/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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:21:54,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:21:54,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:21:54,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:21:54,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:21:54,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:21:54,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:21:54,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:21:54,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:21:54,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:21:54,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:21:54,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:21:54,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:21:54,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:21:54,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:21:54,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:21:54,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:21:54,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:21:54,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:21:54,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:21:54,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:21:54,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:21:54,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:21:54,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:21:54,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:21:54,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:21:54,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:21:54,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:21:54,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:21:54,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:21:54,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:21:54,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:21:54,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:21:54,772 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:21:54,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:21:54,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:21:54,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:21:54,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:21:54,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:21:54,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:21:54,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:21:54,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:21:54,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:21:54,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:21:54,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:21:54,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:21:54,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:21:54,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:21:54,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:21:54,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:21:54,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:21:54,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:21:54,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:21:54,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:21:54,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:21:55,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:21:55,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:21:55,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:21:55,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:21:55,200 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:21:55,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c [2020-12-22 10:21:55,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7549acff/92fc79fb30e5456da7c4d5dae8f03cc1/FLAG697ab52fe [2020-12-22 10:21:56,381 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:21:56,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c [2020-12-22 10:21:56,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7549acff/92fc79fb30e5456da7c4d5dae8f03cc1/FLAG697ab52fe [2020-12-22 10:21:56,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7549acff/92fc79fb30e5456da7c4d5dae8f03cc1 [2020-12-22 10:21:56,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:21:56,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:21:56,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:21:56,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:21:56,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:21:56,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:21:56" (1/1) ... [2020-12-22 10:21:56,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716d8ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:56, skipping insertion in model container [2020-12-22 10:21:56,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:21:56" (1/1) ... [2020-12-22 10:21:56,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:21:57,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:21:57,628 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[26847,26860] [2020-12-22 10:21:57,659 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[28941,28954] [2020-12-22 10:21:58,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:58,585 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:21:58,640 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[26847,26860] [2020-12-22 10:21:58,645 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/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[28941,28954] [2020-12-22 10:21:59,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:21:59,311 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:21:59,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59 WrapperNode [2020-12-22 10:21:59,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:21:59,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:59,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:21:59,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:21:59,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:21:59,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:21:59,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:21:59,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:21:59,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:21:59,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:21:59,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:21:59,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:22:00,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:22:00,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:22:00,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:22:00,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:22:00,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (1/1) ... [2020-12-22 10:22:00,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:22:00,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:22:00,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:22:00,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:22:00,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (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 10:22:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:22:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:22:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:22:00,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:22:06,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:22:06,268 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:22:06,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:06 BoogieIcfgContainer [2020-12-22 10:22:06,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:22:06,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:22:06,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:22:06,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:22:06,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:21:56" (1/3) ... [2020-12-22 10:22:06,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733af44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:06, skipping insertion in model container [2020-12-22 10:22:06,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:21:59" (2/3) ... [2020-12-22 10:22:06,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733af44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:22:06, skipping insertion in model container [2020-12-22 10:22:06,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:22:06" (3/3) ... [2020-12-22 10:22:06,283 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c [2020-12-22 10:22:06,290 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:22:06,296 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:22:06,333 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:22:06,387 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:22:06,387 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:22:06,387 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:22:06,388 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:22:06,388 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:22:06,388 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:22:06,388 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:22:06,388 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:22:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:22:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:22:06,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:06,434 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] [2020-12-22 10:22:06,435 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:06,442 INFO L82 PathProgramCache]: Analyzing trace with hash 193046949, now seen corresponding path program 1 times [2020-12-22 10:22:06,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:06,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830792566] [2020-12-22 10:22:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:06,799 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 10:22:06,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830792566] [2020-12-22 10:22:06,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:06,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:22:06,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505737169] [2020-12-22 10:22:06,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:06,833 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 3 states. [2020-12-22 10:22:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:13,004 INFO L93 Difference]: Finished difference Result 2614 states and 5014 transitions. [2020-12-22 10:22:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:13,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 10:22:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:13,042 INFO L225 Difference]: With dead ends: 2614 [2020-12-22 10:22:13,042 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:22:13,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:22:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:22:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:22:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 3027 transitions. [2020-12-22 10:22:13,228 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 3027 transitions. Word has length 20 [2020-12-22 10:22:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:13,229 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 3027 transitions. [2020-12-22 10:22:13,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 3027 transitions. [2020-12-22 10:22:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:22:13,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:13,236 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] [2020-12-22 10:22:13,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:22:13,237 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:22:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:13,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337750001] [2020-12-22 10:22:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:13,484 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 10:22:13,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337750001] [2020-12-22 10:22:13,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:13,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:22:13,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994990541] [2020-12-22 10:22:13,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:22:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:22:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:22:13,490 INFO L87 Difference]: Start difference. First operand 1648 states and 3027 transitions. Second operand 5 states. [2020-12-22 10:22:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:13,639 INFO L93 Difference]: Finished difference Result 1728 states and 3152 transitions. [2020-12-22 10:22:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:22:13,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:22:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:13,651 INFO L225 Difference]: With dead ends: 1728 [2020-12-22 10:22:13,651 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 10:22:13,653 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 10:22:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 10:22:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2020-12-22 10:22:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1648 states. [2020-12-22 10:22:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2966 transitions. [2020-12-22 10:22:13,701 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2966 transitions. Word has length 46 [2020-12-22 10:22:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:13,701 INFO L481 AbstractCegarLoop]: Abstraction has 1648 states and 2966 transitions. [2020-12-22 10:22:13,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:22:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2966 transitions. [2020-12-22 10:22:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 10:22:13,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:13,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2020-12-22 10:22:13,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:22:13,712 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1810549064, now seen corresponding path program 1 times [2020-12-22 10:22:13,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:13,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291156513] [2020-12-22 10:22:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:13,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291156513] [2020-12-22 10:22:13,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:13,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:13,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067804277] [2020-12-22 10:22:13,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:22:13,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:13,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:22:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:22:13,993 INFO L87 Difference]: Start difference. First operand 1648 states and 2966 transitions. Second operand 4 states. [2020-12-22 10:22:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:24,674 INFO L93 Difference]: Finished difference Result 5405 states and 9856 transitions. [2020-12-22 10:22:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:22:24,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-12-22 10:22:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:24,700 INFO L225 Difference]: With dead ends: 5405 [2020-12-22 10:22:24,700 INFO L226 Difference]: Without dead ends: 3901 [2020-12-22 10:22:24,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 10:22:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2020-12-22 10:22:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 3901. [2020-12-22 10:22:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3901 states. [2020-12-22 10:22:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 6095 transitions. [2020-12-22 10:22:24,790 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 6095 transitions. Word has length 89 [2020-12-22 10:22:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:24,791 INFO L481 AbstractCegarLoop]: Abstraction has 3901 states and 6095 transitions. [2020-12-22 10:22:24,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:22:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 6095 transitions. [2020-12-22 10:22:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:22:24,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:24,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:24,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:22:24,793 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash -686299155, now seen corresponding path program 1 times [2020-12-22 10:22:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:24,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474604539] [2020-12-22 10:22:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:24,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474604539] [2020-12-22 10:22:24,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114455141] [2020-12-22 10:22:24,948 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 10:22:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:25,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 10:22:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:22:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:22:25,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:22:25,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 10:22:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544531371] [2020-12-22 10:22:25,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:22:25,343 INFO L87 Difference]: Start difference. First operand 3901 states and 6095 transitions. Second operand 3 states. [2020-12-22 10:22:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:31,685 INFO L93 Difference]: Finished difference Result 10662 states and 17147 transitions. [2020-12-22 10:22:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:31,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:22:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:31,725 INFO L225 Difference]: With dead ends: 10662 [2020-12-22 10:22:31,725 INFO L226 Difference]: Without dead ends: 6905 [2020-12-22 10:22:31,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:22:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2020-12-22 10:22:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 6905. [2020-12-22 10:22:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6905 states. [2020-12-22 10:22:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6905 states to 6905 states and 9819 transitions. [2020-12-22 10:22:31,873 INFO L78 Accepts]: Start accepts. Automaton has 6905 states and 9819 transitions. Word has length 91 [2020-12-22 10:22:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:31,874 INFO L481 AbstractCegarLoop]: Abstraction has 6905 states and 9819 transitions. [2020-12-22 10:22:31,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6905 states and 9819 transitions. [2020-12-22 10:22:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:31,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:31,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:32,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:22:32,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:32,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:32,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:22:32,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:32,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484515140] [2020-12-22 10:22:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:32,250 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 10:22:32,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484515140] [2020-12-22 10:22:32,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:32,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:32,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912039453] [2020-12-22 10:22:32,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:32,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:32,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:32,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:32,255 INFO L87 Difference]: Start difference. First operand 6905 states and 9819 transitions. Second operand 3 states. [2020-12-22 10:22:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:32,315 INFO L93 Difference]: Finished difference Result 7051 states and 10051 transitions. [2020-12-22 10:22:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:32,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:32,346 INFO L225 Difference]: With dead ends: 7051 [2020-12-22 10:22:32,346 INFO L226 Difference]: Without dead ends: 6975 [2020-12-22 10:22:32,349 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 10:22:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2020-12-22 10:22:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 6973. [2020-12-22 10:22:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6973 states. [2020-12-22 10:22:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6973 states to 6973 states and 9928 transitions. [2020-12-22 10:22:32,574 INFO L78 Accepts]: Start accepts. Automaton has 6973 states and 9928 transitions. Word has length 106 [2020-12-22 10:22:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:32,575 INFO L481 AbstractCegarLoop]: Abstraction has 6973 states and 9928 transitions. [2020-12-22 10:22:32,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6973 states and 9928 transitions. [2020-12-22 10:22:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:32,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:32,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:32,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:22:32,584 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:32,584 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:22:32,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:32,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041302987] [2020-12-22 10:22:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:32,739 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 10:22:32,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041302987] [2020-12-22 10:22:32,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:32,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:32,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239445786] [2020-12-22 10:22:32,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:32,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:32,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:32,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:32,742 INFO L87 Difference]: Start difference. First operand 6973 states and 9928 transitions. Second operand 3 states. [2020-12-22 10:22:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:32,806 INFO L93 Difference]: Finished difference Result 7249 states and 10368 transitions. [2020-12-22 10:22:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:32,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:32,842 INFO L225 Difference]: With dead ends: 7249 [2020-12-22 10:22:32,842 INFO L226 Difference]: Without dead ends: 7105 [2020-12-22 10:22:32,846 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 10:22:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7105 states. [2020-12-22 10:22:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7105 to 7103. [2020-12-22 10:22:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7103 states. [2020-12-22 10:22:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 10135 transitions. [2020-12-22 10:22:32,999 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 10135 transitions. Word has length 106 [2020-12-22 10:22:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:32,999 INFO L481 AbstractCegarLoop]: Abstraction has 7103 states and 10135 transitions. [2020-12-22 10:22:32,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 10135 transitions. [2020-12-22 10:22:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:33,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:33,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:33,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:22:33,002 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:22:33,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:33,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015443827] [2020-12-22 10:22:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:33,089 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 10:22:33,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015443827] [2020-12-22 10:22:33,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:33,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:33,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166206138] [2020-12-22 10:22:33,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:33,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:33,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:33,092 INFO L87 Difference]: Start difference. First operand 7103 states and 10135 transitions. Second operand 3 states. [2020-12-22 10:22:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:33,153 INFO L93 Difference]: Finished difference Result 7627 states and 10969 transitions. [2020-12-22 10:22:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:33,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:33,170 INFO L225 Difference]: With dead ends: 7627 [2020-12-22 10:22:33,170 INFO L226 Difference]: Without dead ends: 7353 [2020-12-22 10:22:33,174 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 10:22:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7353 states. [2020-12-22 10:22:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7353 to 7351. [2020-12-22 10:22:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7351 states. [2020-12-22 10:22:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 10527 transitions. [2020-12-22 10:22:33,304 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 10527 transitions. Word has length 106 [2020-12-22 10:22:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:33,304 INFO L481 AbstractCegarLoop]: Abstraction has 7351 states and 10527 transitions. [2020-12-22 10:22:33,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 10527 transitions. [2020-12-22 10:22:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:33,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:33,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:33,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:22:33,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:22:33,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:33,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090026078] [2020-12-22 10:22:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:33,395 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 10:22:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090026078] [2020-12-22 10:22:33,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:33,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:33,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631724349] [2020-12-22 10:22:33,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:33,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:33,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:33,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:33,397 INFO L87 Difference]: Start difference. First operand 7351 states and 10527 transitions. Second operand 3 states. [2020-12-22 10:22:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:33,472 INFO L93 Difference]: Finished difference Result 8347 states and 12105 transitions. [2020-12-22 10:22:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:33,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:22:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:33,490 INFO L225 Difference]: With dead ends: 8347 [2020-12-22 10:22:33,490 INFO L226 Difference]: Without dead ends: 7825 [2020-12-22 10:22:33,494 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 10:22:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2020-12-22 10:22:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7823. [2020-12-22 10:22:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7823 states. [2020-12-22 10:22:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 11267 transitions. [2020-12-22 10:22:33,647 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 11267 transitions. Word has length 106 [2020-12-22 10:22:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:33,648 INFO L481 AbstractCegarLoop]: Abstraction has 7823 states and 11267 transitions. [2020-12-22 10:22:33,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 11267 transitions. [2020-12-22 10:22:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:22:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:33,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:33,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:22:33,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:22:33,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:33,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143904184] [2020-12-22 10:22:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:33,849 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 10:22:33,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143904184] [2020-12-22 10:22:33,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:33,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:33,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663576980] [2020-12-22 10:22:33,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:33,854 INFO L87 Difference]: Start difference. First operand 7823 states and 11267 transitions. Second operand 10 states. [2020-12-22 10:22:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:35,059 INFO L93 Difference]: Finished difference Result 23727 states and 36371 transitions. [2020-12-22 10:22:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:22:35,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:22:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:35,111 INFO L225 Difference]: With dead ends: 23727 [2020-12-22 10:22:35,111 INFO L226 Difference]: Without dead ends: 22733 [2020-12-22 10:22:35,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:22:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22733 states. [2020-12-22 10:22:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22733 to 8815. [2020-12-22 10:22:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8815 states. [2020-12-22 10:22:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 12803 transitions. [2020-12-22 10:22:35,562 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 12803 transitions. Word has length 106 [2020-12-22 10:22:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:35,563 INFO L481 AbstractCegarLoop]: Abstraction has 8815 states and 12803 transitions. [2020-12-22 10:22:35,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 12803 transitions. [2020-12-22 10:22:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:35,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:35,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:35,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:22:35,566 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:35,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:35,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:22:35,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:35,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754207206] [2020-12-22 10:22:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:35,695 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 10:22:35,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754207206] [2020-12-22 10:22:35,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:35,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:35,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192664958] [2020-12-22 10:22:35,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:35,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:35,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:35,702 INFO L87 Difference]: Start difference. First operand 8815 states and 12803 transitions. Second operand 3 states. [2020-12-22 10:22:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:35,962 INFO L93 Difference]: Finished difference Result 11757 states and 17399 transitions. [2020-12-22 10:22:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:35,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:35,995 INFO L225 Difference]: With dead ends: 11757 [2020-12-22 10:22:35,995 INFO L226 Difference]: Without dead ends: 9771 [2020-12-22 10:22:36,002 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 10:22:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2020-12-22 10:22:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 9769. [2020-12-22 10:22:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9769 states. [2020-12-22 10:22:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9769 states to 9769 states and 14269 transitions. [2020-12-22 10:22:36,375 INFO L78 Accepts]: Start accepts. Automaton has 9769 states and 14269 transitions. Word has length 108 [2020-12-22 10:22:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:36,375 INFO L481 AbstractCegarLoop]: Abstraction has 9769 states and 14269 transitions. [2020-12-22 10:22:36,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 9769 states and 14269 transitions. [2020-12-22 10:22:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:36,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:36,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:36,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:22:36,378 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:22:36,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:36,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147622340] [2020-12-22 10:22:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:36,807 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 10:22:36,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147622340] [2020-12-22 10:22:36,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:36,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:36,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182635199] [2020-12-22 10:22:36,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:36,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:36,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:36,809 INFO L87 Difference]: Start difference. First operand 9769 states and 14269 transitions. Second operand 10 states. [2020-12-22 10:22:37,325 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 10:22:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:37,732 INFO L93 Difference]: Finished difference Result 12709 states and 18839 transitions. [2020-12-22 10:22:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:37,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:22:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:37,755 INFO L225 Difference]: With dead ends: 12709 [2020-12-22 10:22:37,756 INFO L226 Difference]: Without dead ends: 9771 [2020-12-22 10:22:37,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:22:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9771 states. [2020-12-22 10:22:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9771 to 9769. [2020-12-22 10:22:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9769 states. [2020-12-22 10:22:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9769 states to 9769 states and 14245 transitions. [2020-12-22 10:22:38,076 INFO L78 Accepts]: Start accepts. Automaton has 9769 states and 14245 transitions. Word has length 108 [2020-12-22 10:22:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:38,077 INFO L481 AbstractCegarLoop]: Abstraction has 9769 states and 14245 transitions. [2020-12-22 10:22:38,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 9769 states and 14245 transitions. [2020-12-22 10:22:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:38,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:38,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:38,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:22:38,079 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:38,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:38,080 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:22:38,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:38,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185980707] [2020-12-22 10:22:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:38,271 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 10:22:38,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185980707] [2020-12-22 10:22:38,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:38,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:38,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808009318] [2020-12-22 10:22:38,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:38,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:38,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:38,274 INFO L87 Difference]: Start difference. First operand 9769 states and 14245 transitions. Second operand 3 states. [2020-12-22 10:22:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:38,655 INFO L93 Difference]: Finished difference Result 15357 states and 22855 transitions. [2020-12-22 10:22:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:38,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:38,688 INFO L225 Difference]: With dead ends: 15357 [2020-12-22 10:22:38,688 INFO L226 Difference]: Without dead ends: 12419 [2020-12-22 10:22:38,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12419 states. [2020-12-22 10:22:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12419 to 12417. [2020-12-22 10:22:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12417 states. [2020-12-22 10:22:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12417 states to 12417 states and 18261 transitions. [2020-12-22 10:22:39,218 INFO L78 Accepts]: Start accepts. Automaton has 12417 states and 18261 transitions. Word has length 108 [2020-12-22 10:22:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:39,218 INFO L481 AbstractCegarLoop]: Abstraction has 12417 states and 18261 transitions. [2020-12-22 10:22:39,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 12417 states and 18261 transitions. [2020-12-22 10:22:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:39,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:39,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:39,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:22:39,220 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:22:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:39,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837301878] [2020-12-22 10:22:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:39,300 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 10:22:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837301878] [2020-12-22 10:22:39,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:39,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:39,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77290754] [2020-12-22 10:22:39,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:39,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:39,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:39,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:39,303 INFO L87 Difference]: Start difference. First operand 12417 states and 18261 transitions. Second operand 3 states. [2020-12-22 10:22:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:40,014 INFO L93 Difference]: Finished difference Result 23013 states and 34423 transitions. [2020-12-22 10:22:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:40,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:40,047 INFO L225 Difference]: With dead ends: 23013 [2020-12-22 10:22:40,047 INFO L226 Difference]: Without dead ends: 17427 [2020-12-22 10:22:40,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17427 states. [2020-12-22 10:22:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17427 to 17425. [2020-12-22 10:22:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17425 states. [2020-12-22 10:22:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17425 states to 17425 states and 25765 transitions. [2020-12-22 10:22:41,048 INFO L78 Accepts]: Start accepts. Automaton has 17425 states and 25765 transitions. Word has length 108 [2020-12-22 10:22:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:41,048 INFO L481 AbstractCegarLoop]: Abstraction has 17425 states and 25765 transitions. [2020-12-22 10:22:41,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17425 states and 25765 transitions. [2020-12-22 10:22:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:41,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:41,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:41,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:22:41,051 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:22:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:41,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526081327] [2020-12-22 10:22:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:41,126 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 10:22:41,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526081327] [2020-12-22 10:22:41,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:41,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:41,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394430623] [2020-12-22 10:22:41,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:41,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:41,129 INFO L87 Difference]: Start difference. First operand 17425 states and 25765 transitions. Second operand 3 states. [2020-12-22 10:22:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:42,275 INFO L93 Difference]: Finished difference Result 37461 states and 55975 transitions. [2020-12-22 10:22:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:42,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:42,323 INFO L225 Difference]: With dead ends: 37461 [2020-12-22 10:22:42,323 INFO L226 Difference]: Without dead ends: 26867 [2020-12-22 10:22:42,343 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 10:22:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26867 states. [2020-12-22 10:22:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26867 to 26865. [2020-12-22 10:22:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26865 states. [2020-12-22 10:22:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26865 states to 26865 states and 39717 transitions. [2020-12-22 10:22:43,977 INFO L78 Accepts]: Start accepts. Automaton has 26865 states and 39717 transitions. Word has length 108 [2020-12-22 10:22:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:43,978 INFO L481 AbstractCegarLoop]: Abstraction has 26865 states and 39717 transitions. [2020-12-22 10:22:43,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 26865 states and 39717 transitions. [2020-12-22 10:22:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:22:43,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:43,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:43,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:22:43,980 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:22:43,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:43,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504340859] [2020-12-22 10:22:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:44,057 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 10:22:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504340859] [2020-12-22 10:22:44,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:44,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:44,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496445642] [2020-12-22 10:22:44,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:44,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:44,060 INFO L87 Difference]: Start difference. First operand 26865 states and 39717 transitions. Second operand 3 states. [2020-12-22 10:22:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:46,176 INFO L93 Difference]: Finished difference Result 64629 states and 95911 transitions. [2020-12-22 10:22:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:22:46,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:22:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:46,237 INFO L225 Difference]: With dead ends: 64629 [2020-12-22 10:22:46,237 INFO L226 Difference]: Without dead ends: 44595 [2020-12-22 10:22:46,266 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 10:22:46,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44595 states. [2020-12-22 10:22:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44595 to 44593. [2020-12-22 10:22:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44593 states. [2020-12-22 10:22:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44593 states to 44593 states and 65509 transitions. [2020-12-22 10:22:49,008 INFO L78 Accepts]: Start accepts. Automaton has 44593 states and 65509 transitions. Word has length 108 [2020-12-22 10:22:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:49,008 INFO L481 AbstractCegarLoop]: Abstraction has 44593 states and 65509 transitions. [2020-12-22 10:22:49,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:22:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 44593 states and 65509 transitions. [2020-12-22 10:22:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:22:49,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:49,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:22:49,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:22:49,011 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:22:49,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:49,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117813096] [2020-12-22 10:22:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:49,265 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 10:22:49,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117813096] [2020-12-22 10:22:49,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:49,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:22:49,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227356960] [2020-12-22 10:22:49,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:22:49,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:49,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:22:49,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:22:49,267 INFO L87 Difference]: Start difference. First operand 44593 states and 65509 transitions. Second operand 8 states. [2020-12-22 10:22:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:53,678 INFO L93 Difference]: Finished difference Result 76760 states and 112086 transitions. [2020-12-22 10:22:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:53,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:22:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:53,768 INFO L225 Difference]: With dead ends: 76760 [2020-12-22 10:22:53,768 INFO L226 Difference]: Without dead ends: 76758 [2020-12-22 10:22:53,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:22:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76758 states. [2020-12-22 10:22:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76758 to 46129. [2020-12-22 10:22:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46129 states. [2020-12-22 10:22:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46129 states to 46129 states and 66917 transitions. [2020-12-22 10:22:57,235 INFO L78 Accepts]: Start accepts. Automaton has 46129 states and 66917 transitions. Word has length 109 [2020-12-22 10:22:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:57,236 INFO L481 AbstractCegarLoop]: Abstraction has 46129 states and 66917 transitions. [2020-12-22 10:22:57,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:22:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 46129 states and 66917 transitions. [2020-12-22 10:22:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:22:57,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:57,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:57,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:22:57,268 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:57,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:22:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:57,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862794877] [2020-12-22 10:22:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:22:57,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862794877] [2020-12-22 10:22:57,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:57,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806219811] [2020-12-22 10:22:57,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:57,509 INFO L87 Difference]: Start difference. First operand 46129 states and 66917 transitions. Second operand 10 states. [2020-12-22 10:23:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:17,077 INFO L93 Difference]: Finished difference Result 368067 states and 535214 transitions. [2020-12-22 10:23:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:17,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:17,738 INFO L225 Difference]: With dead ends: 368067 [2020-12-22 10:23:17,738 INFO L226 Difference]: Without dead ends: 328769 [2020-12-22 10:23:17,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328769 states. [2020-12-22 10:23:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328769 to 85425. [2020-12-22 10:23:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85425 states. [2020-12-22 10:23:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85425 states to 85425 states and 123749 transitions. [2020-12-22 10:23:25,418 INFO L78 Accepts]: Start accepts. Automaton has 85425 states and 123749 transitions. Word has length 149 [2020-12-22 10:23:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:23:25,418 INFO L481 AbstractCegarLoop]: Abstraction has 85425 states and 123749 transitions. [2020-12-22 10:23:25,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:23:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 85425 states and 123749 transitions. [2020-12-22 10:23:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:23:25,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:23:25,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:23:25,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:23:25,454 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:23:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:23:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:23:25,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:23:25,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60844388] [2020-12-22 10:23:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:23:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:23:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:23:25,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60844388] [2020-12-22 10:23:25,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:23:25,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:23:25,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217922883] [2020-12-22 10:23:25,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:23:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:23:25,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:23:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:23:25,713 INFO L87 Difference]: Start difference. First operand 85425 states and 123749 transitions. Second operand 10 states. [2020-12-22 10:23:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:49,288 INFO L93 Difference]: Finished difference Result 407363 states and 592046 transitions. [2020-12-22 10:23:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:49,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:23:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:49,898 INFO L225 Difference]: With dead ends: 407363 [2020-12-22 10:23:49,899 INFO L226 Difference]: Without dead ends: 368065 [2020-12-22 10:23:50,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368065 states. [2020-12-22 10:24:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368065 to 144433. [2020-12-22 10:24:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144433 states. [2020-12-22 10:24:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144433 states to 144433 states and 208677 transitions. [2020-12-22 10:24:02,721 INFO L78 Accepts]: Start accepts. Automaton has 144433 states and 208677 transitions. Word has length 149 [2020-12-22 10:24:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:02,722 INFO L481 AbstractCegarLoop]: Abstraction has 144433 states and 208677 transitions. [2020-12-22 10:24:02,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 144433 states and 208677 transitions. [2020-12-22 10:24:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:24:02,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:02,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:02,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:24:02,752 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:24:02,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:02,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82644578] [2020-12-22 10:24:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:24:02,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82644578] [2020-12-22 10:24:02,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:02,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:02,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35976462] [2020-12-22 10:24:02,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:02,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:02,949 INFO L87 Difference]: Start difference. First operand 144433 states and 208677 transitions. Second operand 10 states. [2020-12-22 10:24:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:24:31,724 INFO L93 Difference]: Finished difference Result 446659 states and 648878 transitions. [2020-12-22 10:24:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:24:31,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:24:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:24:32,565 INFO L225 Difference]: With dead ends: 446659 [2020-12-22 10:24:32,565 INFO L226 Difference]: Without dead ends: 407361 [2020-12-22 10:24:32,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:24:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407361 states. [2020-12-22 10:24:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407361 to 183729. [2020-12-22 10:24:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183729 states. [2020-12-22 10:24:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183729 states to 183729 states and 265509 transitions. [2020-12-22 10:24:49,348 INFO L78 Accepts]: Start accepts. Automaton has 183729 states and 265509 transitions. Word has length 149 [2020-12-22 10:24:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:24:49,349 INFO L481 AbstractCegarLoop]: Abstraction has 183729 states and 265509 transitions. [2020-12-22 10:24:49,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:24:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 183729 states and 265509 transitions. [2020-12-22 10:24:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:24:49,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:24:49,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:24:49,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:24:49,376 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:24:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:24:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash -928927789, now seen corresponding path program 1 times [2020-12-22 10:24:49,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:24:49,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190241602] [2020-12-22 10:24:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:24:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:24:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:24:49,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190241602] [2020-12-22 10:24:49,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:24:49,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:24:49,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438565789] [2020-12-22 10:24:49,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:24:49,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:24:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:24:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:24:49,628 INFO L87 Difference]: Start difference. First operand 183729 states and 265509 transitions. Second operand 10 states. [2020-12-22 10:25:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:25:24,736 INFO L93 Difference]: Finished difference Result 485955 states and 705710 transitions. [2020-12-22 10:25:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:25:24,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:25:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:25:25,662 INFO L225 Difference]: With dead ends: 485955 [2020-12-22 10:25:25,662 INFO L226 Difference]: Without dead ends: 446657 [2020-12-22 10:25:25,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:25:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446657 states. [2020-12-22 10:25:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446657 to 223025. [2020-12-22 10:25:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223025 states.