/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_spec2_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:05:30,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:05:30,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:05:30,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:05:30,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:05:30,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:05:30,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:05:30,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:05:30,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:05:30,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:05:30,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:05:30,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:05:30,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:05:30,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:05:30,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:05:30,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:05:30,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:05:30,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:05:30,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:05:30,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:05:30,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:05:30,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:05:30,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:05:30,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:05:30,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:05:30,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:05:30,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:05:30,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:05:30,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:05:30,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:05:30,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:05:30,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:05:30,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:05:30,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:05:30,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:05:30,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:05:30,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:05:30,665 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:05:30,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:05:30,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:05:30,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:05:30,670 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:05:30,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:05:30,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:05:30,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:05:30,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:05:30,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:05:30,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:05:30,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:05:30,673 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:05:30,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:05:30,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:05:30,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:05:30,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:05:30,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:05:30,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:05:30,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:05:30,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:05:30,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:05:30,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:05:30,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:05:30,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:05:30,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:05:31,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:05:31,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:05:31,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:05:31,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:05:31,120 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:05:31,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2020-12-22 06:05:31,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e21710b/38b5e2b279684c66b1d51eef0e4ec1fc/FLAGa7ce521bf [2020-12-22 06:05:32,077 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:05:32,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2020-12-22 06:05:32,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e21710b/38b5e2b279684c66b1d51eef0e4ec1fc/FLAGa7ce521bf [2020-12-22 06:05:32,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e21710b/38b5e2b279684c66b1d51eef0e4ec1fc [2020-12-22 06:05:32,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:05:32,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:05:32,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:05:32,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:05:32,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:05:32,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:05:32" (1/1) ... [2020-12-22 06:05:32,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b12e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:32, skipping insertion in model container [2020-12-22 06:05:32,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:05:32" (1/1) ... [2020-12-22 06:05:32,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:05:32,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:05:32,598 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_spec2_product22.cil.c[1221,1234] [2020-12-22 06:05:33,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:05:33,096 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:05:33,132 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_spec2_product22.cil.c[1221,1234] [2020-12-22 06:05:33,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:05:33,410 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:05:33,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33 WrapperNode [2020-12-22 06:05:33,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:05:33,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:05:33,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:05:33,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:05:33,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:33,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:33,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:05:33,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:05:33,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:05:33,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:05:33,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:33,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:34,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:34,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:34,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:34,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:34,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (1/1) ... [2020-12-22 06:05:34,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:05:34,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:05:34,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:05:34,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:05:34,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (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 06:05:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:05:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:05:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:05:34,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:05:48,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:05:48,619 INFO L299 CfgBuilder]: Removed 1469 assume(true) statements. [2020-12-22 06:05:48,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:05:48 BoogieIcfgContainer [2020-12-22 06:05:48,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:05:48,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:05:48,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:05:48,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:05:48,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:05:32" (1/3) ... [2020-12-22 06:05:48,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3fed7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:05:48, skipping insertion in model container [2020-12-22 06:05:48,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:05:33" (2/3) ... [2020-12-22 06:05:48,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3fed7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:05:48, skipping insertion in model container [2020-12-22 06:05:48,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:05:48" (3/3) ... [2020-12-22 06:05:48,639 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2020-12-22 06:05:48,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:05:48,656 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:05:48,676 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:05:48,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:05:48,736 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:05:48,736 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:05:48,736 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:05:48,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:05:48,736 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:05:48,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:05:48,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:05:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6752 states. [2020-12-22 06:05:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 06:05:48,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:48,857 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] [2020-12-22 06:05:48,858 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 06:05:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2073803296, now seen corresponding path program 1 times [2020-12-22 06:05:48,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:48,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979605409] [2020-12-22 06:05:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:49,282 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 06:05:49,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979605409] [2020-12-22 06:05:49,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:49,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:05:49,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114485154] [2020-12-22 06:05:49,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:49,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:49,307 INFO L87 Difference]: Start difference. First operand 6752 states. Second operand 3 states. [2020-12-22 06:05:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:49,758 INFO L93 Difference]: Finished difference Result 13495 states and 25593 transitions. [2020-12-22 06:05:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:49,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 06:05:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:49,842 INFO L225 Difference]: With dead ends: 13495 [2020-12-22 06:05:49,842 INFO L226 Difference]: Without dead ends: 6748 [2020-12-22 06:05:49,866 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 06:05:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2020-12-22 06:05:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6748. [2020-12-22 06:05:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6748 states. [2020-12-22 06:05:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 12787 transitions. [2020-12-22 06:05:50,182 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 12787 transitions. Word has length 27 [2020-12-22 06:05:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:50,183 INFO L481 AbstractCegarLoop]: Abstraction has 6748 states and 12787 transitions. [2020-12-22 06:05:50,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 12787 transitions. [2020-12-22 06:05:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:05:50,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:50,194 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] [2020-12-22 06:05:50,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:05:50,195 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 06:05:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash -675317179, now seen corresponding path program 1 times [2020-12-22 06:05:50,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:50,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896560754] [2020-12-22 06:05:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:50,360 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 06:05:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896560754] [2020-12-22 06:05:50,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:50,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:05:50,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926778544] [2020-12-22 06:05:50,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:05:50,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:50,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:05:50,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:05:50,364 INFO L87 Difference]: Start difference. First operand 6748 states and 12787 transitions. Second operand 6 states. [2020-12-22 06:05:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:50,916 INFO L93 Difference]: Finished difference Result 13447 states and 25490 transitions. [2020-12-22 06:05:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:05:50,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-22 06:05:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:50,957 INFO L225 Difference]: With dead ends: 13447 [2020-12-22 06:05:50,958 INFO L226 Difference]: Without dead ends: 6742 [2020-12-22 06:05:50,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:05:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2020-12-22 06:05:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 6742. [2020-12-22 06:05:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6742 states. [2020-12-22 06:05:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 12774 transitions. [2020-12-22 06:05:51,253 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 12774 transitions. Word has length 34 [2020-12-22 06:05:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:51,254 INFO L481 AbstractCegarLoop]: Abstraction has 6742 states and 12774 transitions. [2020-12-22 06:05:51,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:05:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 12774 transitions. [2020-12-22 06:05:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 06:05:51,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:51,256 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] [2020-12-22 06:05:51,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:05:51,260 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 06:05:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:51,263 INFO L82 PathProgramCache]: Analyzing trace with hash 365505635, now seen corresponding path program 1 times [2020-12-22 06:05:51,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:51,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446784742] [2020-12-22 06:05:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:51,449 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 06:05:51,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446784742] [2020-12-22 06:05:51,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:51,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:51,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154944138] [2020-12-22 06:05:51,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:51,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:51,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:51,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:51,452 INFO L87 Difference]: Start difference. First operand 6742 states and 12774 transitions. Second operand 4 states. [2020-12-22 06:05:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:51,901 INFO L93 Difference]: Finished difference Result 13441 states and 25477 transitions. [2020-12-22 06:05:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:51,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-22 06:05:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:51,941 INFO L225 Difference]: With dead ends: 13441 [2020-12-22 06:05:51,941 INFO L226 Difference]: Without dead ends: 6742 [2020-12-22 06:05:51,954 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 06:05:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2020-12-22 06:05:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 6742. [2020-12-22 06:05:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6742 states. [2020-12-22 06:05:52,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 12770 transitions. [2020-12-22 06:05:52,252 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 12770 transitions. Word has length 35 [2020-12-22 06:05:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:52,259 INFO L481 AbstractCegarLoop]: Abstraction has 6742 states and 12770 transitions. [2020-12-22 06:05:52,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 12770 transitions. [2020-12-22 06:05:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:05:52,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:52,264 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] [2020-12-22 06:05:52,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:05:52,264 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 06:05:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash -252114008, now seen corresponding path program 1 times [2020-12-22 06:05:52,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:52,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631036338] [2020-12-22 06:05:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:52,388 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 06:05:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631036338] [2020-12-22 06:05:52,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:52,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:52,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761020104] [2020-12-22 06:05:52,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:52,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:52,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:52,392 INFO L87 Difference]: Start difference. First operand 6742 states and 12770 transitions. Second operand 4 states. [2020-12-22 06:05:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:53,044 INFO L93 Difference]: Finished difference Result 13441 states and 25473 transitions. [2020-12-22 06:05:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:53,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:05:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:53,095 INFO L225 Difference]: With dead ends: 13441 [2020-12-22 06:05:53,096 INFO L226 Difference]: Without dead ends: 6742 [2020-12-22 06:05:53,108 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 06:05:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2020-12-22 06:05:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 6742. [2020-12-22 06:05:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6742 states. [2020-12-22 06:05:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 12766 transitions. [2020-12-22 06:05:53,378 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 12766 transitions. Word has length 36 [2020-12-22 06:05:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:53,379 INFO L481 AbstractCegarLoop]: Abstraction has 6742 states and 12766 transitions. [2020-12-22 06:05:53,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 12766 transitions. [2020-12-22 06:05:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:05:53,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:53,381 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] [2020-12-22 06:05:53,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:05:53,384 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 06:05:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2145845816, now seen corresponding path program 1 times [2020-12-22 06:05:53,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:53,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550463474] [2020-12-22 06:05:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:53,483 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 06:05:53,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550463474] [2020-12-22 06:05:53,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:53,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:53,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444806800] [2020-12-22 06:05:53,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:53,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:53,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:53,488 INFO L87 Difference]: Start difference. First operand 6742 states and 12766 transitions. Second operand 4 states. [2020-12-22 06:05:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:53,890 INFO L93 Difference]: Finished difference Result 13441 states and 25469 transitions. [2020-12-22 06:05:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:53,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:05:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:53,916 INFO L225 Difference]: With dead ends: 13441 [2020-12-22 06:05:53,916 INFO L226 Difference]: Without dead ends: 6742 [2020-12-22 06:05:53,929 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 06:05:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2020-12-22 06:05:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 6742. [2020-12-22 06:05:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6742 states. [2020-12-22 06:05:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 12762 transitions. [2020-12-22 06:05:54,229 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 12762 transitions. Word has length 37 [2020-12-22 06:05:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:54,229 INFO L481 AbstractCegarLoop]: Abstraction has 6742 states and 12762 transitions. [2020-12-22 06:05:54,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 12762 transitions. [2020-12-22 06:05:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:05:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:54,233 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] [2020-12-22 06:05:54,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:05:54,233 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 06:05:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash -942482872, now seen corresponding path program 1 times [2020-12-22 06:05:54,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:54,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906745611] [2020-12-22 06:05:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:54,327 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 06:05:54,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906745611] [2020-12-22 06:05:54,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:54,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:54,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871658914] [2020-12-22 06:05:54,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:54,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:54,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:54,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:54,329 INFO L87 Difference]: Start difference. First operand 6742 states and 12762 transitions. Second operand 4 states. [2020-12-22 06:05:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:54,656 INFO L93 Difference]: Finished difference Result 13441 states and 25465 transitions. [2020-12-22 06:05:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:54,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:05:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:54,680 INFO L225 Difference]: With dead ends: 13441 [2020-12-22 06:05:54,680 INFO L226 Difference]: Without dead ends: 6721 [2020-12-22 06:05:54,693 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 06:05:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2020-12-22 06:05:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2020-12-22 06:05:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6721 states. [2020-12-22 06:05:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12728 transitions. [2020-12-22 06:05:54,993 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12728 transitions. Word has length 37 [2020-12-22 06:05:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:54,993 INFO L481 AbstractCegarLoop]: Abstraction has 6721 states and 12728 transitions. [2020-12-22 06:05:54,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12728 transitions. [2020-12-22 06:05:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:05:54,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:54,995 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] [2020-12-22 06:05:54,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:05:54,996 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 06:05:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:55,002 INFO L82 PathProgramCache]: Analyzing trace with hash -649381779, now seen corresponding path program 1 times [2020-12-22 06:05:55,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:55,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777183227] [2020-12-22 06:05:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:55,118 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 06:05:55,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777183227] [2020-12-22 06:05:55,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:55,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:55,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616157937] [2020-12-22 06:05:55,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:55,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:55,122 INFO L87 Difference]: Start difference. First operand 6721 states and 12728 transitions. Second operand 4 states. [2020-12-22 06:05:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:55,652 INFO L93 Difference]: Finished difference Result 13420 states and 25431 transitions. [2020-12-22 06:05:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:55,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 06:05:55,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:55,676 INFO L225 Difference]: With dead ends: 13420 [2020-12-22 06:05:55,677 INFO L226 Difference]: Without dead ends: 6721 [2020-12-22 06:05:55,689 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 06:05:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2020-12-22 06:05:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2020-12-22 06:05:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6721 states. [2020-12-22 06:05:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12727 transitions. [2020-12-22 06:05:55,988 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12727 transitions. Word has length 38 [2020-12-22 06:05:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:55,989 INFO L481 AbstractCegarLoop]: Abstraction has 6721 states and 12727 transitions. [2020-12-22 06:05:55,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12727 transitions. [2020-12-22 06:05:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 06:05:55,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:55,992 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] [2020-12-22 06:05:55,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:05:55,992 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 06:05:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1431028947, now seen corresponding path program 1 times [2020-12-22 06:05:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:55,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344326686] [2020-12-22 06:05:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:56,104 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 06:05:56,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344326686] [2020-12-22 06:05:56,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:56,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:56,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560412064] [2020-12-22 06:05:56,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:05:56,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:05:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:05:56,108 INFO L87 Difference]: Start difference. First operand 6721 states and 12727 transitions. Second operand 4 states. [2020-12-22 06:05:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:56,453 INFO L93 Difference]: Finished difference Result 13420 states and 25430 transitions. [2020-12-22 06:05:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:05:56,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-22 06:05:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:56,476 INFO L225 Difference]: With dead ends: 13420 [2020-12-22 06:05:56,477 INFO L226 Difference]: Without dead ends: 6721 [2020-12-22 06:05:56,491 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 06:05:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2020-12-22 06:05:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2020-12-22 06:05:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6721 states. [2020-12-22 06:05:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12726 transitions. [2020-12-22 06:05:56,767 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12726 transitions. Word has length 39 [2020-12-22 06:05:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:56,767 INFO L481 AbstractCegarLoop]: Abstraction has 6721 states and 12726 transitions. [2020-12-22 06:05:56,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:05:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12726 transitions. [2020-12-22 06:05:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:05:56,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:56,769 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] [2020-12-22 06:05:56,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:05:56,769 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 06:05:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 180320562, now seen corresponding path program 1 times [2020-12-22 06:05:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:56,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25329076] [2020-12-22 06:05:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:56,847 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 06:05:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25329076] [2020-12-22 06:05:56,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:56,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:05:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464228282] [2020-12-22 06:05:56,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:05:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:05:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:05:56,850 INFO L87 Difference]: Start difference. First operand 6721 states and 12726 transitions. Second operand 7 states. [2020-12-22 06:05:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:57,320 INFO L93 Difference]: Finished difference Result 13414 states and 25418 transitions. [2020-12-22 06:05:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:05:57,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-22 06:05:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:57,345 INFO L225 Difference]: With dead ends: 13414 [2020-12-22 06:05:57,346 INFO L226 Difference]: Without dead ends: 6721 [2020-12-22 06:05:57,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:05:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2020-12-22 06:05:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2020-12-22 06:05:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6721 states. [2020-12-22 06:05:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12725 transitions. [2020-12-22 06:05:57,837 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12725 transitions. Word has length 40 [2020-12-22 06:05:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:57,837 INFO L481 AbstractCegarLoop]: Abstraction has 6721 states and 12725 transitions. [2020-12-22 06:05:57,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:05:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12725 transitions. [2020-12-22 06:05:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 06:05:57,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:57,839 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] [2020-12-22 06:05:57,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:05:57,840 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 06:05:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1433601694, now seen corresponding path program 1 times [2020-12-22 06:05:57,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:57,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84302550] [2020-12-22 06:05:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:57,951 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 06:05:57,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84302550] [2020-12-22 06:05:57,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:57,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:05:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8073187] [2020-12-22 06:05:57,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:05:57,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:57,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:05:57,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:05:57,954 INFO L87 Difference]: Start difference. First operand 6721 states and 12725 transitions. Second operand 3 states. [2020-12-22 06:05:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:05:58,945 INFO L93 Difference]: Finished difference Result 15133 states and 28671 transitions. [2020-12-22 06:05:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:05:58,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 06:05:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:05:58,978 INFO L225 Difference]: With dead ends: 15133 [2020-12-22 06:05:58,978 INFO L226 Difference]: Without dead ends: 11732 [2020-12-22 06:05:58,985 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 06:05:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11732 states. [2020-12-22 06:05:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11732 to 9633. [2020-12-22 06:05:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9633 states. [2020-12-22 06:05:59,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9633 states to 9633 states and 18241 transitions. [2020-12-22 06:05:59,453 INFO L78 Accepts]: Start accepts. Automaton has 9633 states and 18241 transitions. Word has length 41 [2020-12-22 06:05:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:05:59,453 INFO L481 AbstractCegarLoop]: Abstraction has 9633 states and 18241 transitions. [2020-12-22 06:05:59,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:05:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9633 states and 18241 transitions. [2020-12-22 06:05:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:05:59,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:05:59,462 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 06:05:59,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:05:59,462 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 06:05:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:05:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash -794605999, now seen corresponding path program 1 times [2020-12-22 06:05:59,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:05:59,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616842156] [2020-12-22 06:05:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:05:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:05:59,548 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 06:05:59,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616842156] [2020-12-22 06:05:59,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:05:59,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:05:59,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996778391] [2020-12-22 06:05:59,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:05:59,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:05:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:05:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:05:59,551 INFO L87 Difference]: Start difference. First operand 9633 states and 18241 transitions. Second operand 5 states. [2020-12-22 06:06:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:00,622 INFO L93 Difference]: Finished difference Result 19691 states and 37120 transitions. [2020-12-22 06:06:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:06:00,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-12-22 06:06:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:00,661 INFO L225 Difference]: With dead ends: 19691 [2020-12-22 06:06:00,661 INFO L226 Difference]: Without dead ends: 11235 [2020-12-22 06:06:00,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:06:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11235 states. [2020-12-22 06:06:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11235 to 7923. [2020-12-22 06:06:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7923 states. [2020-12-22 06:06:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7923 states to 7923 states and 14941 transitions. [2020-12-22 06:06:01,293 INFO L78 Accepts]: Start accepts. Automaton has 7923 states and 14941 transitions. Word has length 59 [2020-12-22 06:06:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:01,293 INFO L481 AbstractCegarLoop]: Abstraction has 7923 states and 14941 transitions. [2020-12-22 06:06:01,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7923 states and 14941 transitions. [2020-12-22 06:06:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:06:01,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:01,298 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] [2020-12-22 06:06:01,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:06:01,299 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 06:06:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 556602042, now seen corresponding path program 1 times [2020-12-22 06:06:01,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:01,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383296007] [2020-12-22 06:06:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:01,398 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 06:06:01,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383296007] [2020-12-22 06:06:01,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:01,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:06:01,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771146752] [2020-12-22 06:06:01,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:01,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:01,401 INFO L87 Difference]: Start difference. First operand 7923 states and 14941 transitions. Second operand 3 states. [2020-12-22 06:06:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:02,300 INFO L93 Difference]: Finished difference Result 18631 states and 35164 transitions. [2020-12-22 06:06:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:02,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 06:06:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:02,335 INFO L225 Difference]: With dead ends: 18631 [2020-12-22 06:06:02,335 INFO L226 Difference]: Without dead ends: 11937 [2020-12-22 06:06:02,348 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 06:06:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11937 states. [2020-12-22 06:06:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11937 to 11922. [2020-12-22 06:06:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11922 states. [2020-12-22 06:06:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11922 states to 11922 states and 22443 transitions. [2020-12-22 06:06:02,914 INFO L78 Accepts]: Start accepts. Automaton has 11922 states and 22443 transitions. Word has length 60 [2020-12-22 06:06:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:02,915 INFO L481 AbstractCegarLoop]: Abstraction has 11922 states and 22443 transitions. [2020-12-22 06:06:02,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11922 states and 22443 transitions. [2020-12-22 06:06:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:06:02,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:02,919 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 06:06:02,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:06:02,920 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 06:06:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:02,920 INFO L82 PathProgramCache]: Analyzing trace with hash -230214341, now seen corresponding path program 1 times [2020-12-22 06:06:02,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:02,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118516100] [2020-12-22 06:06:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:03,014 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 06:06:03,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118516100] [2020-12-22 06:06:03,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:03,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:06:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300773600] [2020-12-22 06:06:03,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:03,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:03,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:03,017 INFO L87 Difference]: Start difference. First operand 11922 states and 22443 transitions. Second operand 3 states. [2020-12-22 06:06:03,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:03,986 INFO L93 Difference]: Finished difference Result 29920 states and 56364 transitions. [2020-12-22 06:06:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:03,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:06:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:04,052 INFO L225 Difference]: With dead ends: 29920 [2020-12-22 06:06:04,053 INFO L226 Difference]: Without dead ends: 19842 [2020-12-22 06:06:04,080 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 06:06:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19842 states. [2020-12-22 06:06:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19842 to 19827. [2020-12-22 06:06:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19827 states. [2020-12-22 06:06:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19827 states to 19827 states and 37288 transitions. [2020-12-22 06:06:05,108 INFO L78 Accepts]: Start accepts. Automaton has 19827 states and 37288 transitions. Word has length 61 [2020-12-22 06:06:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:05,109 INFO L481 AbstractCegarLoop]: Abstraction has 19827 states and 37288 transitions. [2020-12-22 06:06:05,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 19827 states and 37288 transitions. [2020-12-22 06:06:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:06:05,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:05,113 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 06:06:05,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:06:05,114 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 06:06:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1217830625, now seen corresponding path program 1 times [2020-12-22 06:06:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:05,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553739864] [2020-12-22 06:06:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:05,203 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 06:06:05,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553739864] [2020-12-22 06:06:05,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:05,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:06:05,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368853193] [2020-12-22 06:06:05,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:05,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:05,205 INFO L87 Difference]: Start difference. First operand 19827 states and 37288 transitions. Second operand 3 states. [2020-12-22 06:06:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:06,531 INFO L93 Difference]: Finished difference Result 52312 states and 98421 transitions. [2020-12-22 06:06:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:06,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:06:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:06,642 INFO L225 Difference]: With dead ends: 52312 [2020-12-22 06:06:06,643 INFO L226 Difference]: Without dead ends: 35446 [2020-12-22 06:06:06,670 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 06:06:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35446 states. [2020-12-22 06:06:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35446 to 35431. [2020-12-22 06:06:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35431 states. [2020-12-22 06:06:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35431 states to 35431 states and 66578 transitions. [2020-12-22 06:06:08,301 INFO L78 Accepts]: Start accepts. Automaton has 35431 states and 66578 transitions. Word has length 62 [2020-12-22 06:06:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:08,302 INFO L481 AbstractCegarLoop]: Abstraction has 35431 states and 66578 transitions. [2020-12-22 06:06:08,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 35431 states and 66578 transitions. [2020-12-22 06:06:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:06:08,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:08,309 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 06:06:08,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:06:08,310 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 06:06:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash 159690752, now seen corresponding path program 1 times [2020-12-22 06:06:08,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:08,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369607962] [2020-12-22 06:06:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:08,388 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 06:06:08,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369607962] [2020-12-22 06:06:08,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:08,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:06:08,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433425087] [2020-12-22 06:06:08,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:08,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:08,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:08,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:08,391 INFO L87 Difference]: Start difference. First operand 35431 states and 66578 transitions. Second operand 3 states. [2020-12-22 06:06:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:10,969 INFO L93 Difference]: Finished difference Result 96684 states and 181686 transitions. [2020-12-22 06:06:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:10,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:06:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:11,287 INFO L225 Difference]: With dead ends: 96684 [2020-12-22 06:06:11,288 INFO L226 Difference]: Without dead ends: 66222 [2020-12-22 06:06:11,358 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 06:06:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66222 states. [2020-12-22 06:06:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66222 to 66207. [2020-12-22 06:06:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66207 states. [2020-12-22 06:06:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66207 states to 66207 states and 124276 transitions. [2020-12-22 06:06:14,485 INFO L78 Accepts]: Start accepts. Automaton has 66207 states and 124276 transitions. Word has length 63 [2020-12-22 06:06:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:14,485 INFO L481 AbstractCegarLoop]: Abstraction has 66207 states and 124276 transitions. [2020-12-22 06:06:14,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 66207 states and 124276 transitions. [2020-12-22 06:06:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:06:14,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:14,492 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 06:06:14,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:06:14,493 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 06:06:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1842035588, now seen corresponding path program 1 times [2020-12-22 06:06:14,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:14,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698570114] [2020-12-22 06:06:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:14,561 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 06:06:14,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698570114] [2020-12-22 06:06:14,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:14,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:06:14,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919310704] [2020-12-22 06:06:14,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:06:14,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:06:14,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:06:14,564 INFO L87 Difference]: Start difference. First operand 66207 states and 124276 transitions. Second operand 3 states. [2020-12-22 06:06:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:18,282 INFO L93 Difference]: Finished difference Result 184564 states and 346355 transitions. [2020-12-22 06:06:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:06:18,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 06:06:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:18,706 INFO L225 Difference]: With dead ends: 184564 [2020-12-22 06:06:18,706 INFO L226 Difference]: Without dead ends: 126890 [2020-12-22 06:06:18,781 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 06:06:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126890 states. [2020-12-22 06:06:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126890 to 126875. [2020-12-22 06:06:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126875 states. [2020-12-22 06:06:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126875 states to 126875 states and 237826 transitions. [2020-12-22 06:06:23,897 INFO L78 Accepts]: Start accepts. Automaton has 126875 states and 237826 transitions. Word has length 64 [2020-12-22 06:06:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:23,897 INFO L481 AbstractCegarLoop]: Abstraction has 126875 states and 237826 transitions. [2020-12-22 06:06:23,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:06:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 126875 states and 237826 transitions. [2020-12-22 06:06:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:06:23,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:23,901 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 06:06:23,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:06:23,902 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 06:06:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:23,902 INFO L82 PathProgramCache]: Analyzing trace with hash 36597254, now seen corresponding path program 1 times [2020-12-22 06:06:23,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:23,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20339825] [2020-12-22 06:06:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:23,986 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 06:06:23,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20339825] [2020-12-22 06:06:23,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:23,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:06:23,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461208676] [2020-12-22 06:06:23,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:23,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:23,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:23,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:23,990 INFO L87 Difference]: Start difference. First operand 126875 states and 237826 transitions. Second operand 5 states. [2020-12-22 06:06:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:35,765 INFO L93 Difference]: Finished difference Result 579741 states and 1088023 transitions. [2020-12-22 06:06:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:06:35,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 06:06:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:06:37,434 INFO L225 Difference]: With dead ends: 579741 [2020-12-22 06:06:37,434 INFO L226 Difference]: Without dead ends: 467815 [2020-12-22 06:06:37,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:06:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467815 states. [2020-12-22 06:06:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467815 to 225142. [2020-12-22 06:06:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225142 states. [2020-12-22 06:06:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225142 states to 225142 states and 421368 transitions. [2020-12-22 06:06:48,271 INFO L78 Accepts]: Start accepts. Automaton has 225142 states and 421368 transitions. Word has length 64 [2020-12-22 06:06:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:06:48,271 INFO L481 AbstractCegarLoop]: Abstraction has 225142 states and 421368 transitions. [2020-12-22 06:06:48,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:06:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 225142 states and 421368 transitions. [2020-12-22 06:06:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:06:48,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:06:48,274 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 06:06:48,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:06:48,275 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 06:06:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:06:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1430025128, now seen corresponding path program 1 times [2020-12-22 06:06:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:06:48,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377322006] [2020-12-22 06:06:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:06:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:06:48,356 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 06:06:48,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377322006] [2020-12-22 06:06:48,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:06:48,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:06:48,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913972885] [2020-12-22 06:06:48,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:06:48,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:06:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:06:48,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:06:48,358 INFO L87 Difference]: Start difference. First operand 225142 states and 421368 transitions. Second operand 5 states. [2020-12-22 06:06:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:06:59,678 INFO L93 Difference]: Finished difference Result 561612 states and 1050166 transitions. [2020-12-22 06:06:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:06:59,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 06:06:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:00,542 INFO L225 Difference]: With dead ends: 561612 [2020-12-22 06:07:00,542 INFO L226 Difference]: Without dead ends: 351824 [2020-12-22 06:07:00,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:07:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351824 states. [2020-12-22 06:07:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351824 to 225807. [2020-12-22 06:07:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225807 states. [2020-12-22 06:07:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225807 states to 225807 states and 422033 transitions. [2020-12-22 06:07:10,723 INFO L78 Accepts]: Start accepts. Automaton has 225807 states and 422033 transitions. Word has length 66 [2020-12-22 06:07:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:10,723 INFO L481 AbstractCegarLoop]: Abstraction has 225807 states and 422033 transitions. [2020-12-22 06:07:10,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:07:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 225807 states and 422033 transitions. [2020-12-22 06:07:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:07:10,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:10,736 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 06:07:10,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:07:10,736 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 06:07:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1179304055, now seen corresponding path program 1 times [2020-12-22 06:07:10,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:10,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065923463] [2020-12-22 06:07:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:10,822 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 06:07:10,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065923463] [2020-12-22 06:07:10,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:10,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:07:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515620325] [2020-12-22 06:07:10,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:10,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:10,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:10,826 INFO L87 Difference]: Start difference. First operand 225807 states and 422033 transitions. Second operand 3 states. [2020-12-22 06:07:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:22,365 INFO L93 Difference]: Finished difference Result 490650 states and 915440 transitions. [2020-12-22 06:07:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:22,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:07:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:23,421 INFO L225 Difference]: With dead ends: 490650 [2020-12-22 06:07:23,422 INFO L226 Difference]: Without dead ends: 279615 [2020-12-22 06:07:23,845 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 06:07:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279615 states. [2020-12-22 06:07:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279615 to 278808. [2020-12-22 06:07:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278808 states. [2020-12-22 06:07:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278808 states to 278808 states and 515843 transitions. [2020-12-22 06:07:36,110 INFO L78 Accepts]: Start accepts. Automaton has 278808 states and 515843 transitions. Word has length 71 [2020-12-22 06:07:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:36,110 INFO L481 AbstractCegarLoop]: Abstraction has 278808 states and 515843 transitions. [2020-12-22 06:07:36,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 278808 states and 515843 transitions. [2020-12-22 06:07:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:07:36,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:36,116 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 06:07:36,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:07:36,116 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 06:07:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:36,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1648847870, now seen corresponding path program 1 times [2020-12-22 06:07:36,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:36,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443058638] [2020-12-22 06:07:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:36,211 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 06:07:36,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443058638] [2020-12-22 06:07:36,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:36,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:07:36,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666509001] [2020-12-22 06:07:36,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:07:36,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:07:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:07:36,214 INFO L87 Difference]: Start difference. First operand 278808 states and 515843 transitions. Second operand 5 states. [2020-12-22 06:07:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:55,123 INFO L93 Difference]: Finished difference Result 761224 states and 1406122 transitions. [2020-12-22 06:07:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:07:55,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-12-22 06:07:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:56,761 INFO L225 Difference]: With dead ends: 761224 [2020-12-22 06:07:56,761 INFO L226 Difference]: Without dead ends: 497212 [2020-12-22 06:07:57,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 06:07:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497212 states. [2020-12-22 06:08:09,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497212 to 278808. [2020-12-22 06:08:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278808 states. [2020-12-22 06:08:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278808 states to 278808 states and 508521 transitions. [2020-12-22 06:08:10,801 INFO L78 Accepts]: Start accepts. Automaton has 278808 states and 508521 transitions. Word has length 73 [2020-12-22 06:08:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:10,801 INFO L481 AbstractCegarLoop]: Abstraction has 278808 states and 508521 transitions. [2020-12-22 06:08:10,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:08:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 278808 states and 508521 transitions. [2020-12-22 06:08:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 06:08:10,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:10,806 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 06:08:10,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:08:10,806 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 06:08:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:10,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1230880605, now seen corresponding path program 1 times [2020-12-22 06:08:10,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:10,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121838262] [2020-12-22 06:08:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:10,915 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 06:08:10,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121838262] [2020-12-22 06:08:10,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:10,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:08:10,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180657637] [2020-12-22 06:08:10,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:10,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:10,918 INFO L87 Difference]: Start difference. First operand 278808 states and 508521 transitions. Second operand 3 states. [2020-12-22 06:08:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:31,751 INFO L93 Difference]: Finished difference Result 814900 states and 1485941 transitions. [2020-12-22 06:08:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:31,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 06:08:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:33,547 INFO L225 Difference]: With dead ends: 814900 [2020-12-22 06:08:33,547 INFO L226 Difference]: Without dead ends: 550597 [2020-12-22 06:08:33,860 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 06:08:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550597 states.