12-22 06:15:00,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-22 06:15:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2020-12-22 06:15:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 4605. [2020-12-22 06:15:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4605 states. [2020-12-22 06:15:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 8377 transitions. [2020-12-22 06:15:00,931 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 8377 transitions. Word has length 58 [2020-12-22 06:15:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:00,932 INFO L481 AbstractCegarLoop]: Abstraction has 4605 states and 8377 transitions. [2020-12-22 06:15:00,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:15:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 8377 transitions. [2020-12-22 06:15:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:15:00,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:00,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:00,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:15:00,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 424915985, now seen corresponding path program 1 times [2020-12-22 06:15:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:00,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112019901] [2020-12-22 06:15:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:01,060 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 06:15:01,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112019901] [2020-12-22 06:15:01,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:01,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:15:01,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489954779] [2020-12-22 06:15:01,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:15:01,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:01,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:15:01,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:15:01,064 INFO L87 Difference]: Start difference. First operand 4605 states and 8377 transitions. Second operand 4 states. [2020-12-22 06:15:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:03,123 INFO L93 Difference]: Finished difference Result 12530 states and 22978 transitions. [2020-12-22 06:15:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:15:03,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 06:15:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:03,147 INFO L225 Difference]: With dead ends: 12530 [2020-12-22 06:15:03,147 INFO L226 Difference]: Without dead ends: 7962 [2020-12-22 06:15:03,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:15:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2020-12-22 06:15:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 4605. [2020-12-22 06:15:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4605 states. [2020-12-22 06:15:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 8368 transitions. [2020-12-22 06:15:03,447 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 8368 transitions. Word has length 59 [2020-12-22 06:15:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:03,447 INFO L481 AbstractCegarLoop]: Abstraction has 4605 states and 8368 transitions. [2020-12-22 06:15:03,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:15:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 8368 transitions. [2020-12-22 06:15:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:15:03,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:03,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:03,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:15:03,450 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1499723551, now seen corresponding path program 1 times [2020-12-22 06:15:03,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:03,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078435809] [2020-12-22 06:15:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:03,533 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 06:15:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078435809] [2020-12-22 06:15:03,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:03,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384450164] [2020-12-22 06:15:03,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:03,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:03,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:03,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:03,535 INFO L87 Difference]: Start difference. First operand 4605 states and 8368 transitions. Second operand 6 states. [2020-12-22 06:15:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:11,695 INFO L93 Difference]: Finished difference Result 54786 states and 99480 transitions. [2020-12-22 06:15:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 06:15:11,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 06:15:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:11,824 INFO L225 Difference]: With dead ends: 54786 [2020-12-22 06:15:11,824 INFO L226 Difference]: Without dead ends: 50245 [2020-12-22 06:15:11,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 06:15:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50245 states. [2020-12-22 06:15:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50245 to 9167. [2020-12-22 06:15:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9167 states. [2020-12-22 06:15:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9167 states to 9167 states and 16689 transitions. [2020-12-22 06:15:12,929 INFO L78 Accepts]: Start accepts. Automaton has 9167 states and 16689 transitions. Word has length 61 [2020-12-22 06:15:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:12,929 INFO L481 AbstractCegarLoop]: Abstraction has 9167 states and 16689 transitions. [2020-12-22 06:15:12,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 9167 states and 16689 transitions. [2020-12-22 06:15:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:15:12,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:12,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:12,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:15:12,934 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2116928007, now seen corresponding path program 1 times [2020-12-22 06:15:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:12,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523106555] [2020-12-22 06:15:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:13,045 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 06:15:13,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523106555] [2020-12-22 06:15:13,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:13,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:13,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045748172] [2020-12-22 06:15:13,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:13,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:13,048 INFO L87 Difference]: Start difference. First operand 9167 states and 16689 transitions. Second operand 6 states. [2020-12-22 06:15:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:23,702 INFO L93 Difference]: Finished difference Result 84323 states and 153240 transitions. [2020-12-22 06:15:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 06:15:23,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-22 06:15:23,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:23,878 INFO L225 Difference]: With dead ends: 84323 [2020-12-22 06:15:23,878 INFO L226 Difference]: Without dead ends: 75256 [2020-12-22 06:15:23,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 06:15:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75256 states. [2020-12-22 06:15:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75256 to 13729. [2020-12-22 06:15:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13729 states. [2020-12-22 06:15:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13729 states to 13729 states and 25010 transitions. [2020-12-22 06:15:25,472 INFO L78 Accepts]: Start accepts. Automaton has 13729 states and 25010 transitions. Word has length 62 [2020-12-22 06:15:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:25,472 INFO L481 AbstractCegarLoop]: Abstraction has 13729 states and 25010 transitions. [2020-12-22 06:15:25,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 13729 states and 25010 transitions. [2020-12-22 06:15:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:15:25,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:25,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:25,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:15:25,480 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash 73438836, now seen corresponding path program 1 times [2020-12-22 06:15:25,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:25,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082263874] [2020-12-22 06:15:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:25,555 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 06:15:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082263874] [2020-12-22 06:15:25,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:25,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:25,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255865639] [2020-12-22 06:15:25,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:15:25,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:25,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:15:25,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:15:25,558 INFO L87 Difference]: Start difference. First operand 13729 states and 25010 transitions. Second operand 5 states. [2020-12-22 06:15:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:25,922 INFO L93 Difference]: Finished difference Result 18306 states and 33345 transitions. [2020-12-22 06:15:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:15:25,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 06:15:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:25,932 INFO L225 Difference]: With dead ends: 18306 [2020-12-22 06:15:25,933 INFO L226 Difference]: Without dead ends: 4602 [2020-12-22 06:15:25,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:15:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2020-12-22 06:15:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2020-12-22 06:15:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4602 states. [2020-12-22 06:15:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 8361 transitions. [2020-12-22 06:15:26,410 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 8361 transitions. Word has length 62 [2020-12-22 06:15:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:26,411 INFO L481 AbstractCegarLoop]: Abstraction has 4602 states and 8361 transitions. [2020-12-22 06:15:26,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:15:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 8361 transitions. [2020-12-22 06:15:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:15:26,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:26,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:26,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:15:26,414 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1741946916, now seen corresponding path program 1 times [2020-12-22 06:15:26,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:26,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586197998] [2020-12-22 06:15:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:26,485 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 06:15:26,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586197998] [2020-12-22 06:15:26,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:26,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:26,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716324307] [2020-12-22 06:15:26,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:26,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:26,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:26,488 INFO L87 Difference]: Start difference. First operand 4602 states and 8361 transitions. Second operand 6 states. [2020-12-22 06:15:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:30,156 INFO L93 Difference]: Finished difference Result 20881 states and 38194 transitions. [2020-12-22 06:15:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:15:30,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 06:15:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:30,178 INFO L225 Difference]: With dead ends: 20881 [2020-12-22 06:15:30,178 INFO L226 Difference]: Without dead ends: 16340 [2020-12-22 06:15:30,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 06:15:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16340 states. [2020-12-22 06:15:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16340 to 4563. [2020-12-22 06:15:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4563 states. [2020-12-22 06:15:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 8300 transitions. [2020-12-22 06:15:30,513 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 8300 transitions. Word has length 63 [2020-12-22 06:15:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:30,513 INFO L481 AbstractCegarLoop]: Abstraction has 4563 states and 8300 transitions. [2020-12-22 06:15:30,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 8300 transitions. [2020-12-22 06:15:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:15:30,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:30,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:30,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:15:30,516 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2027285394, now seen corresponding path program 1 times [2020-12-22 06:15:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:30,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660306037] [2020-12-22 06:15:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:30,601 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 06:15:30,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660306037] [2020-12-22 06:15:30,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:30,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:30,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410964233] [2020-12-22 06:15:30,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:30,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:30,607 INFO L87 Difference]: Start difference. First operand 4563 states and 8300 transitions. Second operand 6 states. [2020-12-22 06:15:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:34,138 INFO L93 Difference]: Finished difference Result 22577 states and 41414 transitions. [2020-12-22 06:15:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:15:34,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 06:15:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:34,166 INFO L225 Difference]: With dead ends: 22577 [2020-12-22 06:15:34,167 INFO L226 Difference]: Without dead ends: 20331 [2020-12-22 06:15:34,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:15:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20331 states. [2020-12-22 06:15:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20331 to 4581. [2020-12-22 06:15:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4581 states. [2020-12-22 06:15:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 8318 transitions. [2020-12-22 06:15:34,590 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 8318 transitions. Word has length 64 [2020-12-22 06:15:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:34,590 INFO L481 AbstractCegarLoop]: Abstraction has 4581 states and 8318 transitions. [2020-12-22 06:15:34,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 8318 transitions. [2020-12-22 06:15:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:15:34,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:34,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:34,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:15:34,593 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash 456753798, now seen corresponding path program 1 times [2020-12-22 06:15:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:34,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397380800] [2020-12-22 06:15:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:34,676 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 06:15:34,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397380800] [2020-12-22 06:15:34,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:34,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:34,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602793174] [2020-12-22 06:15:34,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:34,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:34,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:34,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:34,679 INFO L87 Difference]: Start difference. First operand 4581 states and 8318 transitions. Second operand 6 states. [2020-12-22 06:15:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:39,153 INFO L93 Difference]: Finished difference Result 22625 states and 41462 transitions. [2020-12-22 06:15:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:15:39,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 06:15:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:39,183 INFO L225 Difference]: With dead ends: 22625 [2020-12-22 06:15:39,184 INFO L226 Difference]: Without dead ends: 20367 [2020-12-22 06:15:39,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:15:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20367 states. [2020-12-22 06:15:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20367 to 4581. [2020-12-22 06:15:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4581 states. [2020-12-22 06:15:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 8318 transitions. [2020-12-22 06:15:39,529 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 8318 transitions. Word has length 65 [2020-12-22 06:15:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:39,529 INFO L481 AbstractCegarLoop]: Abstraction has 4581 states and 8318 transitions. [2020-12-22 06:15:39,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 8318 transitions. [2020-12-22 06:15:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:15:39,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:39,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:39,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:15:39,531 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:39,532 INFO L82 PathProgramCache]: Analyzing trace with hash 71669143, now seen corresponding path program 1 times [2020-12-22 06:15:39,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:39,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913469623] [2020-12-22 06:15:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:39,614 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 06:15:39,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913469623] [2020-12-22 06:15:39,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:39,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:39,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104925440] [2020-12-22 06:15:39,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:39,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:39,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:39,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:39,616 INFO L87 Difference]: Start difference. First operand 4581 states and 8318 transitions. Second operand 6 states. [2020-12-22 06:15:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:43,576 INFO L93 Difference]: Finished difference Result 18655 states and 34021 transitions. [2020-12-22 06:15:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:15:43,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 06:15:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:43,600 INFO L225 Difference]: With dead ends: 18655 [2020-12-22 06:15:43,600 INFO L226 Difference]: Without dead ends: 16397 [2020-12-22 06:15:43,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:15:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16397 states. [2020-12-22 06:15:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16397 to 4557. [2020-12-22 06:15:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4557 states. [2020-12-22 06:15:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 8288 transitions. [2020-12-22 06:15:43,914 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 8288 transitions. Word has length 66 [2020-12-22 06:15:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:43,915 INFO L481 AbstractCegarLoop]: Abstraction has 4557 states and 8288 transitions. [2020-12-22 06:15:43,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:15:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 8288 transitions. [2020-12-22 06:15:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:15:43,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:43,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:43,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:15:43,917 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:43,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1772667488, now seen corresponding path program 1 times [2020-12-22 06:15:43,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:43,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479638889] [2020-12-22 06:15:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:43,980 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 06:15:43,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479638889] [2020-12-22 06:15:43,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:43,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:43,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472858800] [2020-12-22 06:15:43,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:43,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:43,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:43,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:43,983 INFO L87 Difference]: Start difference. First operand 4557 states and 8288 transitions. Second operand 3 states. [2020-12-22 06:15:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:44,574 INFO L93 Difference]: Finished difference Result 11849 states and 21599 transitions. [2020-12-22 06:15:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:44,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:15:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:44,586 INFO L225 Difference]: With dead ends: 11849 [2020-12-22 06:15:44,587 INFO L226 Difference]: Without dead ends: 8272 [2020-12-22 06:15:44,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8272 states. [2020-12-22 06:15:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8272 to 8257. [2020-12-22 06:15:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8257 states. [2020-12-22 06:15:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 15103 transitions. [2020-12-22 06:15:45,020 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 15103 transitions. Word has length 70 [2020-12-22 06:15:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:45,020 INFO L481 AbstractCegarLoop]: Abstraction has 8257 states and 15103 transitions. [2020-12-22 06:15:45,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 15103 transitions. [2020-12-22 06:15:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:15:45,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:45,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:45,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:15:45,024 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 383704964, now seen corresponding path program 1 times [2020-12-22 06:15:45,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:45,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286879712] [2020-12-22 06:15:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:45,092 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 06:15:45,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286879712] [2020-12-22 06:15:45,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:45,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:45,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22503281] [2020-12-22 06:15:45,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:45,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:45,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:45,094 INFO L87 Difference]: Start difference. First operand 8257 states and 15103 transitions. Second operand 3 states. [2020-12-22 06:15:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:46,129 INFO L93 Difference]: Finished difference Result 22241 states and 40691 transitions. [2020-12-22 06:15:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:46,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:15:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:46,149 INFO L225 Difference]: With dead ends: 22241 [2020-12-22 06:15:46,149 INFO L226 Difference]: Without dead ends: 15579 [2020-12-22 06:15:46,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15579 states. [2020-12-22 06:15:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15579 to 15564. [2020-12-22 06:15:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15564 states. [2020-12-22 06:15:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15564 states to 15564 states and 28524 transitions. [2020-12-22 06:15:46,977 INFO L78 Accepts]: Start accepts. Automaton has 15564 states and 28524 transitions. Word has length 71 [2020-12-22 06:15:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:46,977 INFO L481 AbstractCegarLoop]: Abstraction has 15564 states and 28524 transitions. [2020-12-22 06:15:46,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15564 states and 28524 transitions. [2020-12-22 06:15:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:15:46,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:46,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:46,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:15:46,980 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash 440629349, now seen corresponding path program 1 times [2020-12-22 06:15:46,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:46,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204076207] [2020-12-22 06:15:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:47,041 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 06:15:47,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204076207] [2020-12-22 06:15:47,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:47,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499464157] [2020-12-22 06:15:47,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:47,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:47,043 INFO L87 Difference]: Start difference. First operand 15564 states and 28524 transitions. Second operand 3 states. [2020-12-22 06:15:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:49,105 INFO L93 Difference]: Finished difference Result 42839 states and 78432 transitions. [2020-12-22 06:15:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:49,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 06:15:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:49,145 INFO L225 Difference]: With dead ends: 42839 [2020-12-22 06:15:49,146 INFO L226 Difference]: Without dead ends: 29987 [2020-12-22 06:15:49,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29987 states. [2020-12-22 06:15:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29987 to 29972. [2020-12-22 06:15:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29972 states. [2020-12-22 06:15:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29972 states to 29972 states and 54940 transitions. [2020-12-22 06:15:50,746 INFO L78 Accepts]: Start accepts. Automaton has 29972 states and 54940 transitions. Word has length 72 [2020-12-22 06:15:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:50,747 INFO L481 AbstractCegarLoop]: Abstraction has 29972 states and 54940 transitions. [2020-12-22 06:15:50,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 29972 states and 54940 transitions. [2020-12-22 06:15:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:15:50,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:50,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:50,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:15:50,751 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -160826903, now seen corresponding path program 1 times [2020-12-22 06:15:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:50,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102058523] [2020-12-22 06:15:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:50,816 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 06:15:50,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102058523] [2020-12-22 06:15:50,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:50,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:50,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15307199] [2020-12-22 06:15:50,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:50,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:50,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:50,818 INFO L87 Difference]: Start difference. First operand 29972 states and 54940 transitions. Second operand 3 states. [2020-12-22 06:15:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:54,202 INFO L93 Difference]: Finished difference Result 83623 states and 153025 transitions. [2020-12-22 06:15:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:54,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 06:15:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:54,293 INFO L225 Difference]: With dead ends: 83623 [2020-12-22 06:15:54,294 INFO L226 Difference]: Without dead ends: 58371 [2020-12-22 06:15:54,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58371 states. [2020-12-22 06:15:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58371 to 58356. [2020-12-22 06:15:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58356 states. [2020-12-22 06:15:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58356 states to 58356 states and 106876 transitions. [2020-12-22 06:15:57,880 INFO L78 Accepts]: Start accepts. Automaton has 58356 states and 106876 transitions. Word has length 73 [2020-12-22 06:15:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:57,881 INFO L481 AbstractCegarLoop]: Abstraction has 58356 states and 106876 transitions. [2020-12-22 06:15:57,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 58356 states and 106876 transitions. [2020-12-22 06:15:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 06:15:57,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:57,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:15:57,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:15:57,883 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:15:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:57,884 INFO L82 PathProgramCache]: Analyzing trace with hash 302753578, now seen corresponding path program 1 times [2020-12-22 06:15:57,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:57,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186002002] [2020-12-22 06:15:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:57,991 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 06:15:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186002002] [2020-12-22 06:15:57,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:57,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:57,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930032767] [2020-12-22 06:15:57,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:57,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:57,998 INFO L87 Difference]: Start difference. First operand 58356 states and 106876 transitions. Second operand 3 states. [2020-12-22 06:16:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:16:04,727 INFO L93 Difference]: Finished difference Result 164327 states and 300346 transitions. [2020-12-22 06:16:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:16:04,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 06:16:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:16:04,937 INFO L225 Difference]: With dead ends: 164327 [2020-12-22 06:16:04,937 INFO L226 Difference]: Without dead ends: 114255 [2020-12-22 06:16:05,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:16:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114255 states. [2020-12-22 06:16:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114255 to 114240. [2020-12-22 06:16:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114240 states. [2020-12-22 06:16:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114240 states to 114240 states and 208912 transitions. [2020-12-22 06:16:12,493 INFO L78 Accepts]: Start accepts. Automaton has 114240 states and 208912 transitions. Word has length 74 [2020-12-22 06:16:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:16:12,493 INFO L481 AbstractCegarLoop]: Abstraction has 114240 states and 208912 transitions. [2020-12-22 06:16:12,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:16:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 114240 states and 208912 transitions. [2020-12-22 06:16:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 06:16:12,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:16:12,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:16:12,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:16:12,497 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:16:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:16:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1502684756, now seen corresponding path program 1 times [2020-12-22 06:16:12,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:16:12,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901556010] [2020-12-22 06:16:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:16:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:16:12,794 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-12-22 06:16:12,832 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 06:16:12,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901556010] [2020-12-22 06:16:12,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:16:12,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:16:12,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868738501] [2020-12-22 06:16:12,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:16:12,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:16:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:16:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:16:12,834 INFO L87 Difference]: Start difference. First operand 114240 states and 208912 transitions. Second operand 6 states. [2020-12-22 06:16:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:16:28,629 INFO L93 Difference]: Finished difference Result 361559 states and 663915 transitions. [2020-12-22 06:16:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:16:28,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-12-22 06:16:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:16:29,364 INFO L225 Difference]: With dead ends: 361559 [2020-12-22 06:16:29,364 INFO L226 Difference]: Without dead ends: 298387 [2020-12-22 06:16:29,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:16:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298387 states. [2020-12-22 06:16:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298387 to 170495. [2020-12-22 06:16:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170495 states. [2020-12-22 06:16:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170495 states to 170495 states and 310526 transitions. [2020-12-22 06:16:41,730 INFO L78 Accepts]: Start accepts. Automaton has 170495 states and 310526 transitions. Word has length 74 [2020-12-22 06:16:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:16:41,731 INFO L481 AbstractCegarLoop]: Abstraction has 170495 states and 310526 transitions. [2020-12-22 06:16:41,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:16:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 170495 states and 310526 transitions. [2020-12-22 06:16:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:16:41,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:16:41,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:16:41,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:16:41,734 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:16:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:16:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash 605462498, now seen corresponding path program 1 times [2020-12-22 06:16:41,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:16:41,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929235784] [2020-12-22 06:16:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:16:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:16:41,840 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 06:16:41,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929235784] [2020-12-22 06:16:41,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:16:41,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:16:41,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479791170] [2020-12-22 06:16:41,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:16:41,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:16:41,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:16:41,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:16:41,842 INFO L87 Difference]: Start difference. First operand 170495 states and 310526 transitions. Second operand 6 states. [2020-12-22 06:16:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:16:57,180 INFO L93 Difference]: Finished difference Result 356129 states and 649542 transitions. [2020-12-22 06:16:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:16:57,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-12-22 06:16:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:16:57,707 INFO L225 Difference]: With dead ends: 356129 [2020-12-22 06:16:57,707 INFO L226 Difference]: Without dead ends: 242761 [2020-12-22 06:16:57,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:16:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242761 states. [2020-12-22 06:17:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242761 to 171013. [2020-12-22 06:17:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171013 states. [2020-12-22 06:17:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171013 states to 171013 states and 310980 transitions. [2020-12-22 06:17:10,275 INFO L78 Accepts]: Start accepts. Automaton has 171013 states and 310980 transitions. Word has length 76 [2020-12-22 06:17:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:17:10,275 INFO L481 AbstractCegarLoop]: Abstraction has 171013 states and 310980 transitions. [2020-12-22 06:17:10,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:17:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 171013 states and 310980 transitions. [2020-12-22 06:17:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 06:17:10,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:17:10,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:17:10,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:17:10,280 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:17:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:17:10,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1466968985, now seen corresponding path program 1 times [2020-12-22 06:17:10,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:17:10,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228450642] [2020-12-22 06:17:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:17:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:17:10,380 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 06:17:10,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228450642] [2020-12-22 06:17:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:17:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:17:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762132997] [2020-12-22 06:17:10,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:17:10,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:17:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:17:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:17:10,383 INFO L87 Difference]: Start difference. First operand 171013 states and 310980 transitions. Second operand 5 states. [2020-12-22 06:17:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:17:21,491 INFO L93 Difference]: Finished difference Result 284816 states and 517748 transitions. [2020-12-22 06:17:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:17:21,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-12-22 06:17:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:17:21,831 INFO L225 Difference]: With dead ends: 284816 [2020-12-22 06:17:21,831 INFO L226 Difference]: Without dead ends: 171156 [2020-12-22 06:17:22,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:17:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171156 states. [2020-12-22 06:17:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171156 to 171013. [2020-12-22 06:17:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171013 states. [2020-12-22 06:17:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171013 states to 171013 states and 310785 transitions. [2020-12-22 06:17:33,842 INFO L78 Accepts]: Start accepts. Automaton has 171013 states and 310785 transitions. Word has length 84 [2020-12-22 06:17:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:17:33,842 INFO L481 AbstractCegarLoop]: Abstraction has 171013 states and 310785 transitions. [2020-12-22 06:17:33,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:17:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 171013 states and 310785 transitions. [2020-12-22 06:17:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 06:17:33,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:17:33,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:17:33,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:17:33,847 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:17:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:17:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1208803547, now seen corresponding path program 1 times [2020-12-22 06:17:33,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:17:33,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17125949] [2020-12-22 06:17:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:17:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:17:33,956 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 06:17:33,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17125949] [2020-12-22 06:17:33,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:17:33,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:17:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33546922] [2020-12-22 06:17:33,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:17:33,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:17:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:17:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:17:33,958 INFO L87 Difference]: Start difference. First operand 171013 states and 310785 transitions. Second operand 6 states.