/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.4.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:48:58,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:48:58,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:48:58,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:48:58,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:48:58,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:48:58,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:48:58,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:48:58,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:48:58,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:48:58,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:48:58,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:48:58,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:48:58,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:48:58,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:48:58,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:48:58,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:48:58,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:48:58,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:48:58,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:48:58,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:48:58,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:48:58,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:48:58,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:48:58,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:48:58,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:48:58,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:48:58,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:48:58,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:48:58,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:48:58,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:48:58,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:48:58,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:48:58,895 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:48:58,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:48:58,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:48:58,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:48:58,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:48:58,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:48:58,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:48:58,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:48:58,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:48:58,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:48:58,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:48:58,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:48:58,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:48:58,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:58,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:48:58,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:48:58,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:48:58,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:48:58,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:48:58,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:48:58,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:48:58,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:48:59,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:48:59,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:48:59,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:48:59,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:48:59,513 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:48:59,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:48:59,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d13560723/24c6863ef14c42dc89524e8ba8276e9f/FLAG8ba51f5dc [2020-12-22 09:49:01,006 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:49:01,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:49:01,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d13560723/24c6863ef14c42dc89524e8ba8276e9f/FLAG8ba51f5dc [2020-12-22 09:49:01,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d13560723/24c6863ef14c42dc89524e8ba8276e9f [2020-12-22 09:49:01,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:49:01,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:49:01,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:01,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:49:01,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:49:01,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:01" (1/1) ... [2020-12-22 09:49:01,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77577213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:01, skipping insertion in model container [2020-12-22 09:49:01,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:01" (1/1) ... [2020-12-22 09:49:01,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:49:01,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:49:02,081 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.4.ufo.UNBOUNDED.pals+Problem12_label09.c[8784,8797] [2020-12-22 09:49:02,177 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.4.ufo.UNBOUNDED.pals+Problem12_label09.c[16289,16302] [2020-12-22 09:49:03,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:03,382 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:49:03,421 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.4.ufo.UNBOUNDED.pals+Problem12_label09.c[8784,8797] [2020-12-22 09:49:03,532 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.4.ufo.UNBOUNDED.pals+Problem12_label09.c[16289,16302] [2020-12-22 09:49:04,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:04,254 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:49:04,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04 WrapperNode [2020-12-22 09:49:04,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:04,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:04,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:49:04,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:49:04,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:04,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:04,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:04,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:49:04,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:49:04,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:49:04,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:04,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:05,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:05,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:05,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:05,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:05,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (1/1) ... [2020-12-22 09:49:05,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:49:05,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:49:05,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:49:05,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:49:05,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (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 09:49:05,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:49:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:49:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:49:05,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:49:11,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:49:11,077 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:49:11,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:49:11 BoogieIcfgContainer [2020-12-22 09:49:11,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:49:11,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:49:11,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:49:11,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:49:11,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:49:01" (1/3) ... [2020-12-22 09:49:11,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60260869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:49:11, skipping insertion in model container [2020-12-22 09:49:11,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:04" (2/3) ... [2020-12-22 09:49:11,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60260869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:49:11, skipping insertion in model container [2020-12-22 09:49:11,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:49:11" (3/3) ... [2020-12-22 09:49:11,091 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:49:11,098 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:49:11,104 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:49:11,125 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:49:11,161 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:49:11,161 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:49:11,161 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:49:11,161 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:49:11,161 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:49:11,162 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:49:11,162 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:49:11,162 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:49:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:49:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:49:11,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:11,207 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] [2020-12-22 09:49:11,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:11,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:49:11,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:11,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365523126] [2020-12-22 09:49:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:11,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365523126] [2020-12-22 09:49:11,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:11,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:49:11,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403100957] [2020-12-22 09:49:11,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:49:11,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:11,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:49:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:49:11,547 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:49:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:11,638 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:49:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:49:11,639 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:49:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:11,669 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:49:11,669 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:49:11,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:49:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:49:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:49:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:49:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:49:11,828 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:49:11,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:11,828 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:49:11,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:49:11,829 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:49:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:49:11,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:11,832 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] [2020-12-22 09:49:11,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:49:11,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:49:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:11,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467344958] [2020-12-22 09:49:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:11,979 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 09:49:11,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467344958] [2020-12-22 09:49:11,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:11,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:11,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700293516] [2020-12-22 09:49:11,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:49:11,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:49:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:49:11,983 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:49:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,133 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:49:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:49:12,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:49:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,140 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:49:12,140 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:49:12,142 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 09:49:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:49:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:49:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:49:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:49:12,167 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:49:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,167 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:49:12,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:49:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:49:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:49:12,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:49:12,171 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:49:12,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076011740] [2020-12-22 09:49:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,337 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 09:49:12,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076011740] [2020-12-22 09:49:12,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:12,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362568408] [2020-12-22 09:49:12,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:12,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:12,344 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 6 states. [2020-12-22 09:49:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,593 INFO L93 Difference]: Finished difference Result 1188 states and 2107 transitions. [2020-12-22 09:49:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:49:12,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:49:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,606 INFO L225 Difference]: With dead ends: 1188 [2020-12-22 09:49:12,607 INFO L226 Difference]: Without dead ends: 1143 [2020-12-22 09:49:12,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:49:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-12-22 09:49:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 871. [2020-12-22 09:49:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-12-22 09:49:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1607 transitions. [2020-12-22 09:49:12,655 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1607 transitions. Word has length 52 [2020-12-22 09:49:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,656 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1607 transitions. [2020-12-22 09:49:12,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1607 transitions. [2020-12-22 09:49:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:12,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:49:12,664 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:49:12,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789034112] [2020-12-22 09:49:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:12,796 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 09:49:12,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789034112] [2020-12-22 09:49:12,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:12,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39275788] [2020-12-22 09:49:12,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:12,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:12,799 INFO L87 Difference]: Start difference. First operand 871 states and 1607 transitions. Second operand 3 states. [2020-12-22 09:49:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:12,853 INFO L93 Difference]: Finished difference Result 1036 states and 1866 transitions. [2020-12-22 09:49:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:12,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:12,859 INFO L225 Difference]: With dead ends: 1036 [2020-12-22 09:49:12,859 INFO L226 Difference]: Without dead ends: 948 [2020-12-22 09:49:12,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-12-22 09:49:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 944. [2020-12-22 09:49:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:49:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1719 transitions. [2020-12-22 09:49:12,888 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1719 transitions. Word has length 54 [2020-12-22 09:49:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:12,889 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1719 transitions. [2020-12-22 09:49:12,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1719 transitions. [2020-12-22 09:49:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:12,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:12,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:12,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:49:12,891 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:12,891 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:49:12,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:12,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029838366] [2020-12-22 09:49:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,080 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 09:49:13,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029838366] [2020-12-22 09:49:13,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:13,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680036358] [2020-12-22 09:49:13,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:13,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:13,083 INFO L87 Difference]: Start difference. First operand 944 states and 1719 transitions. Second operand 6 states. [2020-12-22 09:49:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,245 INFO L93 Difference]: Finished difference Result 1107 states and 1971 transitions. [2020-12-22 09:49:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:13,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:49:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,252 INFO L225 Difference]: With dead ends: 1107 [2020-12-22 09:49:13,253 INFO L226 Difference]: Without dead ends: 946 [2020-12-22 09:49:13,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:49:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-12-22 09:49:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2020-12-22 09:49:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:49:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1717 transitions. [2020-12-22 09:49:13,284 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1717 transitions. Word has length 54 [2020-12-22 09:49:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,284 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1717 transitions. [2020-12-22 09:49:13,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1717 transitions. [2020-12-22 09:49:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:13,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:13,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:49:13,286 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:49:13,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679838707] [2020-12-22 09:49:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,353 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 09:49:13,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679838707] [2020-12-22 09:49:13,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:13,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201390528] [2020-12-22 09:49:13,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:13,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:13,359 INFO L87 Difference]: Start difference. First operand 944 states and 1717 transitions. Second operand 3 states. [2020-12-22 09:49:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,415 INFO L93 Difference]: Finished difference Result 1242 states and 2175 transitions. [2020-12-22 09:49:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:13,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,422 INFO L225 Difference]: With dead ends: 1242 [2020-12-22 09:49:13,422 INFO L226 Difference]: Without dead ends: 1081 [2020-12-22 09:49:13,423 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 09:49:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-12-22 09:49:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2020-12-22 09:49:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-12-22 09:49:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1921 transitions. [2020-12-22 09:49:13,458 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1921 transitions. Word has length 54 [2020-12-22 09:49:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,458 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1921 transitions. [2020-12-22 09:49:13,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1921 transitions. [2020-12-22 09:49:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:13,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:13,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:49:13,460 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:49:13,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073170267] [2020-12-22 09:49:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,532 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 09:49:13,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073170267] [2020-12-22 09:49:13,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661556508] [2020-12-22 09:49:13,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:13,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:13,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:13,546 INFO L87 Difference]: Start difference. First operand 1079 states and 1921 transitions. Second operand 3 states. [2020-12-22 09:49:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,607 INFO L93 Difference]: Finished difference Result 1623 states and 2747 transitions. [2020-12-22 09:49:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:13,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,616 INFO L225 Difference]: With dead ends: 1623 [2020-12-22 09:49:13,616 INFO L226 Difference]: Without dead ends: 1327 [2020-12-22 09:49:13,618 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 09:49:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2020-12-22 09:49:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2020-12-22 09:49:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-12-22 09:49:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2285 transitions. [2020-12-22 09:49:13,670 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2285 transitions. Word has length 54 [2020-12-22 09:49:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,671 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2285 transitions. [2020-12-22 09:49:13,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2285 transitions. [2020-12-22 09:49:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:49:13,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:13,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:49:13,672 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:49:13,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162800443] [2020-12-22 09:49:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,764 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 09:49:13,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162800443] [2020-12-22 09:49:13,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937502201] [2020-12-22 09:49:13,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:13,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:13,767 INFO L87 Difference]: Start difference. First operand 1325 states and 2285 transitions. Second operand 3 states. [2020-12-22 09:49:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,839 INFO L93 Difference]: Finished difference Result 2313 states and 3759 transitions. [2020-12-22 09:49:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:13,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:49:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,851 INFO L225 Difference]: With dead ends: 2313 [2020-12-22 09:49:13,851 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:49:13,853 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 09:49:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:49:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2020-12-22 09:49:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-12-22 09:49:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2925 transitions. [2020-12-22 09:49:13,940 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2925 transitions. Word has length 54 [2020-12-22 09:49:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,941 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 2925 transitions. [2020-12-22 09:49:13,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2925 transitions. [2020-12-22 09:49:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:49:13,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:13,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:49:13,943 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:49:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710793824] [2020-12-22 09:49:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:14,047 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 09:49:14,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710793824] [2020-12-22 09:49:14,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:14,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:14,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456632998] [2020-12-22 09:49:14,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:49:14,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:14,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:49:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:49:14,050 INFO L87 Difference]: Start difference. First operand 1769 states and 2925 transitions. Second operand 5 states. [2020-12-22 09:49:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:14,286 INFO L93 Difference]: Finished difference Result 2523 states and 4010 transitions. [2020-12-22 09:49:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:49:14,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:49:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:14,304 INFO L225 Difference]: With dead ends: 2523 [2020-12-22 09:49:14,304 INFO L226 Difference]: Without dead ends: 2521 [2020-12-22 09:49:14,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:49:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2020-12-22 09:49:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1817. [2020-12-22 09:49:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-12-22 09:49:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2965 transitions. [2020-12-22 09:49:14,431 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2965 transitions. Word has length 55 [2020-12-22 09:49:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:14,432 INFO L481 AbstractCegarLoop]: Abstraction has 1817 states and 2965 transitions. [2020-12-22 09:49:14,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:49:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2965 transitions. [2020-12-22 09:49:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:49:14,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:14,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:49:14,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:49:14,434 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:14,435 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:49:14,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:14,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587067978] [2020-12-22 09:49:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:14,493 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 09:49:14,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587067978] [2020-12-22 09:49:14,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:14,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009093428] [2020-12-22 09:49:14,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:14,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:14,497 INFO L87 Difference]: Start difference. First operand 1817 states and 2965 transitions. Second operand 3 states. [2020-12-22 09:49:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:14,619 INFO L93 Difference]: Finished difference Result 2880 states and 4523 transitions. [2020-12-22 09:49:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:14,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:49:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:14,634 INFO L225 Difference]: With dead ends: 2880 [2020-12-22 09:49:14,635 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 09:49:14,637 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 09:49:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 09:49:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 09:49:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:49:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3623 transitions. [2020-12-22 09:49:14,789 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3623 transitions. Word has length 56 [2020-12-22 09:49:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:14,789 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3623 transitions. [2020-12-22 09:49:14,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3623 transitions. [2020-12-22 09:49:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:49:14,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:14,791 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] [2020-12-22 09:49:14,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:49:14,791 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash -241975758, now seen corresponding path program 1 times [2020-12-22 09:49:14,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:14,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032260957] [2020-12-22 09:49:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:14,935 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 09:49:14,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032260957] [2020-12-22 09:49:14,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:14,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:14,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415978225] [2020-12-22 09:49:14,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:49:14,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:14,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:49:14,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:49:14,939 INFO L87 Difference]: Start difference. First operand 2283 states and 3623 transitions. Second operand 4 states. [2020-12-22 09:49:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:25,373 INFO L93 Difference]: Finished difference Result 4538 states and 7932 transitions. [2020-12-22 09:49:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:49:25,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:49:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:25,397 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:49:25,397 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:49:25,400 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 09:49:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:49:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:49:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:49:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5737 transitions. [2020-12-22 09:49:25,582 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5737 transitions. Word has length 67 [2020-12-22 09:49:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:25,583 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5737 transitions. [2020-12-22 09:49:25,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:49:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5737 transitions. [2020-12-22 09:49:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:25,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:25,592 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:25,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:49:25,593 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:49:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:25,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821989994] [2020-12-22 09:49:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:49:25,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821989994] [2020-12-22 09:49:25,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:25,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:25,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655664614] [2020-12-22 09:49:25,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:25,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:25,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:25,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:25,780 INFO L87 Difference]: Start difference. First operand 3785 states and 5737 transitions. Second operand 6 states. [2020-12-22 09:49:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:26,327 INFO L93 Difference]: Finished difference Result 10091 states and 14778 transitions. [2020-12-22 09:49:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:26,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:26,393 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:49:26,393 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:49:26,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:49:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:49:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:49:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7865 transitions. [2020-12-22 09:49:26,743 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7865 transitions. Word has length 78 [2020-12-22 09:49:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:26,743 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7865 transitions. [2020-12-22 09:49:26,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7865 transitions. [2020-12-22 09:49:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:26,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:26,746 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:26,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:49:26,746 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:26,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:49:26,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:26,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146018965] [2020-12-22 09:49:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:49:26,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146018965] [2020-12-22 09:49:26,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:26,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976973887] [2020-12-22 09:49:26,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:26,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:26,855 INFO L87 Difference]: Start difference. First operand 5281 states and 7865 transitions. Second operand 6 states. [2020-12-22 09:49:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:27,470 INFO L93 Difference]: Finished difference Result 11587 states and 16906 transitions. [2020-12-22 09:49:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:27,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:27,495 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:49:27,495 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:49:27,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:49:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:49:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:49:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11037 transitions. [2020-12-22 09:49:28,136 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11037 transitions. Word has length 78 [2020-12-22 09:49:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:28,137 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 11037 transitions. [2020-12-22 09:49:28,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11037 transitions. [2020-12-22 09:49:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:49:28,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:28,141 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:28,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:49:28,141 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:49:28,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:28,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634400268] [2020-12-22 09:49:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:49:28,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634400268] [2020-12-22 09:49:28,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:28,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:28,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163210068] [2020-12-22 09:49:28,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:28,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:28,270 INFO L87 Difference]: Start difference. First operand 7529 states and 11037 transitions. Second operand 6 states. [2020-12-22 09:49:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:29,045 INFO L93 Difference]: Finished difference Result 13083 states and 19034 transitions. [2020-12-22 09:49:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:29,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:49:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:29,075 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:49:29,075 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:49:29,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:49:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:49:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:49:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13165 transitions. [2020-12-22 09:49:29,659 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13165 transitions. Word has length 78 [2020-12-22 09:49:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:29,659 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 13165 transitions. [2020-12-22 09:49:29,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13165 transitions. [2020-12-22 09:49:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:49:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:29,663 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:29,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:49:29,664 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:49:29,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:29,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872566008] [2020-12-22 09:49:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:29,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872566008] [2020-12-22 09:49:29,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:29,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:29,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353809585] [2020-12-22 09:49:29,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:29,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:29,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:29,737 INFO L87 Difference]: Start difference. First operand 9025 states and 13165 transitions. Second operand 3 states. [2020-12-22 09:49:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:30,143 INFO L93 Difference]: Finished difference Result 13806 states and 20037 transitions. [2020-12-22 09:49:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:30,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:49:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:30,163 INFO L225 Difference]: With dead ends: 13806 [2020-12-22 09:49:30,163 INFO L226 Difference]: Without dead ends: 7068 [2020-12-22 09:49:30,174 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 09:49:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-12-22 09:49:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 7066. [2020-12-22 09:49:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-12-22 09:49:30,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10382 transitions. [2020-12-22 09:49:30,608 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10382 transitions. Word has length 80 [2020-12-22 09:49:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:30,608 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 10382 transitions. [2020-12-22 09:49:30,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:30,608 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10382 transitions. [2020-12-22 09:49:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:49:30,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:30,612 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:30,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:49:30,612 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:49:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:30,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700034750] [2020-12-22 09:49:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:49:30,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700034750] [2020-12-22 09:49:30,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:30,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:49:30,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747525629] [2020-12-22 09:49:30,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:30,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:30,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:30,712 INFO L87 Difference]: Start difference. First operand 7066 states and 10382 transitions. Second operand 6 states. [2020-12-22 09:49:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:31,389 INFO L93 Difference]: Finished difference Result 11300 states and 16467 transitions. [2020-12-22 09:49:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:31,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:49:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:31,415 INFO L225 Difference]: With dead ends: 11300 [2020-12-22 09:49:31,416 INFO L226 Difference]: Without dead ends: 10242 [2020-12-22 09:49:31,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2020-12-22 09:49:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8122. [2020-12-22 09:49:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2020-12-22 09:49:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 11886 transitions. [2020-12-22 09:49:32,071 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 11886 transitions. Word has length 80 [2020-12-22 09:49:32,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:32,072 INFO L481 AbstractCegarLoop]: Abstraction has 8122 states and 11886 transitions. [2020-12-22 09:49:32,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 11886 transitions. [2020-12-22 09:49:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:32,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:32,075 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:32,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:49:32,075 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:32,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:49:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:32,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372672082] [2020-12-22 09:49:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:32,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372672082] [2020-12-22 09:49:32,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:32,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:32,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812905451] [2020-12-22 09:49:32,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:32,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:32,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:32,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:32,134 INFO L87 Difference]: Start difference. First operand 8122 states and 11886 transitions. Second operand 3 states. [2020-12-22 09:49:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:32,371 INFO L93 Difference]: Finished difference Result 11030 states and 16024 transitions. [2020-12-22 09:49:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:32,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:32,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:32,382 INFO L225 Difference]: With dead ends: 11030 [2020-12-22 09:49:32,382 INFO L226 Difference]: Without dead ends: 5220 [2020-12-22 09:49:32,391 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 09:49:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2020-12-22 09:49:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5218. [2020-12-22 09:49:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2020-12-22 09:49:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7706 transitions. [2020-12-22 09:49:32,637 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7706 transitions. Word has length 81 [2020-12-22 09:49:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:32,637 INFO L481 AbstractCegarLoop]: Abstraction has 5218 states and 7706 transitions. [2020-12-22 09:49:32,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7706 transitions. [2020-12-22 09:49:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:32,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:32,639 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:32,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:49:32,640 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:32,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:49:32,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:32,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817187222] [2020-12-22 09:49:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:32,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817187222] [2020-12-22 09:49:32,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:32,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:32,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410537597] [2020-12-22 09:49:32,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:32,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:32,696 INFO L87 Difference]: Start difference. First operand 5218 states and 7706 transitions. Second operand 3 states. [2020-12-22 09:49:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:32,823 INFO L93 Difference]: Finished difference Result 6674 states and 9754 transitions. [2020-12-22 09:49:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:32,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:32,832 INFO L225 Difference]: With dead ends: 6674 [2020-12-22 09:49:32,832 INFO L226 Difference]: Without dead ends: 3768 [2020-12-22 09:49:32,838 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 09:49:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-12-22 09:49:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2020-12-22 09:49:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-12-22 09:49:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5638 transitions. [2020-12-22 09:49:32,990 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5638 transitions. Word has length 81 [2020-12-22 09:49:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:32,990 INFO L481 AbstractCegarLoop]: Abstraction has 3766 states and 5638 transitions. [2020-12-22 09:49:32,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5638 transitions. [2020-12-22 09:49:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:32,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:32,993 INFO L422 BasicCegarLoop]: trace histogram [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 09:49:32,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:49:32,993 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:32,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:49:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:32,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70638854] [2020-12-22 09:49:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:33,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70638854] [2020-12-22 09:49:33,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:33,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:33,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558259127] [2020-12-22 09:49:33,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:49:33,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:49:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:49:33,055 INFO L87 Difference]: Start difference. First operand 3766 states and 5638 transitions. Second operand 3 states. [2020-12-22 09:49:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:33,133 INFO L93 Difference]: Finished difference Result 4496 states and 6652 transitions. [2020-12-22 09:49:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:49:33,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:49:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:33,140 INFO L225 Difference]: With dead ends: 4496 [2020-12-22 09:49:33,140 INFO L226 Difference]: Without dead ends: 3042 [2020-12-22 09:49:33,143 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 09:49:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-12-22 09:49:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2020-12-22 09:49:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3040 states. [2020-12-22 09:49:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4615 transitions. [2020-12-22 09:49:33,236 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4615 transitions. Word has length 81 [2020-12-22 09:49:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:33,237 INFO L481 AbstractCegarLoop]: Abstraction has 3040 states and 4615 transitions. [2020-12-22 09:49:33,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:49:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4615 transitions. [2020-12-22 09:49:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:49:33,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:33,238 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:33,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:49:33,239 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:49:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:33,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324515702] [2020-12-22 09:49:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:33,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324515702] [2020-12-22 09:49:33,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473443528] [2020-12-22 09:49:33,495 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 09:49:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:49:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:49:34,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:34,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:49:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399125161] [2020-12-22 09:49:34,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:49:34,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:49:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:49:34,189 INFO L87 Difference]: Start difference. First operand 3040 states and 4615 transitions. Second operand 12 states. [2020-12-22 09:49:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:35,877 INFO L93 Difference]: Finished difference Result 6473 states and 9264 transitions. [2020-12-22 09:49:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:49:35,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:49:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:35,890 INFO L225 Difference]: With dead ends: 6473 [2020-12-22 09:49:35,890 INFO L226 Difference]: Without dead ends: 5745 [2020-12-22 09:49:35,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:49:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2020-12-22 09:49:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4832. [2020-12-22 09:49:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2020-12-22 09:49:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6904 transitions. [2020-12-22 09:49:36,295 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6904 transitions. Word has length 81 [2020-12-22 09:49:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:36,296 INFO L481 AbstractCegarLoop]: Abstraction has 4832 states and 6904 transitions. [2020-12-22 09:49:36,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:49:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6904 transitions. [2020-12-22 09:49:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:36,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:36,297 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:36,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:36,512 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:49:36,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:36,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987069927] [2020-12-22 09:49:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:36,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987069927] [2020-12-22 09:49:36,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771311665] [2020-12-22 09:49:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:49:36,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:37,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:37,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:37,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:37,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866785464] [2020-12-22 09:49:37,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:37,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:37,476 INFO L87 Difference]: Start difference. First operand 4832 states and 6904 transitions. Second operand 17 states. [2020-12-22 09:49:39,656 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:40,892 INFO L93 Difference]: Finished difference Result 14950 states and 20060 transitions. [2020-12-22 09:49:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:40,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:40,925 INFO L225 Difference]: With dead ends: 14950 [2020-12-22 09:49:40,925 INFO L226 Difference]: Without dead ends: 12643 [2020-12-22 09:49:40,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2020-12-22 09:49:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 8863. [2020-12-22 09:49:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8863 states. [2020-12-22 09:49:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 12086 transitions. [2020-12-22 09:49:41,970 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 12086 transitions. Word has length 82 [2020-12-22 09:49:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:41,970 INFO L481 AbstractCegarLoop]: Abstraction has 8863 states and 12086 transitions. [2020-12-22 09:49:41,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 12086 transitions. [2020-12-22 09:49:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:41,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:41,972 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:42,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:42,187 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:42,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:49:42,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:42,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631069707] [2020-12-22 09:49:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:42,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631069707] [2020-12-22 09:49:42,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995581661] [2020-12-22 09:49:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:42,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:49:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:42,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:43,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:43,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:43,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933516633] [2020-12-22 09:49:43,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:43,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:43,043 INFO L87 Difference]: Start difference. First operand 8863 states and 12086 transitions. Second operand 17 states. [2020-12-22 09:49:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:46,929 INFO L93 Difference]: Finished difference Result 32813 states and 43309 transitions. [2020-12-22 09:49:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:46,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:46,994 INFO L225 Difference]: With dead ends: 32813 [2020-12-22 09:49:46,995 INFO L226 Difference]: Without dead ends: 27297 [2020-12-22 09:49:47,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27297 states. [2020-12-22 09:49:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27297 to 19671. [2020-12-22 09:49:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19671 states. [2020-12-22 09:49:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19671 states to 19671 states and 25820 transitions. [2020-12-22 09:49:49,045 INFO L78 Accepts]: Start accepts. Automaton has 19671 states and 25820 transitions. Word has length 82 [2020-12-22 09:49:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:49,045 INFO L481 AbstractCegarLoop]: Abstraction has 19671 states and 25820 transitions. [2020-12-22 09:49:49,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 19671 states and 25820 transitions. [2020-12-22 09:49:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:49,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:49,047 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:49,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:49:49,253 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:49:49,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:49,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310538022] [2020-12-22 09:49:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:49:49,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310538022] [2020-12-22 09:49:49,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:49,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:49,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839170639] [2020-12-22 09:49:49,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:49,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:49,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:49,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:49,344 INFO L87 Difference]: Start difference. First operand 19671 states and 25820 transitions. Second operand 6 states. [2020-12-22 09:49:50,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:50,705 INFO L93 Difference]: Finished difference Result 34115 states and 44420 transitions. [2020-12-22 09:49:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:50,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:50,739 INFO L225 Difference]: With dead ends: 34115 [2020-12-22 09:49:50,739 INFO L226 Difference]: Without dead ends: 16828 [2020-12-22 09:49:50,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16828 states. [2020-12-22 09:49:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16828 to 16828. [2020-12-22 09:49:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16828 states. [2020-12-22 09:49:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16828 states to 16828 states and 21936 transitions. [2020-12-22 09:49:52,435 INFO L78 Accepts]: Start accepts. Automaton has 16828 states and 21936 transitions. Word has length 82 [2020-12-22 09:49:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:52,436 INFO L481 AbstractCegarLoop]: Abstraction has 16828 states and 21936 transitions. [2020-12-22 09:49:52,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 16828 states and 21936 transitions. [2020-12-22 09:49:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:52,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:52,439 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:52,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:49:52,439 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:49:52,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:52,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733476213] [2020-12-22 09:49:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:49:52,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733476213] [2020-12-22 09:49:52,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:52,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:52,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550629979] [2020-12-22 09:49:52,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:52,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:52,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:52,508 INFO L87 Difference]: Start difference. First operand 16828 states and 21936 transitions. Second operand 6 states. [2020-12-22 09:49:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:54,125 INFO L93 Difference]: Finished difference Result 27573 states and 35601 transitions. [2020-12-22 09:49:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:54,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:54,148 INFO L225 Difference]: With dead ends: 27573 [2020-12-22 09:49:54,148 INFO L226 Difference]: Without dead ends: 13155 [2020-12-22 09:49:54,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2020-12-22 09:49:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 13155. [2020-12-22 09:49:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13155 states. [2020-12-22 09:49:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13155 states to 13155 states and 17158 transitions. [2020-12-22 09:49:55,491 INFO L78 Accepts]: Start accepts. Automaton has 13155 states and 17158 transitions. Word has length 82 [2020-12-22 09:49:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:55,492 INFO L481 AbstractCegarLoop]: Abstraction has 13155 states and 17158 transitions. [2020-12-22 09:49:55,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13155 states and 17158 transitions. [2020-12-22 09:49:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:55,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:55,494 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:55,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:49:55,495 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:49:55,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:55,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643378841] [2020-12-22 09:49:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:49:55,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643378841] [2020-12-22 09:49:55,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:55,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:55,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305822949] [2020-12-22 09:49:55,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:55,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:55,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:55,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:55,565 INFO L87 Difference]: Start difference. First operand 13155 states and 17158 transitions. Second operand 6 states. [2020-12-22 09:49:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:56,919 INFO L93 Difference]: Finished difference Result 21510 states and 27719 transitions. [2020-12-22 09:49:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:56,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:56,935 INFO L225 Difference]: With dead ends: 21510 [2020-12-22 09:49:56,935 INFO L226 Difference]: Without dead ends: 10683 [2020-12-22 09:49:56,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2020-12-22 09:49:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 10683. [2020-12-22 09:49:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10683 states. [2020-12-22 09:49:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 14039 transitions. [2020-12-22 09:49:57,843 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 14039 transitions. Word has length 82 [2020-12-22 09:49:57,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:57,843 INFO L481 AbstractCegarLoop]: Abstraction has 10683 states and 14039 transitions. [2020-12-22 09:49:57,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 14039 transitions. [2020-12-22 09:49:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:57,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:57,844 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:49:57,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:49:57,845 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:49:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:57,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229093123] [2020-12-22 09:49:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:58,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229093123] [2020-12-22 09:49:58,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410260092] [2020-12-22 09:49:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:49:58,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:58,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:58,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:58,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037837494] [2020-12-22 09:49:58,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:58,552 INFO L87 Difference]: Start difference. First operand 10683 states and 14039 transitions. Second operand 17 states. [2020-12-22 09:50:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:04,150 INFO L93 Difference]: Finished difference Result 43485 states and 54479 transitions. [2020-12-22 09:50:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:50:04,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:50:04,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:04,204 INFO L225 Difference]: With dead ends: 43485 [2020-12-22 09:50:04,204 INFO L226 Difference]: Without dead ends: 36464 [2020-12-22 09:50:04,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:50:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36464 states. [2020-12-22 09:50:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36464 to 23602. [2020-12-22 09:50:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23602 states. [2020-12-22 09:50:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23602 states to 23602 states and 30088 transitions. [2020-12-22 09:50:06,904 INFO L78 Accepts]: Start accepts. Automaton has 23602 states and 30088 transitions. Word has length 83 [2020-12-22 09:50:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:06,904 INFO L481 AbstractCegarLoop]: Abstraction has 23602 states and 30088 transitions. [2020-12-22 09:50:06,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:50:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 23602 states and 30088 transitions. [2020-12-22 09:50:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:50:06,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:06,922 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:50:07,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:07,138 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:50:07,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:07,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726505312] [2020-12-22 09:50:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:50:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726505312] [2020-12-22 09:50:07,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:07,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82518423] [2020-12-22 09:50:07,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:07,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:07,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:07,247 INFO L87 Difference]: Start difference. First operand 23602 states and 30088 transitions. Second operand 6 states. [2020-12-22 09:50:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:09,192 INFO L93 Difference]: Finished difference Result 39695 states and 50044 transitions. [2020-12-22 09:50:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:09,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:50:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:09,215 INFO L225 Difference]: With dead ends: 39695 [2020-12-22 09:50:09,216 INFO L226 Difference]: Without dead ends: 18577 [2020-12-22 09:50:09,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18577 states. [2020-12-22 09:50:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18577 to 18577. [2020-12-22 09:50:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18577 states. [2020-12-22 09:50:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18577 states to 18577 states and 23485 transitions. [2020-12-22 09:50:11,377 INFO L78 Accepts]: Start accepts. Automaton has 18577 states and 23485 transitions. Word has length 83 [2020-12-22 09:50:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:11,377 INFO L481 AbstractCegarLoop]: Abstraction has 18577 states and 23485 transitions. [2020-12-22 09:50:11,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 18577 states and 23485 transitions. [2020-12-22 09:50:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:50:11,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:11,380 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:50:11,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:50:11,381 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:50:11,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:11,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314780017] [2020-12-22 09:50:11,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:13,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314780017] [2020-12-22 09:50:13,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030082363] [2020-12-22 09:50:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:50:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:13,989 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:14,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:14,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:50:14,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296450970] [2020-12-22 09:50:14,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:50:14,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:14,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:50:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:50:14,829 INFO L87 Difference]: Start difference. First operand 18577 states and 23485 transitions. Second operand 40 states. [2020-12-22 09:50:15,282 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:50:16,827 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:50:17,074 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:50:17,374 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:50:17,740 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:50:18,193 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:50:18,612 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:50:19,135 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:50:19,635 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:50:19,948 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:50:20,297 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:50:20,537 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:50:20,873 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:50:21,130 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:50:21,473 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:50:21,728 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:50:22,186 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:50:22,412 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:50:22,903 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:50:23,353 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:23,707 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:24,479 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:50:24,716 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:50:24,960 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:25,306 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:50:25,782 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:50:26,008 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:26,189 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:26,619 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:50:26,839 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:50:27,446 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:50:27,789 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:27,994 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:29,139 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:30,323 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:50:30,642 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:50:30,876 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:50:31,354 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:50:31,608 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:50:31,961 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:50:32,184 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:50:32,414 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:50:32,593 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:50:32,779 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:50:32,985 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:33,309 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:50:33,480 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:33,856 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:50:34,137 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:50:34,471 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:50:34,670 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:50:34,902 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:35,150 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:50:35,379 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:50:35,989 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:50:36,180 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:36,498 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:50:37,336 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:50:37,553 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:50:40,786 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:50:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:41,920 INFO L93 Difference]: Finished difference Result 31159 states and 39315 transitions. [2020-12-22 09:50:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:50:41,921 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:50:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:41,950 INFO L225 Difference]: With dead ends: 31159 [2020-12-22 09:50:41,951 INFO L226 Difference]: Without dead ends: 25008 [2020-12-22 09:50:41,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:50:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25008 states. [2020-12-22 09:50:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25008 to 16775. [2020-12-22 09:50:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16775 states. [2020-12-22 09:50:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 21346 transitions. [2020-12-22 09:50:43,874 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 21346 transitions. Word has length 84 [2020-12-22 09:50:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:43,874 INFO L481 AbstractCegarLoop]: Abstraction has 16775 states and 21346 transitions. [2020-12-22 09:50:43,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:50:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 21346 transitions. [2020-12-22 09:50:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:50:43,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:43,877 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:50:44,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:50:44,093 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:50:44,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:44,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424869802] [2020-12-22 09:50:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:44,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424869802] [2020-12-22 09:50:44,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389297541] [2020-12-22 09:50:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:50:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:45,237 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:45,670 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:50:46,283 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:50:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:46,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:46,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:50:46,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722810059] [2020-12-22 09:50:46,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:50:46,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:50:46,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:50:46,348 INFO L87 Difference]: Start difference. First operand 16775 states and 21346 transitions. Second operand 23 states. [2020-12-22 09:50:46,517 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:47,290 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:47,505 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:50:47,915 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:50:48,167 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:50:48,479 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:50:48,986 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:49,488 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:50,006 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:50,365 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:50:50,804 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:50:51,176 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:50:51,665 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:50:51,859 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:50:52,200 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:50:52,485 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:50:52,934 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:50:53,207 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:50:53,537 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:50:53,780 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:50:54,357 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:50:55,215 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:50:55,441 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:50:55,725 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:50:56,050 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:50:56,630 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:50:57,007 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:50:57,641 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:57,926 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:50:58,125 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:58,727 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:59,040 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:59,293 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:59,481 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:59,799 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:51:00,168 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:51:00,368 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:51:00,614 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:51:00,949 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:51:01,229 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:51:01,798 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:51:02,018 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:51:02,276 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:51:02,924 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:51:03,284 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:51:03,569 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:51:03,928 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:51:04,302 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:51:04,837 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:51:05,120 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:51:05,407 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:51:05,645 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:51:06,074 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:51:06,377 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:51:06,742 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:51:08,343 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:51:08,925 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:51:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:10,683 INFO L93 Difference]: Finished difference Result 30891 states and 39471 transitions. [2020-12-22 09:51:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:51:10,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:51:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:10,707 INFO L225 Difference]: With dead ends: 30891 [2020-12-22 09:51:10,707 INFO L226 Difference]: Without dead ends: 22210 [2020-12-22 09:51:10,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:51:10,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22210 states. [2020-12-22 09:51:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22210 to 12522. [2020-12-22 09:51:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12522 states. [2020-12-22 09:51:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 16204 transitions. [2020-12-22 09:51:12,385 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 16204 transitions. Word has length 84 [2020-12-22 09:51:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:12,385 INFO L481 AbstractCegarLoop]: Abstraction has 12522 states and 16204 transitions. [2020-12-22 09:51:12,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:51:12,385 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 16204 transitions. [2020-12-22 09:51:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:51:12,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:12,386 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:51:12,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:51:12,596 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:51:12,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:12,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892246341] [2020-12-22 09:51:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:13,149 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:51:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:13,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892246341] [2020-12-22 09:51:13,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469078232] [2020-12-22 09:51:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:51:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:14,027 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:51:14,334 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:51:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:14,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:14,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:51:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656422205] [2020-12-22 09:51:14,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:51:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:51:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:51:14,882 INFO L87 Difference]: Start difference. First operand 12522 states and 16204 transitions. Second operand 24 states. [2020-12-22 09:51:15,576 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:51:15,899 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:51:16,276 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:51:16,564 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:51:16,813 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 09:51:17,118 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:51:17,541 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:51:18,116 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:51:18,668 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:51:18,901 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:51:19,325 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:51:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:21,661 INFO L93 Difference]: Finished difference Result 19352 states and 24464 transitions. [2020-12-22 09:51:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:51:21,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:51:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:21,684 INFO L225 Difference]: With dead ends: 19352 [2020-12-22 09:51:21,684 INFO L226 Difference]: Without dead ends: 14457 [2020-12-22 09:51:21,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:51:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14457 states. [2020-12-22 09:51:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14457 to 10430. [2020-12-22 09:51:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10430 states. [2020-12-22 09:51:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10430 states to 10430 states and 13673 transitions. [2020-12-22 09:51:23,114 INFO L78 Accepts]: Start accepts. Automaton has 10430 states and 13673 transitions. Word has length 86 [2020-12-22 09:51:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:23,114 INFO L481 AbstractCegarLoop]: Abstraction has 10430 states and 13673 transitions. [2020-12-22 09:51:23,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:51:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 10430 states and 13673 transitions. [2020-12-22 09:51:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:51:23,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:23,120 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-12-22 09:51:23,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:23,330 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:23,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:51:23,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:23,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967575510] [2020-12-22 09:51:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:23,730 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:51:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:23,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967575510] [2020-12-22 09:51:23,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832818929] [2020-12-22 09:51:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:23,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:51:23,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:51:24,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:24,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:51:24,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714447572] [2020-12-22 09:51:24,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:51:24,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:24,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:51:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:51:24,454 INFO L87 Difference]: Start difference. First operand 10430 states and 13673 transitions. Second operand 15 states. [2020-12-22 09:51:24,595 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:51:25,101 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:51:25,352 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:25,507 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:25,840 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:26,180 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:26,506 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:26,685 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:26,872 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:27,159 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:27,331 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:27,512 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:28,275 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:28,879 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:29,110 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:29,320 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:29,679 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:30,045 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:30,644 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:31,322 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:51:31,494 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:31,664 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:32,125 INFO L93 Difference]: Finished difference Result 22311 states and 28339 transitions. [2020-12-22 09:51:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:51:32,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:51:32,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:32,143 INFO L225 Difference]: With dead ends: 22311 [2020-12-22 09:51:32,143 INFO L226 Difference]: Without dead ends: 14857 [2020-12-22 09:51:32,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:51:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14857 states. [2020-12-22 09:51:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14857 to 14741. [2020-12-22 09:51:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14741 states. [2020-12-22 09:51:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14741 states to 14741 states and 18394 transitions. [2020-12-22 09:51:34,351 INFO L78 Accepts]: Start accepts. Automaton has 14741 states and 18394 transitions. Word has length 135 [2020-12-22 09:51:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:34,351 INFO L481 AbstractCegarLoop]: Abstraction has 14741 states and 18394 transitions. [2020-12-22 09:51:34,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:51:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 14741 states and 18394 transitions. [2020-12-22 09:51:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:51:34,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:34,357 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 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] [2020-12-22 09:51:34,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 09:51:34,571 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:51:34,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:34,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862949976] [2020-12-22 09:51:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:35,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862949976] [2020-12-22 09:51:35,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225539217] [2020-12-22 09:51:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:35,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:51:35,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:35,583 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:51:36,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:51:36,334 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:36,595 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:37,165 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:38,213 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:39,488 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:40,995 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:42,697 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:43,522 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:43,966 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:44,757 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:51:52,789 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:52:06,659 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:52:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:07,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:07,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:52:07,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831830354] [2020-12-22 09:52:07,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:52:07,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:52:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:52:07,244 INFO L87 Difference]: Start difference. First operand 14741 states and 18394 transitions. Second operand 22 states. [2020-12-22 09:52:07,708 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-22 09:52:08,479 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 09:52:09,116 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-22 09:52:09,773 WARN L197 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-12-22 09:52:10,938 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2020-12-22 09:52:14,477 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2020-12-22 09:52:17,892 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-12-22 09:52:18,423 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:52:19,218 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2020-12-22 09:52:19,978 WARN L197 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2020-12-22 09:52:20,561 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 09:52:21,233 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:52:22,664 WARN L197 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2020-12-22 09:52:26,692 WARN L197 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 300 DAG size of output: 297 [2020-12-22 09:52:27,548 WARN L197 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-12-22 09:52:31,605 WARN L197 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 307 DAG size of output: 302 [2020-12-22 09:52:36,177 WARN L197 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 297 DAG size of output: 294