/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/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:44:45,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:44:45,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:44:45,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:44:45,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:44:45,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:44:45,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:44:45,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:44:45,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:44:45,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:44:45,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:44:45,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:44:45,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:44:45,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:44:45,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:44:45,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:44:45,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:44:45,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:44:45,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:44:45,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:44:45,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:44:45,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:44:45,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:44:45,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:44:45,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:44:45,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:44:45,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:44:45,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:44:45,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:44:45,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:44:45,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:44:45,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:44:45,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:44:45,687 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:44:45,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:44:45,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:44:45,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:44:45,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:44:45,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:44:45,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:44:45,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:44:45,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:44:45,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:44:45,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:44:45,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:44:45,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:44:45,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:44:45,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:44:45,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:44:45,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:44:45,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:44:45,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:44:45,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:44:45,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:44:45,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:44:46,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:44:46,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:44:46,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:44:46,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:44:46,139 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:44:46,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:44:46,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b5e48bd4/a12221c9a198471faaaa1e2bf7a75d60/FLAG44dd6a155 [2020-12-22 07:44:46,944 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:44:46,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:44:46,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b5e48bd4/a12221c9a198471faaaa1e2bf7a75d60/FLAG44dd6a155 [2020-12-22 07:44:47,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b5e48bd4/a12221c9a198471faaaa1e2bf7a75d60 [2020-12-22 07:44:47,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:44:47,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:44:47,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:47,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:44:47,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:44:47,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:47" (1/1) ... [2020-12-22 07:44:47,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1697b6db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:47, skipping insertion in model container [2020-12-22 07:44:47,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:44:47" (1/1) ... [2020-12-22 07:44:47,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:44:47,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:44:47,925 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/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2020-12-22 07:44:47,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:47,940 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:44:48,105 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/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2020-12-22 07:44:48,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:44:48,131 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:44:48,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48 WrapperNode [2020-12-22 07:44:48,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:44:48,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:48,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:44:48,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:44:48,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:44:48,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:44:48,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:44:48,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:44:48,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (1/1) ... [2020-12-22 07:44:48,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:44:48,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:44:48,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:44:48,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:44:48,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (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 07:44:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:44:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:44:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:44:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:44:50,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:44:50,683 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:44:50,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:50 BoogieIcfgContainer [2020-12-22 07:44:50,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:44:50,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:44:50,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:44:50,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:44:50,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:44:47" (1/3) ... [2020-12-22 07:44:50,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314f4c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:50, skipping insertion in model container [2020-12-22 07:44:50,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:44:48" (2/3) ... [2020-12-22 07:44:50,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314f4c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:44:50, skipping insertion in model container [2020-12-22 07:44:50,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:44:50" (3/3) ... [2020-12-22 07:44:50,700 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2020-12-22 07:44:50,707 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:44:50,713 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:44:50,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:44:50,782 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:44:50,783 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:44:50,783 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:44:50,783 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:44:50,783 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:44:50,783 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:44:50,783 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:44:50,783 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:44:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states. [2020-12-22 07:44:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:44:50,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:50,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:50,847 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash -388227635, now seen corresponding path program 1 times [2020-12-22 07:44:50,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:50,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485634176] [2020-12-22 07:44:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:51,405 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 07:44:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485634176] [2020-12-22 07:44:51,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:51,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:44:51,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439625684] [2020-12-22 07:44:51,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:44:51,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:44:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:44:51,434 INFO L87 Difference]: Start difference. First operand 736 states. Second operand 2 states. [2020-12-22 07:44:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:51,510 INFO L93 Difference]: Finished difference Result 922 states and 1680 transitions. [2020-12-22 07:44:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:44:51,511 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:44:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:51,536 INFO L225 Difference]: With dead ends: 922 [2020-12-22 07:44:51,536 INFO L226 Difference]: Without dead ends: 732 [2020-12-22 07:44:51,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:44:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-12-22 07:44:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2020-12-22 07:44:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-12-22 07:44:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1351 transitions. [2020-12-22 07:44:51,644 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1351 transitions. Word has length 153 [2020-12-22 07:44:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:51,647 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 1351 transitions. [2020-12-22 07:44:51,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:44:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1351 transitions. [2020-12-22 07:44:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:44:51,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:51,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:51,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:44:51,670 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash -897700725, now seen corresponding path program 1 times [2020-12-22 07:44:51,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:51,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367907081] [2020-12-22 07:44:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:51,981 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 07:44:51,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367907081] [2020-12-22 07:44:51,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:51,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:44:51,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851654723] [2020-12-22 07:44:51,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:44:51,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:51,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:44:51,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:44:51,987 INFO L87 Difference]: Start difference. First operand 732 states and 1351 transitions. Second operand 5 states. [2020-12-22 07:44:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:52,183 INFO L93 Difference]: Finished difference Result 917 states and 1670 transitions. [2020-12-22 07:44:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:44:52,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:44:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:52,196 INFO L225 Difference]: With dead ends: 917 [2020-12-22 07:44:52,196 INFO L226 Difference]: Without dead ends: 732 [2020-12-22 07:44:52,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:44:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-12-22 07:44:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2020-12-22 07:44:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-12-22 07:44:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1286 transitions. [2020-12-22 07:44:52,241 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1286 transitions. Word has length 153 [2020-12-22 07:44:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:52,243 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 1286 transitions. [2020-12-22 07:44:52,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:44:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1286 transitions. [2020-12-22 07:44:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 07:44:52,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:52,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:52,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:44:52,250 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1598055145, now seen corresponding path program 1 times [2020-12-22 07:44:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:52,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490886398] [2020-12-22 07:44:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:52,698 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 07:44:52,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490886398] [2020-12-22 07:44:52,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:52,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:52,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485395514] [2020-12-22 07:44:52,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:52,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:52,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:52,708 INFO L87 Difference]: Start difference. First operand 732 states and 1286 transitions. Second operand 3 states. [2020-12-22 07:44:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:52,804 INFO L93 Difference]: Finished difference Result 1080 states and 1890 transitions. [2020-12-22 07:44:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:52,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2020-12-22 07:44:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:52,817 INFO L225 Difference]: With dead ends: 1080 [2020-12-22 07:44:52,817 INFO L226 Difference]: Without dead ends: 899 [2020-12-22 07:44:52,820 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 07:44:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-12-22 07:44:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2020-12-22 07:44:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 07:44:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1569 transitions. [2020-12-22 07:44:52,865 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1569 transitions. Word has length 217 [2020-12-22 07:44:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:52,877 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1569 transitions. [2020-12-22 07:44:52,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1569 transitions. [2020-12-22 07:44:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 07:44:52,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:52,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:52,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:44:52,886 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:52,887 INFO L82 PathProgramCache]: Analyzing trace with hash 741252945, now seen corresponding path program 1 times [2020-12-22 07:44:52,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:52,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228691645] [2020-12-22 07:44:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:53,249 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 07:44:53,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228691645] [2020-12-22 07:44:53,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:53,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:53,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405846361] [2020-12-22 07:44:53,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:53,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:53,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:53,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:53,253 INFO L87 Difference]: Start difference. First operand 897 states and 1569 transitions. Second operand 3 states. [2020-12-22 07:44:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:53,307 INFO L93 Difference]: Finished difference Result 1565 states and 2721 transitions. [2020-12-22 07:44:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:53,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 07:44:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:53,315 INFO L225 Difference]: With dead ends: 1565 [2020-12-22 07:44:53,315 INFO L226 Difference]: Without dead ends: 1219 [2020-12-22 07:44:53,316 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 07:44:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2020-12-22 07:44:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1217. [2020-12-22 07:44:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2020-12-22 07:44:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 2120 transitions. [2020-12-22 07:44:53,360 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 2120 transitions. Word has length 221 [2020-12-22 07:44:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:53,361 INFO L481 AbstractCegarLoop]: Abstraction has 1217 states and 2120 transitions. [2020-12-22 07:44:53,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 2120 transitions. [2020-12-22 07:44:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:44:53,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:53,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:53,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:44:53,367 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash -674300039, now seen corresponding path program 1 times [2020-12-22 07:44:53,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:53,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415095575] [2020-12-22 07:44:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:44:53,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415095575] [2020-12-22 07:44:53,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:53,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:53,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163486492] [2020-12-22 07:44:53,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:53,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:53,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:53,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:53,618 INFO L87 Difference]: Start difference. First operand 1217 states and 2120 transitions. Second operand 3 states. [2020-12-22 07:44:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:53,682 INFO L93 Difference]: Finished difference Result 2501 states and 4330 transitions. [2020-12-22 07:44:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:53,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 07:44:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:53,694 INFO L225 Difference]: With dead ends: 2501 [2020-12-22 07:44:53,694 INFO L226 Difference]: Without dead ends: 1835 [2020-12-22 07:44:53,696 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 07:44:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2020-12-22 07:44:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1833. [2020-12-22 07:44:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2020-12-22 07:44:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 3176 transitions. [2020-12-22 07:44:53,766 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 3176 transitions. Word has length 225 [2020-12-22 07:44:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:53,766 INFO L481 AbstractCegarLoop]: Abstraction has 1833 states and 3176 transitions. [2020-12-22 07:44:53,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 3176 transitions. [2020-12-22 07:44:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 07:44:53,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:53,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:53,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:44:53,772 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1433109345, now seen corresponding path program 1 times [2020-12-22 07:44:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:53,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457576680] [2020-12-22 07:44:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:53,965 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 07:44:53,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457576680] [2020-12-22 07:44:53,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:53,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:53,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631670019] [2020-12-22 07:44:53,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:53,968 INFO L87 Difference]: Start difference. First operand 1833 states and 3176 transitions. Second operand 3 states. [2020-12-22 07:44:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:54,039 INFO L93 Difference]: Finished difference Result 4301 states and 7410 transitions. [2020-12-22 07:44:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:54,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-12-22 07:44:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:54,056 INFO L225 Difference]: With dead ends: 4301 [2020-12-22 07:44:54,056 INFO L226 Difference]: Without dead ends: 3019 [2020-12-22 07:44:54,059 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 07:44:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-12-22 07:44:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3017. [2020-12-22 07:44:54,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2020-12-22 07:44:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 5196 transitions. [2020-12-22 07:44:54,151 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 5196 transitions. Word has length 229 [2020-12-22 07:44:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:54,152 INFO L481 AbstractCegarLoop]: Abstraction has 3017 states and 5196 transitions. [2020-12-22 07:44:54,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 5196 transitions. [2020-12-22 07:44:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:44:54,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:54,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:54,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:44:54,159 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash 792603401, now seen corresponding path program 1 times [2020-12-22 07:44:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:54,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253477244] [2020-12-22 07:44:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:54,419 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 07:44:54,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253477244] [2020-12-22 07:44:54,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:54,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:54,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675691066] [2020-12-22 07:44:54,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:54,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:54,424 INFO L87 Difference]: Start difference. First operand 3017 states and 5196 transitions. Second operand 3 states. [2020-12-22 07:44:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:54,526 INFO L93 Difference]: Finished difference Result 7757 states and 13294 transitions. [2020-12-22 07:44:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:54,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:44:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:54,566 INFO L225 Difference]: With dead ends: 7757 [2020-12-22 07:44:54,566 INFO L226 Difference]: Without dead ends: 5291 [2020-12-22 07:44:54,578 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 07:44:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2020-12-22 07:44:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 5289. [2020-12-22 07:44:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5289 states. [2020-12-22 07:44:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 9052 transitions. [2020-12-22 07:44:54,803 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 9052 transitions. Word has length 233 [2020-12-22 07:44:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:54,804 INFO L481 AbstractCegarLoop]: Abstraction has 5289 states and 9052 transitions. [2020-12-22 07:44:54,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 9052 transitions. [2020-12-22 07:44:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:44:54,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:54,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:54,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:44:54,867 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash 108066417, now seen corresponding path program 1 times [2020-12-22 07:44:54,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:54,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707084455] [2020-12-22 07:44:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:55,275 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 07:44:55,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707084455] [2020-12-22 07:44:55,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:55,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:44:55,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134613170] [2020-12-22 07:44:55,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:44:55,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:55,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:44:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:44:55,278 INFO L87 Difference]: Start difference. First operand 5289 states and 9052 transitions. Second operand 7 states. [2020-12-22 07:44:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:56,174 INFO L93 Difference]: Finished difference Result 29643 states and 50837 transitions. [2020-12-22 07:44:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:44:56,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 237 [2020-12-22 07:44:56,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:56,283 INFO L225 Difference]: With dead ends: 29643 [2020-12-22 07:44:56,283 INFO L226 Difference]: Without dead ends: 24905 [2020-12-22 07:44:56,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:44:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24905 states. [2020-12-22 07:44:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24905 to 12197. [2020-12-22 07:44:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12197 states. [2020-12-22 07:44:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12197 states to 12197 states and 20884 transitions. [2020-12-22 07:44:56,953 INFO L78 Accepts]: Start accepts. Automaton has 12197 states and 20884 transitions. Word has length 237 [2020-12-22 07:44:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:56,954 INFO L481 AbstractCegarLoop]: Abstraction has 12197 states and 20884 transitions. [2020-12-22 07:44:56,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:44:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 12197 states and 20884 transitions. [2020-12-22 07:44:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 07:44:56,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:56,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:56,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:44:56,967 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1083679653, now seen corresponding path program 1 times [2020-12-22 07:44:56,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:56,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055434629] [2020-12-22 07:44:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:57,344 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 07:44:57,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055434629] [2020-12-22 07:44:57,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:57,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:57,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232224438] [2020-12-22 07:44:57,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:57,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:57,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:57,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:57,354 INFO L87 Difference]: Start difference. First operand 12197 states and 20884 transitions. Second operand 4 states. [2020-12-22 07:44:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:57,854 INFO L93 Difference]: Finished difference Result 28676 states and 49121 transitions. [2020-12-22 07:44:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:57,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-12-22 07:44:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:57,904 INFO L225 Difference]: With dead ends: 28676 [2020-12-22 07:44:57,904 INFO L226 Difference]: Without dead ends: 17030 [2020-12-22 07:44:57,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17030 states. [2020-12-22 07:44:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17030 to 16995. [2020-12-22 07:44:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16995 states. [2020-12-22 07:44:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16995 states to 16995 states and 29082 transitions. [2020-12-22 07:44:58,806 INFO L78 Accepts]: Start accepts. Automaton has 16995 states and 29082 transitions. Word has length 238 [2020-12-22 07:44:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:58,807 INFO L481 AbstractCegarLoop]: Abstraction has 16995 states and 29082 transitions. [2020-12-22 07:44:58,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:44:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 16995 states and 29082 transitions. [2020-12-22 07:44:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:44:58,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:58,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:58,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:44:58,823 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash 786829641, now seen corresponding path program 1 times [2020-12-22 07:44:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:58,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824969073] [2020-12-22 07:44:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:59,058 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 07:44:59,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824969073] [2020-12-22 07:44:59,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:59,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:59,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938224543] [2020-12-22 07:44:59,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:59,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:59,061 INFO L87 Difference]: Start difference. First operand 16995 states and 29082 transitions. Second operand 3 states. [2020-12-22 07:44:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:59,640 INFO L93 Difference]: Finished difference Result 38906 states and 66693 transitions. [2020-12-22 07:44:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:59,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:44:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:59,709 INFO L225 Difference]: With dead ends: 38906 [2020-12-22 07:44:59,710 INFO L226 Difference]: Without dead ends: 26797 [2020-12-22 07:44:59,732 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 07:44:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26797 states. [2020-12-22 07:45:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26797 to 26795. [2020-12-22 07:45:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26795 states. [2020-12-22 07:45:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26795 states to 26795 states and 45773 transitions. [2020-12-22 07:45:00,823 INFO L78 Accepts]: Start accepts. Automaton has 26795 states and 45773 transitions. Word has length 239 [2020-12-22 07:45:00,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:00,823 INFO L481 AbstractCegarLoop]: Abstraction has 26795 states and 45773 transitions. [2020-12-22 07:45:00,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 26795 states and 45773 transitions. [2020-12-22 07:45:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:45:00,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:00,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:00,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:45:00,831 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash -259310295, now seen corresponding path program 1 times [2020-12-22 07:45:00,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:00,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770406947] [2020-12-22 07:45:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:01,114 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 07:45:01,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770406947] [2020-12-22 07:45:01,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:01,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:01,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678405607] [2020-12-22 07:45:01,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:01,118 INFO L87 Difference]: Start difference. First operand 26795 states and 45773 transitions. Second operand 3 states. [2020-12-22 07:45:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:01,988 INFO L93 Difference]: Finished difference Result 51907 states and 88688 transitions. [2020-12-22 07:45:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:01,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:45:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:02,094 INFO L225 Difference]: With dead ends: 51907 [2020-12-22 07:45:02,094 INFO L226 Difference]: Without dead ends: 37921 [2020-12-22 07:45:02,122 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 07:45:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37921 states. [2020-12-22 07:45:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37921 to 37919. [2020-12-22 07:45:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37919 states. [2020-12-22 07:45:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37919 states to 37919 states and 64605 transitions. [2020-12-22 07:45:03,335 INFO L78 Accepts]: Start accepts. Automaton has 37919 states and 64605 transitions. Word has length 239 [2020-12-22 07:45:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:03,335 INFO L481 AbstractCegarLoop]: Abstraction has 37919 states and 64605 transitions. [2020-12-22 07:45:03,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 37919 states and 64605 transitions. [2020-12-22 07:45:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:45:03,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:03,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:03,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:45:03,342 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:03,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1955219721, now seen corresponding path program 1 times [2020-12-22 07:45:03,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:03,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079636744] [2020-12-22 07:45:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:03,674 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 07:45:03,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079636744] [2020-12-22 07:45:03,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:03,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:03,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44130882] [2020-12-22 07:45:03,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:03,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:03,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:03,677 INFO L87 Difference]: Start difference. First operand 37919 states and 64605 transitions. Second operand 3 states. [2020-12-22 07:45:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:04,792 INFO L93 Difference]: Finished difference Result 73271 states and 124880 transitions. [2020-12-22 07:45:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:04,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:45:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:04,958 INFO L225 Difference]: With dead ends: 73271 [2020-12-22 07:45:04,958 INFO L226 Difference]: Without dead ends: 53445 [2020-12-22 07:45:05,005 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 07:45:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53445 states. [2020-12-22 07:45:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53445 to 53443. [2020-12-22 07:45:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53443 states. [2020-12-22 07:45:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53443 states to 53443 states and 90797 transitions. [2020-12-22 07:45:06,784 INFO L78 Accepts]: Start accepts. Automaton has 53443 states and 90797 transitions. Word has length 239 [2020-12-22 07:45:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:06,784 INFO L481 AbstractCegarLoop]: Abstraction has 53443 states and 90797 transitions. [2020-12-22 07:45:06,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 53443 states and 90797 transitions. [2020-12-22 07:45:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:45:06,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:06,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:06,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:45:06,790 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:06,791 INFO L82 PathProgramCache]: Analyzing trace with hash 583218409, now seen corresponding path program 1 times [2020-12-22 07:45:06,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:06,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451134634] [2020-12-22 07:45:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:07,197 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 07:45:07,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451134634] [2020-12-22 07:45:07,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:07,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:07,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849141731] [2020-12-22 07:45:07,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:07,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:07,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:07,207 INFO L87 Difference]: Start difference. First operand 53443 states and 90797 transitions. Second operand 3 states. [2020-12-22 07:45:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:08,485 INFO L93 Difference]: Finished difference Result 103003 states and 175072 transitions. [2020-12-22 07:45:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:08,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:45:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:08,677 INFO L225 Difference]: With dead ends: 103003 [2020-12-22 07:45:08,677 INFO L226 Difference]: Without dead ends: 74993 [2020-12-22 07:45:08,736 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 07:45:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74993 states. [2020-12-22 07:45:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74993 to 74991. [2020-12-22 07:45:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74991 states. [2020-12-22 07:45:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74991 states to 74991 states and 127009 transitions. [2020-12-22 07:45:11,028 INFO L78 Accepts]: Start accepts. Automaton has 74991 states and 127009 transitions. Word has length 239 [2020-12-22 07:45:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:11,029 INFO L481 AbstractCegarLoop]: Abstraction has 74991 states and 127009 transitions. [2020-12-22 07:45:11,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 74991 states and 127009 transitions. [2020-12-22 07:45:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:45:11,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:11,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:11,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:45:11,034 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:11,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1125515465, now seen corresponding path program 1 times [2020-12-22 07:45:11,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:11,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944426306] [2020-12-22 07:45:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:11,409 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 07:45:11,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944426306] [2020-12-22 07:45:11,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:11,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:45:11,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351363457] [2020-12-22 07:45:11,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:45:11,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:45:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:45:11,417 INFO L87 Difference]: Start difference. First operand 74991 states and 127009 transitions. Second operand 3 states. [2020-12-22 07:45:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:12,975 INFO L93 Difference]: Finished difference Result 144135 states and 244224 transitions. [2020-12-22 07:45:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:45:12,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 07:45:12,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:13,196 INFO L225 Difference]: With dead ends: 144135 [2020-12-22 07:45:13,196 INFO L226 Difference]: Without dead ends: 104713 [2020-12-22 07:45:13,280 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 07:45:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104713 states. [2020-12-22 07:45:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104713 to 104711. [2020-12-22 07:45:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104711 states. [2020-12-22 07:45:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104711 states to 104711 states and 176721 transitions. [2020-12-22 07:45:16,016 INFO L78 Accepts]: Start accepts. Automaton has 104711 states and 176721 transitions. Word has length 239 [2020-12-22 07:45:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:16,017 INFO L481 AbstractCegarLoop]: Abstraction has 104711 states and 176721 transitions. [2020-12-22 07:45:16,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:45:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 104711 states and 176721 transitions. [2020-12-22 07:45:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:45:16,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:16,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:16,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:45:16,022 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:16,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1431923240, now seen corresponding path program 1 times [2020-12-22 07:45:16,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:16,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014660997] [2020-12-22 07:45:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:16,504 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 07:45:16,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014660997] [2020-12-22 07:45:16,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:16,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:16,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297388070] [2020-12-22 07:45:16,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:16,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:16,507 INFO L87 Difference]: Start difference. First operand 104711 states and 176721 transitions. Second operand 4 states. [2020-12-22 07:45:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:20,195 INFO L93 Difference]: Finished difference Result 345911 states and 584173 transitions. [2020-12-22 07:45:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:20,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 239 [2020-12-22 07:45:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:20,618 INFO L225 Difference]: With dead ends: 345911 [2020-12-22 07:45:20,618 INFO L226 Difference]: Without dead ends: 241833 [2020-12-22 07:45:20,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241833 states. [2020-12-22 07:45:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241833 to 172390. [2020-12-22 07:45:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172390 states. [2020-12-22 07:45:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172390 states to 172390 states and 290100 transitions. [2020-12-22 07:45:25,392 INFO L78 Accepts]: Start accepts. Automaton has 172390 states and 290100 transitions. Word has length 239 [2020-12-22 07:45:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:25,392 INFO L481 AbstractCegarLoop]: Abstraction has 172390 states and 290100 transitions. [2020-12-22 07:45:25,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 172390 states and 290100 transitions. [2020-12-22 07:45:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 07:45:25,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:25,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:25,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:45:25,395 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash -488423108, now seen corresponding path program 1 times [2020-12-22 07:45:25,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:25,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978935773] [2020-12-22 07:45:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:25,619 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 07:45:25,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978935773] [2020-12-22 07:45:25,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:25,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:25,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382531870] [2020-12-22 07:45:25,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:25,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:25,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:25,622 INFO L87 Difference]: Start difference. First operand 172390 states and 290100 transitions. Second operand 4 states. [2020-12-22 07:45:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:31,547 INFO L93 Difference]: Finished difference Result 569959 states and 959793 transitions. [2020-12-22 07:45:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:31,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2020-12-22 07:45:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:32,634 INFO L225 Difference]: With dead ends: 569959 [2020-12-22 07:45:32,634 INFO L226 Difference]: Without dead ends: 398202 [2020-12-22 07:45:32,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398202 states. [2020-12-22 07:45:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398202 to 283121. [2020-12-22 07:45:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283121 states. [2020-12-22 07:45:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283121 states to 283121 states and 475063 transitions. [2020-12-22 07:45:40,660 INFO L78 Accepts]: Start accepts. Automaton has 283121 states and 475063 transitions. Word has length 240 [2020-12-22 07:45:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:45:40,660 INFO L481 AbstractCegarLoop]: Abstraction has 283121 states and 475063 transitions. [2020-12-22 07:45:40,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:45:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 283121 states and 475063 transitions. [2020-12-22 07:45:40,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 07:45:40,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:45:40,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:45:40,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:45:40,678 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:45:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:45:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash 279386591, now seen corresponding path program 1 times [2020-12-22 07:45:40,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:45:40,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625027695] [2020-12-22 07:45:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:45:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:45:40,943 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 07:45:40,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625027695] [2020-12-22 07:45:40,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:45:40,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:45:40,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401162141] [2020-12-22 07:45:40,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:45:40,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:45:40,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:45:40,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:40,947 INFO L87 Difference]: Start difference. First operand 283121 states and 475063 transitions. Second operand 4 states. [2020-12-22 07:45:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:50,977 INFO L93 Difference]: Finished difference Result 935615 states and 1571029 transitions. [2020-12-22 07:45:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:50,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-12-22 07:45:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:52,629 INFO L225 Difference]: With dead ends: 935615 [2020-12-22 07:45:52,629 INFO L226 Difference]: Without dead ends: 653127 [2020-12-22 07:45:52,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:45:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653127 states. [2020-12-22 07:46:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653127 to 462428. [2020-12-22 07:46:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462428 states. [2020-12-22 07:46:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462428 states to 462428 states and 773710 transitions. [2020-12-22 07:46:09,737 INFO L78 Accepts]: Start accepts. Automaton has 462428 states and 773710 transitions. Word has length 241 [2020-12-22 07:46:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:09,737 INFO L481 AbstractCegarLoop]: Abstraction has 462428 states and 773710 transitions. [2020-12-22 07:46:09,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 462428 states and 773710 transitions. [2020-12-22 07:46:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:46:09,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:09,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:46:09,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:46:09,757 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:09,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1519312173, now seen corresponding path program 1 times [2020-12-22 07:46:09,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:09,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191913193] [2020-12-22 07:46:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:10,052 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 07:46:10,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191913193] [2020-12-22 07:46:10,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:10,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:46:10,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656267891] [2020-12-22 07:46:10,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:46:10,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:46:10,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:46:10,058 INFO L87 Difference]: Start difference. First operand 462428 states and 773710 transitions. Second operand 4 states. [2020-12-22 07:46:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:46:28,371 INFO L93 Difference]: Finished difference Result 1496619 states and 2506113 transitions. [2020-12-22 07:46:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:46:28,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2020-12-22 07:46:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:46:30,958 INFO L225 Difference]: With dead ends: 1496619 [2020-12-22 07:46:30,959 INFO L226 Difference]: Without dead ends: 1034824 [2020-12-22 07:46:31,419 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 07:46:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034824 states. [2020-12-22 07:46:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034824 to 747259. [2020-12-22 07:46:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747259 states. [2020-12-22 07:47:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747259 states to 747259 states and 1246781 transitions. [2020-12-22 07:47:01,134 INFO L78 Accepts]: Start accepts. Automaton has 747259 states and 1246781 transitions. Word has length 242 [2020-12-22 07:47:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:47:01,138 INFO L481 AbstractCegarLoop]: Abstraction has 747259 states and 1246781 transitions. [2020-12-22 07:47:01,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:47:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 747259 states and 1246781 transitions. [2020-12-22 07:47:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 07:47:01,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:47:01,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:47:01,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:47:01,158 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:47:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:47:01,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2074853333, now seen corresponding path program 1 times [2020-12-22 07:47:01,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:47:01,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509250577] [2020-12-22 07:47:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:47:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:47:01,571 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 07:47:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509250577] [2020-12-22 07:47:01,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:47:01,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:47:01,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825802517] [2020-12-22 07:47:01,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:47:01,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:47:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:47:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:47:01,573 INFO L87 Difference]: Start difference. First operand 747259 states and 1246781 transitions. Second operand 7 states. [2020-12-22 07:47:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:47:22,337 INFO L93 Difference]: Finished difference Result 1493889 states and 2492463 transitions. [2020-12-22 07:47:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:47:22,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 244 [2020-12-22 07:47:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:47:23,941 INFO L225 Difference]: With dead ends: 1493889 [2020-12-22 07:47:23,941 INFO L226 Difference]: Without dead ends: 747263 [2020-12-22 07:47:24,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:47:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747263 states. [2020-12-22 07:47:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747263 to 747259. [2020-12-22 07:47:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747259 states.