/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:27:28,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:27:28,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:27:28,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:27:28,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:27:28,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:27:28,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:27:28,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:27:28,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:27:28,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:27:28,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:27:28,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:27:28,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:27:28,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:27:28,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:27:28,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:27:28,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:27:28,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:27:28,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:27:28,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:27:28,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:27:28,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:27:28,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:27:28,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:27:28,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:27:28,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:27:28,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:27:28,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:27:28,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:27:28,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:27:28,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:27:28,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:27:28,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:27:28,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:27:28,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:27:28,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:27:28,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:27:28,680 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:27:28,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:27:28,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:27:28,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:27:28,684 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:27:28,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:27:28,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:27:28,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:27:28,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:27:28,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:27:28,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:27:28,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:27:28,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:27:28,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:27:28,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:27:28,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:27:28,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:27:28,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:27:28,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:27:28,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:27:28,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:27:28,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:27:28,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:27:28,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:27:28,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:27:28,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:27:29,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:27:29,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:27:29,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:27:29,167 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:27:29,168 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:27:29,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2020-12-22 06:27:29,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a403a4ee3/3cfeb8a19ecd4858affab156fd519ba6/FLAG11c5ff4c1 [2020-12-22 06:27:30,048 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:27:30,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2020-12-22 06:27:30,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a403a4ee3/3cfeb8a19ecd4858affab156fd519ba6/FLAG11c5ff4c1 [2020-12-22 06:27:30,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a403a4ee3/3cfeb8a19ecd4858affab156fd519ba6 [2020-12-22 06:27:30,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:27:30,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:27:30,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:27:30,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:27:30,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:27:30,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:27:30" (1/1) ... [2020-12-22 06:27:30,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e711de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:30, skipping insertion in model container [2020-12-22 06:27:30,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:27:30" (1/1) ... [2020-12-22 06:27:30,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:27:30,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:27:31,227 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62058,62071] [2020-12-22 06:27:31,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:27:31,257 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:27:31,401 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62058,62071] [2020-12-22 06:27:31,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:27:31,484 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:27:31,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31 WrapperNode [2020-12-22 06:27:31,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:27:31,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:27:31,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:27:31,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:27:31,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:27:31,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:27:31,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:27:31,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:27:31,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... [2020-12-22 06:27:31,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:27:31,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:27:31,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:27:31,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:27:31,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:27:31,907 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:27:31,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:27:31,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:27:31,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:27:31,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:27:34,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:27:34,243 INFO L299 CfgBuilder]: Removed 267 assume(true) statements. [2020-12-22 06:27:34,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:27:34 BoogieIcfgContainer [2020-12-22 06:27:34,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:27:34,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:27:34,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:27:34,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:27:34,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:27:30" (1/3) ... [2020-12-22 06:27:34,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20be2433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:27:34, skipping insertion in model container [2020-12-22 06:27:34,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:27:31" (2/3) ... [2020-12-22 06:27:34,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20be2433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:27:34, skipping insertion in model container [2020-12-22 06:27:34,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:27:34" (3/3) ... [2020-12-22 06:27:34,257 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product18.cil.c [2020-12-22 06:27:34,264 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:27:34,270 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:27:34,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:27:34,321 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:27:34,321 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:27:34,321 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:27:34,321 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:27:34,321 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:27:34,321 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:27:34,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:27:34,322 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:27:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states. [2020-12-22 06:27:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 06:27:34,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:34,369 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] [2020-12-22 06:27:34,369 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash -167129029, now seen corresponding path program 1 times [2020-12-22 06:27:34,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:34,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310012642] [2020-12-22 06:27:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:35,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310012642] [2020-12-22 06:27:35,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:35,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:35,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606354869] [2020-12-22 06:27:35,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:35,042 INFO L87 Difference]: Start difference. First operand 429 states. Second operand 3 states. [2020-12-22 06:27:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:35,252 INFO L93 Difference]: Finished difference Result 1252 states and 2204 transitions. [2020-12-22 06:27:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:35,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 06:27:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:35,287 INFO L225 Difference]: With dead ends: 1252 [2020-12-22 06:27:35,287 INFO L226 Difference]: Without dead ends: 804 [2020-12-22 06:27:35,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-12-22 06:27:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 411. [2020-12-22 06:27:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-22 06:27:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 718 transitions. [2020-12-22 06:27:35,449 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 718 transitions. Word has length 48 [2020-12-22 06:27:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:35,450 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 718 transitions. [2020-12-22 06:27:35,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 718 transitions. [2020-12-22 06:27:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 06:27:35,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:35,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:35,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:27:35,466 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1311500302, now seen corresponding path program 1 times [2020-12-22 06:27:35,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:35,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408580470] [2020-12-22 06:27:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:35,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408580470] [2020-12-22 06:27:35,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:35,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426906795] [2020-12-22 06:27:35,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:35,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:35,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:35,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:35,696 INFO L87 Difference]: Start difference. First operand 411 states and 718 transitions. Second operand 5 states. [2020-12-22 06:27:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:35,909 INFO L93 Difference]: Finished difference Result 1182 states and 2070 transitions. [2020-12-22 06:27:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:27:35,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-22 06:27:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:35,916 INFO L225 Difference]: With dead ends: 1182 [2020-12-22 06:27:35,917 INFO L226 Difference]: Without dead ends: 790 [2020-12-22 06:27:35,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:27:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2020-12-22 06:27:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 411. [2020-12-22 06:27:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-22 06:27:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 717 transitions. [2020-12-22 06:27:35,949 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 717 transitions. Word has length 50 [2020-12-22 06:27:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:35,949 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 717 transitions. [2020-12-22 06:27:35,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 717 transitions. [2020-12-22 06:27:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:27:35,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:35,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:35,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:27:35,953 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1098779109, now seen corresponding path program 1 times [2020-12-22 06:27:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:35,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018444005] [2020-12-22 06:27:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018444005] [2020-12-22 06:27:36,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:36,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:36,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612957734] [2020-12-22 06:27:36,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:36,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:36,106 INFO L87 Difference]: Start difference. First operand 411 states and 717 transitions. Second operand 3 states. [2020-12-22 06:27:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:36,157 INFO L93 Difference]: Finished difference Result 804 states and 1408 transitions. [2020-12-22 06:27:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:36,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 06:27:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:36,161 INFO L225 Difference]: With dead ends: 804 [2020-12-22 06:27:36,161 INFO L226 Difference]: Without dead ends: 416 [2020-12-22 06:27:36,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-22 06:27:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 411. [2020-12-22 06:27:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-22 06:27:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 716 transitions. [2020-12-22 06:27:36,192 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 716 transitions. Word has length 51 [2020-12-22 06:27:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:36,200 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 716 transitions. [2020-12-22 06:27:36,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 716 transitions. [2020-12-22 06:27:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:27:36,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:36,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:36,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:27:36,206 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:36,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1661226655, now seen corresponding path program 1 times [2020-12-22 06:27:36,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:36,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927135191] [2020-12-22 06:27:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:36,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927135191] [2020-12-22 06:27:36,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:36,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:36,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702182391] [2020-12-22 06:27:36,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:36,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:36,351 INFO L87 Difference]: Start difference. First operand 411 states and 716 transitions. Second operand 3 states. [2020-12-22 06:27:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:36,396 INFO L93 Difference]: Finished difference Result 814 states and 1421 transitions. [2020-12-22 06:27:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:36,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 06:27:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:36,399 INFO L225 Difference]: With dead ends: 814 [2020-12-22 06:27:36,400 INFO L226 Difference]: Without dead ends: 411 [2020-12-22 06:27:36,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-22 06:27:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2020-12-22 06:27:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-22 06:27:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 714 transitions. [2020-12-22 06:27:36,421 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 714 transitions. Word has length 52 [2020-12-22 06:27:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:36,424 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 714 transitions. [2020-12-22 06:27:36,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 714 transitions. [2020-12-22 06:27:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:27:36,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:36,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:36,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:27:36,426 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:36,427 INFO L82 PathProgramCache]: Analyzing trace with hash -755664714, now seen corresponding path program 1 times [2020-12-22 06:27:36,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:36,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337857105] [2020-12-22 06:27:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:36,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337857105] [2020-12-22 06:27:36,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:36,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:36,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090774900] [2020-12-22 06:27:36,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:36,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:36,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:36,567 INFO L87 Difference]: Start difference. First operand 411 states and 714 transitions. Second operand 5 states. [2020-12-22 06:27:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:36,788 INFO L93 Difference]: Finished difference Result 1172 states and 2050 transitions. [2020-12-22 06:27:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:36,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 06:27:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:36,797 INFO L225 Difference]: With dead ends: 1172 [2020-12-22 06:27:36,797 INFO L226 Difference]: Without dead ends: 788 [2020-12-22 06:27:36,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-12-22 06:27:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 411. [2020-12-22 06:27:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-22 06:27:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 713 transitions. [2020-12-22 06:27:36,850 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 713 transitions. Word has length 53 [2020-12-22 06:27:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:36,850 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 713 transitions. [2020-12-22 06:27:36,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 713 transitions. [2020-12-22 06:27:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:27:36,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:36,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:36,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:27:36,854 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:36,855 INFO L82 PathProgramCache]: Analyzing trace with hash 574282393, now seen corresponding path program 1 times [2020-12-22 06:27:36,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:36,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412596180] [2020-12-22 06:27:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:36,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412596180] [2020-12-22 06:27:36,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:36,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:36,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605795052] [2020-12-22 06:27:36,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:36,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:36,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:36,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:36,973 INFO L87 Difference]: Start difference. First operand 411 states and 713 transitions. Second operand 5 states. [2020-12-22 06:27:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:37,170 INFO L93 Difference]: Finished difference Result 1177 states and 2055 transitions. [2020-12-22 06:27:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:37,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:27:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:37,176 INFO L225 Difference]: With dead ends: 1177 [2020-12-22 06:27:37,176 INFO L226 Difference]: Without dead ends: 793 [2020-12-22 06:27:37,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-12-22 06:27:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 411. [2020-12-22 06:27:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-22 06:27:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 712 transitions. [2020-12-22 06:27:37,210 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 712 transitions. Word has length 54 [2020-12-22 06:27:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:37,210 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 712 transitions. [2020-12-22 06:27:37,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 712 transitions. [2020-12-22 06:27:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:27:37,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:37,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:37,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:27:37,212 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash -314537551, now seen corresponding path program 1 times [2020-12-22 06:27:37,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:37,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386764927] [2020-12-22 06:27:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:37,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386764927] [2020-12-22 06:27:37,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:37,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:37,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283959864] [2020-12-22 06:27:37,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:37,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:37,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:37,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:37,281 INFO L87 Difference]: Start difference. First operand 411 states and 712 transitions. Second operand 3 states. [2020-12-22 06:27:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:37,314 INFO L93 Difference]: Finished difference Result 584 states and 1000 transitions. [2020-12-22 06:27:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:37,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 06:27:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:37,318 INFO L225 Difference]: With dead ends: 584 [2020-12-22 06:27:37,318 INFO L226 Difference]: Without dead ends: 414 [2020-12-22 06:27:37,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-22 06:27:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 413. [2020-12-22 06:27:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-12-22 06:27:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 714 transitions. [2020-12-22 06:27:37,346 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 714 transitions. Word has length 55 [2020-12-22 06:27:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:37,347 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 714 transitions. [2020-12-22 06:27:37,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 714 transitions. [2020-12-22 06:27:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:27:37,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:37,348 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:37,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:27:37,349 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:37,349 INFO L82 PathProgramCache]: Analyzing trace with hash -976462689, now seen corresponding path program 1 times [2020-12-22 06:27:37,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:37,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496425005] [2020-12-22 06:27:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:37,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496425005] [2020-12-22 06:27:37,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:37,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:37,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485551066] [2020-12-22 06:27:37,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:37,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:37,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:37,470 INFO L87 Difference]: Start difference. First operand 413 states and 714 transitions. Second operand 3 states. [2020-12-22 06:27:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:37,547 INFO L93 Difference]: Finished difference Result 1125 states and 1966 transitions. [2020-12-22 06:27:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:37,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:27:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:37,553 INFO L225 Difference]: With dead ends: 1125 [2020-12-22 06:27:37,553 INFO L226 Difference]: Without dead ends: 743 [2020-12-22 06:27:37,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-12-22 06:27:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 573. [2020-12-22 06:27:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-12-22 06:27:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1007 transitions. [2020-12-22 06:27:37,607 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1007 transitions. Word has length 63 [2020-12-22 06:27:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:37,607 INFO L481 AbstractCegarLoop]: Abstraction has 573 states and 1007 transitions. [2020-12-22 06:27:37,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1007 transitions. [2020-12-22 06:27:37,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:27:37,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:37,610 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:37,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:27:37,612 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1102022530, now seen corresponding path program 1 times [2020-12-22 06:27:37,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:37,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092927884] [2020-12-22 06:27:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:37,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092927884] [2020-12-22 06:27:37,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:37,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:37,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575198596] [2020-12-22 06:27:37,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:37,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:37,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:37,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:37,745 INFO L87 Difference]: Start difference. First operand 573 states and 1007 transitions. Second operand 5 states. [2020-12-22 06:27:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:37,981 INFO L93 Difference]: Finished difference Result 1649 states and 2927 transitions. [2020-12-22 06:27:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:27:37,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 06:27:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:37,989 INFO L225 Difference]: With dead ends: 1649 [2020-12-22 06:27:37,990 INFO L226 Difference]: Without dead ends: 1107 [2020-12-22 06:27:37,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:27:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2020-12-22 06:27:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 573. [2020-12-22 06:27:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-12-22 06:27:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1005 transitions. [2020-12-22 06:27:38,047 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1005 transitions. Word has length 64 [2020-12-22 06:27:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:38,047 INFO L481 AbstractCegarLoop]: Abstraction has 573 states and 1005 transitions. [2020-12-22 06:27:38,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1005 transitions. [2020-12-22 06:27:38,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:27:38,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:38,049 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:38,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:27:38,049 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:38,050 INFO L82 PathProgramCache]: Analyzing trace with hash -413552043, now seen corresponding path program 1 times [2020-12-22 06:27:38,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:38,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196708392] [2020-12-22 06:27:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:38,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196708392] [2020-12-22 06:27:38,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:38,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:38,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725756676] [2020-12-22 06:27:38,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:38,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:38,132 INFO L87 Difference]: Start difference. First operand 573 states and 1005 transitions. Second operand 3 states. [2020-12-22 06:27:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:38,216 INFO L93 Difference]: Finished difference Result 1647 states and 2919 transitions. [2020-12-22 06:27:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:38,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 06:27:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:38,223 INFO L225 Difference]: With dead ends: 1647 [2020-12-22 06:27:38,224 INFO L226 Difference]: Without dead ends: 1105 [2020-12-22 06:27:38,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2020-12-22 06:27:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 935. [2020-12-22 06:27:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 935 states. [2020-12-22 06:27:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1668 transitions. [2020-12-22 06:27:38,303 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1668 transitions. Word has length 65 [2020-12-22 06:27:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:38,303 INFO L481 AbstractCegarLoop]: Abstraction has 935 states and 1668 transitions. [2020-12-22 06:27:38,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1668 transitions. [2020-12-22 06:27:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:27:38,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:38,306 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:38,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:27:38,306 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash -369162253, now seen corresponding path program 1 times [2020-12-22 06:27:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939039197] [2020-12-22 06:27:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:38,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939039197] [2020-12-22 06:27:38,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551797395] [2020-12-22 06:27:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:27:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:38,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:27:38,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:27:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:38,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:27:38,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:27:38,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333450196] [2020-12-22 06:27:38,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:38,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:38,912 INFO L87 Difference]: Start difference. First operand 935 states and 1668 transitions. Second operand 5 states. [2020-12-22 06:27:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:39,065 INFO L93 Difference]: Finished difference Result 1494 states and 2632 transitions. [2020-12-22 06:27:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:27:39,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 06:27:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:39,074 INFO L225 Difference]: With dead ends: 1494 [2020-12-22 06:27:39,074 INFO L226 Difference]: Without dead ends: 1324 [2020-12-22 06:27:39,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2020-12-22 06:27:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1151. [2020-12-22 06:27:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2020-12-22 06:27:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2058 transitions. [2020-12-22 06:27:39,166 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2058 transitions. Word has length 65 [2020-12-22 06:27:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:39,167 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 2058 transitions. [2020-12-22 06:27:39,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2058 transitions. [2020-12-22 06:27:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:27:39,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:39,170 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] [2020-12-22 06:27:39,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:27:39,386 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:39,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1761324656, now seen corresponding path program 1 times [2020-12-22 06:27:39,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:39,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125786020] [2020-12-22 06:27:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:39,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125786020] [2020-12-22 06:27:39,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:39,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:39,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25493981] [2020-12-22 06:27:39,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:39,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:39,470 INFO L87 Difference]: Start difference. First operand 1151 states and 2058 transitions. Second operand 3 states. [2020-12-22 06:27:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:39,613 INFO L93 Difference]: Finished difference Result 3087 states and 5548 transitions. [2020-12-22 06:27:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:39,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:27:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:39,628 INFO L225 Difference]: With dead ends: 3087 [2020-12-22 06:27:39,628 INFO L226 Difference]: Without dead ends: 2037 [2020-12-22 06:27:39,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2020-12-22 06:27:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1867. [2020-12-22 06:27:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1867 states. [2020-12-22 06:27:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3363 transitions. [2020-12-22 06:27:39,815 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3363 transitions. Word has length 69 [2020-12-22 06:27:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:39,817 INFO L481 AbstractCegarLoop]: Abstraction has 1867 states and 3363 transitions. [2020-12-22 06:27:39,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3363 transitions. [2020-12-22 06:27:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:27:39,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:39,822 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] [2020-12-22 06:27:39,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:27:39,822 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -745059344, now seen corresponding path program 1 times [2020-12-22 06:27:39,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:39,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838429144] [2020-12-22 06:27:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838429144] [2020-12-22 06:27:39,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:39,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:39,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507561524] [2020-12-22 06:27:39,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:39,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:39,925 INFO L87 Difference]: Start difference. First operand 1867 states and 3363 transitions. Second operand 3 states. [2020-12-22 06:27:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:40,124 INFO L93 Difference]: Finished difference Result 4971 states and 8982 transitions. [2020-12-22 06:27:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:40,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:27:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:40,146 INFO L225 Difference]: With dead ends: 4971 [2020-12-22 06:27:40,147 INFO L226 Difference]: Without dead ends: 3239 [2020-12-22 06:27:40,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2020-12-22 06:27:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3069. [2020-12-22 06:27:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3069 states. [2020-12-22 06:27:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 5548 transitions. [2020-12-22 06:27:40,433 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 5548 transitions. Word has length 70 [2020-12-22 06:27:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:40,433 INFO L481 AbstractCegarLoop]: Abstraction has 3069 states and 5548 transitions. [2020-12-22 06:27:40,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 5548 transitions. [2020-12-22 06:27:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:27:40,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:40,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:40,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:27:40,439 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:40,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1574191137, now seen corresponding path program 1 times [2020-12-22 06:27:40,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:40,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420787196] [2020-12-22 06:27:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:40,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420787196] [2020-12-22 06:27:40,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:40,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:40,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686009883] [2020-12-22 06:27:40,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:40,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:40,529 INFO L87 Difference]: Start difference. First operand 3069 states and 5548 transitions. Second operand 3 states. [2020-12-22 06:27:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:40,906 INFO L93 Difference]: Finished difference Result 8293 states and 15020 transitions. [2020-12-22 06:27:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:40,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:27:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:40,942 INFO L225 Difference]: With dead ends: 8293 [2020-12-22 06:27:40,942 INFO L226 Difference]: Without dead ends: 5393 [2020-12-22 06:27:40,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5393 states. [2020-12-22 06:27:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5393 to 5223. [2020-12-22 06:27:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5223 states. [2020-12-22 06:27:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5223 states to 5223 states and 9453 transitions. [2020-12-22 06:27:41,357 INFO L78 Accepts]: Start accepts. Automaton has 5223 states and 9453 transitions. Word has length 71 [2020-12-22 06:27:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:41,357 INFO L481 AbstractCegarLoop]: Abstraction has 5223 states and 9453 transitions. [2020-12-22 06:27:41,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:41,357 INFO L276 IsEmpty]: Start isEmpty. Operand 5223 states and 9453 transitions. [2020-12-22 06:27:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:27:41,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:41,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:41,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:27:41,367 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1919847553, now seen corresponding path program 1 times [2020-12-22 06:27:41,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:41,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333352418] [2020-12-22 06:27:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:41,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333352418] [2020-12-22 06:27:41,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:41,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:41,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513798386] [2020-12-22 06:27:41,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:41,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:41,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:41,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:41,442 INFO L87 Difference]: Start difference. First operand 5223 states and 9453 transitions. Second operand 3 states. [2020-12-22 06:27:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:42,012 INFO L93 Difference]: Finished difference Result 15213 states and 27577 transitions. [2020-12-22 06:27:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:42,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 06:27:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:42,076 INFO L225 Difference]: With dead ends: 15213 [2020-12-22 06:27:42,077 INFO L226 Difference]: Without dead ends: 10163 [2020-12-22 06:27:42,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2020-12-22 06:27:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 9993. [2020-12-22 06:27:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9993 states. [2020-12-22 06:27:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9993 states to 9993 states and 18094 transitions. [2020-12-22 06:27:42,777 INFO L78 Accepts]: Start accepts. Automaton has 9993 states and 18094 transitions. Word has length 72 [2020-12-22 06:27:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:42,778 INFO L481 AbstractCegarLoop]: Abstraction has 9993 states and 18094 transitions. [2020-12-22 06:27:42,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 9993 states and 18094 transitions. [2020-12-22 06:27:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:27:42,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:42,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:42,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:27:42,787 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1449427056, now seen corresponding path program 1 times [2020-12-22 06:27:42,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:42,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807628200] [2020-12-22 06:27:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807628200] [2020-12-22 06:27:42,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:42,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:42,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994915501] [2020-12-22 06:27:42,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:42,871 INFO L87 Difference]: Start difference. First operand 9993 states and 18094 transitions. Second operand 3 states. [2020-12-22 06:27:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:43,984 INFO L93 Difference]: Finished difference Result 29225 states and 52975 transitions. [2020-12-22 06:27:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:43,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 06:27:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:44,048 INFO L225 Difference]: With dead ends: 29225 [2020-12-22 06:27:44,049 INFO L226 Difference]: Without dead ends: 19413 [2020-12-22 06:27:44,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19413 states. [2020-12-22 06:27:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19413 to 19243. [2020-12-22 06:27:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19243 states. [2020-12-22 06:27:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19243 states to 19243 states and 34831 transitions. [2020-12-22 06:27:45,245 INFO L78 Accepts]: Start accepts. Automaton has 19243 states and 34831 transitions. Word has length 73 [2020-12-22 06:27:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:45,245 INFO L481 AbstractCegarLoop]: Abstraction has 19243 states and 34831 transitions. [2020-12-22 06:27:45,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 19243 states and 34831 transitions. [2020-12-22 06:27:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 06:27:45,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:45,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:45,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:27:45,258 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash 311731011, now seen corresponding path program 1 times [2020-12-22 06:27:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:45,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683293931] [2020-12-22 06:27:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:45,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683293931] [2020-12-22 06:27:45,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:45,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:45,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395538978] [2020-12-22 06:27:45,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:45,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:45,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:45,338 INFO L87 Difference]: Start difference. First operand 19243 states and 34831 transitions. Second operand 3 states. [2020-12-22 06:27:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:46,959 INFO L93 Difference]: Finished difference Result 57161 states and 103500 transitions. [2020-12-22 06:27:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:46,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 06:27:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:47,089 INFO L225 Difference]: With dead ends: 57161 [2020-12-22 06:27:47,089 INFO L226 Difference]: Without dead ends: 38103 [2020-12-22 06:27:47,122 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 06:27:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38103 states. [2020-12-22 06:27:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38103 to 37933. [2020-12-22 06:27:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37933 states. [2020-12-22 06:27:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37933 states to 37933 states and 68560 transitions. [2020-12-22 06:27:49,238 INFO L78 Accepts]: Start accepts. Automaton has 37933 states and 68560 transitions. Word has length 74 [2020-12-22 06:27:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:49,238 INFO L481 AbstractCegarLoop]: Abstraction has 37933 states and 68560 transitions. [2020-12-22 06:27:49,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 37933 states and 68560 transitions. [2020-12-22 06:27:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 06:27:49,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:49,252 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:49,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:27:49,253 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2121742825, now seen corresponding path program 1 times [2020-12-22 06:27:49,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:49,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027881382] [2020-12-22 06:27:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:27:49,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027881382] [2020-12-22 06:27:49,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:49,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:27:49,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704190437] [2020-12-22 06:27:49,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:27:49,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:49,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:27:49,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:27:49,347 INFO L87 Difference]: Start difference. First operand 37933 states and 68560 transitions. Second operand 5 states. [2020-12-22 06:27:49,576 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-22 06:27:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:52,284 INFO L93 Difference]: Finished difference Result 111502 states and 201493 transitions. [2020-12-22 06:27:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:27:52,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 06:27:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:52,454 INFO L225 Difference]: With dead ends: 111502 [2020-12-22 06:27:52,454 INFO L226 Difference]: Without dead ends: 73822 [2020-12-22 06:27:52,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:27:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73822 states. [2020-12-22 06:27:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73822 to 37933. [2020-12-22 06:27:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37933 states. [2020-12-22 06:27:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37933 states to 37933 states and 68302 transitions. [2020-12-22 06:27:54,765 INFO L78 Accepts]: Start accepts. Automaton has 37933 states and 68302 transitions. Word has length 75 [2020-12-22 06:27:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:54,765 INFO L481 AbstractCegarLoop]: Abstraction has 37933 states and 68302 transitions. [2020-12-22 06:27:54,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:27:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 37933 states and 68302 transitions. [2020-12-22 06:27:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 06:27:54,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:54,780 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:54,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:27:54,780 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2077353035, now seen corresponding path program 2 times [2020-12-22 06:27:54,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:54,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982475530] [2020-12-22 06:27:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:54,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982475530] [2020-12-22 06:27:54,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:54,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:54,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212396223] [2020-12-22 06:27:54,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:54,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:54,851 INFO L87 Difference]: Start difference. First operand 37933 states and 68302 transitions. Second operand 3 states. [2020-12-22 06:27:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:27:57,021 INFO L93 Difference]: Finished difference Result 75777 states and 136454 transitions. [2020-12-22 06:27:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:27:57,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 06:27:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:27:57,097 INFO L225 Difference]: With dead ends: 75777 [2020-12-22 06:27:57,097 INFO L226 Difference]: Without dead ends: 38103 [2020-12-22 06:27:57,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38103 states. [2020-12-22 06:27:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38103 to 37933. [2020-12-22 06:27:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37933 states. [2020-12-22 06:27:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37933 states to 37933 states and 68174 transitions. [2020-12-22 06:27:59,235 INFO L78 Accepts]: Start accepts. Automaton has 37933 states and 68174 transitions. Word has length 75 [2020-12-22 06:27:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:27:59,235 INFO L481 AbstractCegarLoop]: Abstraction has 37933 states and 68174 transitions. [2020-12-22 06:27:59,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:27:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 37933 states and 68174 transitions. [2020-12-22 06:27:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 06:27:59,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:27:59,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:27:59,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:27:59,247 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:27:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:27:59,247 INFO L82 PathProgramCache]: Analyzing trace with hash 986453986, now seen corresponding path program 1 times [2020-12-22 06:27:59,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:27:59,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635536907] [2020-12-22 06:27:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:27:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:27:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:27:59,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635536907] [2020-12-22 06:27:59,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:27:59,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:27:59,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440405745] [2020-12-22 06:27:59,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:27:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:27:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:27:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:27:59,318 INFO L87 Difference]: Start difference. First operand 37933 states and 68174 transitions. Second operand 3 states. [2020-12-22 06:28:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:02,104 INFO L93 Difference]: Finished difference Result 105387 states and 189136 transitions. [2020-12-22 06:28:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:28:02,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 06:28:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:02,230 INFO L225 Difference]: With dead ends: 105387 [2020-12-22 06:28:02,230 INFO L226 Difference]: Without dead ends: 67673 [2020-12-22 06:28:02,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:28:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67673 states. [2020-12-22 06:28:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67673 to 67503. [2020-12-22 06:28:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67503 states. [2020-12-22 06:28:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67503 states to 67503 states and 120783 transitions. [2020-12-22 06:28:05,409 INFO L78 Accepts]: Start accepts. Automaton has 67503 states and 120783 transitions. Word has length 75 [2020-12-22 06:28:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:05,409 INFO L481 AbstractCegarLoop]: Abstraction has 67503 states and 120783 transitions. [2020-12-22 06:28:05,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:28:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 67503 states and 120783 transitions. [2020-12-22 06:28:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:28:05,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:05,421 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:05,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:28:05,421 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash 195570043, now seen corresponding path program 1 times [2020-12-22 06:28:05,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:05,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103134023] [2020-12-22 06:28:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:05,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103134023] [2020-12-22 06:28:05,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:05,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:05,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110531138] [2020-12-22 06:28:05,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:28:05,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:05,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:28:05,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:28:05,499 INFO L87 Difference]: Start difference. First operand 67503 states and 120783 transitions. Second operand 4 states. [2020-12-22 06:28:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:07,784 INFO L93 Difference]: Finished difference Result 67614 states and 120966 transitions. [2020-12-22 06:28:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:28:07,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 06:28:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:07,894 INFO L225 Difference]: With dead ends: 67614 [2020-12-22 06:28:07,894 INFO L226 Difference]: Without dead ends: 67503 [2020-12-22 06:28:07,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67503 states. [2020-12-22 06:28:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67503 to 67503. [2020-12-22 06:28:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67503 states. [2020-12-22 06:28:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67503 states to 67503 states and 120781 transitions. [2020-12-22 06:28:11,075 INFO L78 Accepts]: Start accepts. Automaton has 67503 states and 120781 transitions. Word has length 76 [2020-12-22 06:28:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:11,076 INFO L481 AbstractCegarLoop]: Abstraction has 67503 states and 120781 transitions. [2020-12-22 06:28:11,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:28:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 67503 states and 120781 transitions. [2020-12-22 06:28:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:28:11,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:11,086 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:11,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:28:11,087 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash -501505064, now seen corresponding path program 1 times [2020-12-22 06:28:11,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:11,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260016251] [2020-12-22 06:28:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:11,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260016251] [2020-12-22 06:28:11,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:11,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:11,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663270719] [2020-12-22 06:28:11,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:28:11,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:28:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:11,178 INFO L87 Difference]: Start difference. First operand 67503 states and 120781 transitions. Second operand 5 states. [2020-12-22 06:28:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:13,810 INFO L93 Difference]: Finished difference Result 68008 states and 121607 transitions. [2020-12-22 06:28:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:28:13,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-12-22 06:28:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:13,912 INFO L225 Difference]: With dead ends: 68008 [2020-12-22 06:28:13,912 INFO L226 Difference]: Without dead ends: 67898 [2020-12-22 06:28:13,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:28:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67898 states. [2020-12-22 06:28:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67898 to 67597. [2020-12-22 06:28:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67597 states. [2020-12-22 06:28:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67597 states to 67597 states and 120934 transitions. [2020-12-22 06:28:16,622 INFO L78 Accepts]: Start accepts. Automaton has 67597 states and 120934 transitions. Word has length 79 [2020-12-22 06:28:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:16,626 INFO L481 AbstractCegarLoop]: Abstraction has 67597 states and 120934 transitions. [2020-12-22 06:28:16,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:28:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 67597 states and 120934 transitions. [2020-12-22 06:28:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 06:28:16,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:16,639 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:16,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:28:16,640 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash -468183532, now seen corresponding path program 1 times [2020-12-22 06:28:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:16,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631056128] [2020-12-22 06:28:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:16,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631056128] [2020-12-22 06:28:16,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:16,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:28:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534324958] [2020-12-22 06:28:16,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:28:16,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:28:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:28:16,770 INFO L87 Difference]: Start difference. First operand 67597 states and 120934 transitions. Second operand 9 states. [2020-12-22 06:28:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:19,570 INFO L93 Difference]: Finished difference Result 67796 states and 121256 transitions. [2020-12-22 06:28:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 06:28:19,571 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-12-22 06:28:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:19,680 INFO L225 Difference]: With dead ends: 67796 [2020-12-22 06:28:19,680 INFO L226 Difference]: Without dead ends: 67595 [2020-12-22 06:28:19,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-12-22 06:28:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67595 states. [2020-12-22 06:28:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67595 to 67577. [2020-12-22 06:28:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67577 states. [2020-12-22 06:28:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67577 states to 67577 states and 120897 transitions. [2020-12-22 06:28:22,699 INFO L78 Accepts]: Start accepts. Automaton has 67577 states and 120897 transitions. Word has length 80 [2020-12-22 06:28:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:22,699 INFO L481 AbstractCegarLoop]: Abstraction has 67577 states and 120897 transitions. [2020-12-22 06:28:22,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:28:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 67577 states and 120897 transitions. [2020-12-22 06:28:22,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 06:28:22,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:22,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:22,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:28:22,727 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash 574688923, now seen corresponding path program 1 times [2020-12-22 06:28:22,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:22,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554849470] [2020-12-22 06:28:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:22,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554849470] [2020-12-22 06:28:22,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:22,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:28:22,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377252786] [2020-12-22 06:28:22,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:28:22,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:28:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:28:22,827 INFO L87 Difference]: Start difference. First operand 67577 states and 120897 transitions. Second operand 5 states. [2020-12-22 06:28:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:25,547 INFO L93 Difference]: Finished difference Result 68295 states and 122033 transitions. [2020-12-22 06:28:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:28:25,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-12-22 06:28:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:25,659 INFO L225 Difference]: With dead ends: 68295 [2020-12-22 06:28:25,659 INFO L226 Difference]: Without dead ends: 68086 [2020-12-22 06:28:25,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:28:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68086 states. [2020-12-22 06:28:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68086 to 67735. [2020-12-22 06:28:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67735 states. [2020-12-22 06:28:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67735 states to 67735 states and 121147 transitions. [2020-12-22 06:28:28,799 INFO L78 Accepts]: Start accepts. Automaton has 67735 states and 121147 transitions. Word has length 92 [2020-12-22 06:28:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:28,799 INFO L481 AbstractCegarLoop]: Abstraction has 67735 states and 121147 transitions. [2020-12-22 06:28:28,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:28:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 67735 states and 121147 transitions. [2020-12-22 06:28:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 06:28:28,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:28,830 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:28,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:28:28,830 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:28,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1540999444, now seen corresponding path program 1 times [2020-12-22 06:28:28,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:28,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068131191] [2020-12-22 06:28:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:29,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068131191] [2020-12-22 06:28:29,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:29,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:28:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186819152] [2020-12-22 06:28:29,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:28:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:28:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:28:29,202 INFO L87 Difference]: Start difference. First operand 67735 states and 121147 transitions. Second operand 9 states. [2020-12-22 06:28:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:31,888 INFO L93 Difference]: Finished difference Result 68075 states and 121695 transitions. [2020-12-22 06:28:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 06:28:31,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 06:28:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:31,993 INFO L225 Difference]: With dead ends: 68075 [2020-12-22 06:28:31,994 INFO L226 Difference]: Without dead ends: 67722 [2020-12-22 06:28:32,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-12-22 06:28:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67722 states. [2020-12-22 06:28:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67722 to 67645. [2020-12-22 06:28:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67645 states. [2020-12-22 06:28:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67645 states to 67645 states and 120996 transitions. [2020-12-22 06:28:34,900 INFO L78 Accepts]: Start accepts. Automaton has 67645 states and 120996 transitions. Word has length 93 [2020-12-22 06:28:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:34,901 INFO L481 AbstractCegarLoop]: Abstraction has 67645 states and 120996 transitions. [2020-12-22 06:28:34,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:28:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 67645 states and 120996 transitions. [2020-12-22 06:28:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 06:28:34,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:34,922 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:34,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:28:34,922 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:34,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:34,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1731277564, now seen corresponding path program 1 times [2020-12-22 06:28:34,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:34,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114615839] [2020-12-22 06:28:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:35,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114615839] [2020-12-22 06:28:35,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:35,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:28:35,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077329798] [2020-12-22 06:28:35,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:28:35,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:35,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:28:35,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:28:35,060 INFO L87 Difference]: Start difference. First operand 67645 states and 120996 transitions. Second operand 10 states. [2020-12-22 06:28:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:38,773 INFO L93 Difference]: Finished difference Result 69508 states and 123872 transitions. [2020-12-22 06:28:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 06:28:38,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2020-12-22 06:28:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:38,879 INFO L225 Difference]: With dead ends: 69508 [2020-12-22 06:28:38,880 INFO L226 Difference]: Without dead ends: 69306 [2020-12-22 06:28:38,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 06:28:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69306 states. [2020-12-22 06:28:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69306 to 67759. [2020-12-22 06:28:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67759 states. [2020-12-22 06:28:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67759 states to 67759 states and 121166 transitions. [2020-12-22 06:28:41,934 INFO L78 Accepts]: Start accepts. Automaton has 67759 states and 121166 transitions. Word has length 95 [2020-12-22 06:28:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:41,934 INFO L481 AbstractCegarLoop]: Abstraction has 67759 states and 121166 transitions. [2020-12-22 06:28:41,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:28:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 67759 states and 121166 transitions. [2020-12-22 06:28:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:28:41,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:41,960 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:41,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 06:28:41,960 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1289915488, now seen corresponding path program 1 times [2020-12-22 06:28:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:41,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933214279] [2020-12-22 06:28:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:28:42,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933214279] [2020-12-22 06:28:42,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:28:42,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:28:42,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363105894] [2020-12-22 06:28:42,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:28:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:28:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:28:42,342 INFO L87 Difference]: Start difference. First operand 67759 states and 121166 transitions. Second operand 9 states. [2020-12-22 06:28:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:28:45,752 INFO L93 Difference]: Finished difference Result 70261 states and 125006 transitions. [2020-12-22 06:28:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 06:28:45,753 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 96 [2020-12-22 06:28:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:28:45,873 INFO L225 Difference]: With dead ends: 70261 [2020-12-22 06:28:45,873 INFO L226 Difference]: Without dead ends: 69984 [2020-12-22 06:28:45,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=750, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 06:28:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69984 states. [2020-12-22 06:28:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69984 to 68020. [2020-12-22 06:28:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68020 states. [2020-12-22 06:28:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68020 states to 68020 states and 121567 transitions. [2020-12-22 06:28:49,233 INFO L78 Accepts]: Start accepts. Automaton has 68020 states and 121567 transitions. Word has length 96 [2020-12-22 06:28:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:28:49,234 INFO L481 AbstractCegarLoop]: Abstraction has 68020 states and 121567 transitions. [2020-12-22 06:28:49,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:28:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 68020 states and 121567 transitions. [2020-12-22 06:28:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:28:49,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:28:49,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:28:49,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 06:28:49,259 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:28:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:28:49,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1690687660, now seen corresponding path program 1 times [2020-12-22 06:28:49,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:28:49,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955006172] [2020-12-22 06:28:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:28:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:28:49,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955006172] [2020-12-22 06:28:49,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307286808] [2020-12-22 06:28:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:28:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:28:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 06:28:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:28:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:28:49,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:28:49,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 06:28:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303437128] [2020-12-22 06:28:49,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 06:28:49,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:28:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 06:28:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-22 06:28:49,974 INFO L87 Difference]: Start difference. First operand 68020 states and 121567 transitions. Second operand 15 states. [2020-12-22 06:29:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:08,492 INFO L93 Difference]: Finished difference Result 236073 states and 414834 transitions. [2020-12-22 06:29:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-12-22 06:29:08,493 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-12-22 06:29:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:09,199 INFO L225 Difference]: With dead ends: 236073 [2020-12-22 06:29:09,200 INFO L226 Difference]: Without dead ends: 235386 [2020-12-22 06:29:09,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7047 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2020-12-22 06:29:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235386 states. [2020-12-22 06:29:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235386 to 140568. [2020-12-22 06:29:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140568 states. [2020-12-22 06:29:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140568 states to 140568 states and 250950 transitions. [2020-12-22 06:29:17,482 INFO L78 Accepts]: Start accepts. Automaton has 140568 states and 250950 transitions. Word has length 96 [2020-12-22 06:29:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:17,482 INFO L481 AbstractCegarLoop]: Abstraction has 140568 states and 250950 transitions. [2020-12-22 06:29:17,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 06:29:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 140568 states and 250950 transitions. [2020-12-22 06:29:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:29:17,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:17,537 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] [2020-12-22 06:29:17,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 06:29:17,746 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 690301454, now seen corresponding path program 1 times [2020-12-22 06:29:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770306433] [2020-12-22 06:29:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:29:17,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770306433] [2020-12-22 06:29:17,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:17,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:17,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369544328] [2020-12-22 06:29:17,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:17,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:17,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:17,814 INFO L87 Difference]: Start difference. First operand 140568 states and 250950 transitions. Second operand 3 states. [2020-12-22 06:29:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:29:29,984 INFO L93 Difference]: Finished difference Result 408994 states and 730444 transitions. [2020-12-22 06:29:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:29:29,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 06:29:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:29:30,756 INFO L225 Difference]: With dead ends: 408994 [2020-12-22 06:29:30,757 INFO L226 Difference]: Without dead ends: 271896 [2020-12-22 06:29:30,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271896 states. [2020-12-22 06:29:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271896 to 270046. [2020-12-22 06:29:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270046 states. [2020-12-22 06:29:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270046 states to 270046 states and 481592 transitions. [2020-12-22 06:29:48,354 INFO L78 Accepts]: Start accepts. Automaton has 270046 states and 481592 transitions. Word has length 96 [2020-12-22 06:29:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:29:48,355 INFO L481 AbstractCegarLoop]: Abstraction has 270046 states and 481592 transitions. [2020-12-22 06:29:48,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:29:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 270046 states and 481592 transitions. [2020-12-22 06:29:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 06:29:48,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:29:48,432 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] [2020-12-22 06:29:48,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 06:29:48,432 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:29:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:29:48,433 INFO L82 PathProgramCache]: Analyzing trace with hash 74305210, now seen corresponding path program 1 times [2020-12-22 06:29:48,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:29:48,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872709302] [2020-12-22 06:29:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:29:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:29:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:29:48,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872709302] [2020-12-22 06:29:48,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:29:48,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:29:48,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999777036] [2020-12-22 06:29:48,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:29:48,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:29:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:29:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:29:48,521 INFO L87 Difference]: Start difference. First operand 270046 states and 481592 transitions. Second operand 3 states. [2020-12-22 06:30:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:08,342 INFO L93 Difference]: Finished difference Result 473812 states and 841236 transitions. [2020-12-22 06:30:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:30:08,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 06:30:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:30:09,991 INFO L225 Difference]: With dead ends: 473812 [2020-12-22 06:30:09,991 INFO L226 Difference]: Without dead ends: 471962 [2020-12-22 06:30:10,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:30:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471962 states. [2020-12-22 06:30:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471962 to 470112. [2020-12-22 06:30:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470112 states. [2020-12-22 06:30:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470112 states to 470112 states and 833460 transitions. [2020-12-22 06:30:36,809 INFO L78 Accepts]: Start accepts. Automaton has 470112 states and 833460 transitions. Word has length 97 [2020-12-22 06:30:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:30:36,810 INFO L481 AbstractCegarLoop]: Abstraction has 470112 states and 833460 transitions. [2020-12-22 06:30:36,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:30:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 470112 states and 833460 transitions. [2020-12-22 06:30:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 06:30:36,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:30:36,894 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] [2020-12-22 06:30:36,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 06:30:36,895 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:30:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:30:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1715765284, now seen corresponding path program 1 times [2020-12-22 06:30:36,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:30:36,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23329151] [2020-12-22 06:30:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:30:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:30:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:30:36,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23329151] [2020-12-22 06:30:36,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:30:36,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:30:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668777259] [2020-12-22 06:30:36,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:30:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:30:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:30:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:30:36,993 INFO L87 Difference]: Start difference. First operand 470112 states and 833460 transitions. Second operand 7 states. [2020-12-22 06:30:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:30:58,956 INFO L93 Difference]: Finished difference Result 471864 states and 836160 transitions. [2020-12-22 06:30:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:30:58,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-12-22 06:30:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:31:00,523 INFO L225 Difference]: With dead ends: 471864 [2020-12-22 06:31:00,523 INFO L226 Difference]: Without dead ends: 470213 [2020-12-22 06:31:00,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:31:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470213 states.