/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.BOUNDED-8.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:44:37,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:44:37,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:44:38,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:44:38,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:44:38,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:44:38,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:44:38,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:44:38,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:44:38,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:44:38,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:44:38,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:44:38,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:44:38,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:44:38,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:44:38,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:44:38,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:44:38,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:44:38,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:44:38,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:44:38,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:44:38,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:44:38,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:44:38,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:44:38,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:44:38,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:44:38,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:44:38,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:44:38,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:44:38,143 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:44:38,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:44:38,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:44:38,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:44:38,145 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:44:38,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:44:38,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:44:38,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:44:38,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:44:38,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:44:38,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:44:38,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:44:38,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:44:38,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:44:38,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:44:38,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:44:38,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:44:38,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:44:38,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:44:38,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:44:38,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:44:38,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:44:38,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:44:38,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:44:38,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:44:38,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:44:38,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:44:38,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:44:38,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:44:38,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:44:38,629 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:44:38,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2020-12-22 09:44:38,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef161945a/b6539aaa84d04c4f8781661dbbbee032/FLAG5f7047bc6 [2020-12-22 09:44:39,834 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:44:39,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2020-12-22 09:44:39,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef161945a/b6539aaa84d04c4f8781661dbbbee032/FLAG5f7047bc6 [2020-12-22 09:44:40,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef161945a/b6539aaa84d04c4f8781661dbbbee032 [2020-12-22 09:44:40,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:44:40,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:44:40,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:40,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:44:40,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:44:40,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:40" (1/1) ... [2020-12-22 09:44:40,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ab8ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:40, skipping insertion in model container [2020-12-22 09:44:40,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:40" (1/1) ... [2020-12-22 09:44:40,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:44:40,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:44:40,884 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.BOUNDED-8.pals+Problem12_label03.c[8688,8701] [2020-12-22 09:44:40,967 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.BOUNDED-8.pals+Problem12_label03.c[10782,10795] [2020-12-22 09:44:42,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:42,240 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:44:42,280 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.BOUNDED-8.pals+Problem12_label03.c[8688,8701] [2020-12-22 09:44:42,288 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.BOUNDED-8.pals+Problem12_label03.c[10782,10795] [2020-12-22 09:44:43,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:43,194 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:44:43,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43 WrapperNode [2020-12-22 09:44:43,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:43,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:43,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:44:43,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:44:43,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:43,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:43,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:43,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:44:43,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:44:43,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:44:43,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:43,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:43,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:43,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:44,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:44,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:44,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (1/1) ... [2020-12-22 09:44:44,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:44:44,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:44:44,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:44:44,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:44:44,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (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 09:44:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:44:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:44:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:44:44,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:44:50,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:44:50,151 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:44:50,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:50 BoogieIcfgContainer [2020-12-22 09:44:50,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:44:50,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:44:50,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:44:50,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:44:50,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:44:40" (1/3) ... [2020-12-22 09:44:50,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57094d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:50, skipping insertion in model container [2020-12-22 09:44:50,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:43" (2/3) ... [2020-12-22 09:44:50,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57094d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:50, skipping insertion in model container [2020-12-22 09:44:50,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:50" (3/3) ... [2020-12-22 09:44:50,166 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2020-12-22 09:44:50,174 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:44:50,181 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:44:50,204 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:44:50,242 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:44:50,243 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:44:50,243 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:44:50,243 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:44:50,243 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:44:50,243 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:44:50,243 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:44:50,244 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:44:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:44:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 09:44:50,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:50,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:50,293 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1736774821, now seen corresponding path program 1 times [2020-12-22 09:44:50,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:50,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488893985] [2020-12-22 09:44:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:50,651 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 09:44:50,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488893985] [2020-12-22 09:44:50,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:50,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:44:50,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370197554] [2020-12-22 09:44:50,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:50,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:50,688 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 3 states. [2020-12-22 09:44:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:57,883 INFO L93 Difference]: Finished difference Result 2528 states and 4850 transitions. [2020-12-22 09:44:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:57,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 09:44:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:57,932 INFO L225 Difference]: With dead ends: 2528 [2020-12-22 09:44:57,932 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 09:44:57,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:57,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 09:44:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2020-12-22 09:44:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:44:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2539 transitions. [2020-12-22 09:44:58,072 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2539 transitions. Word has length 20 [2020-12-22 09:44:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:58,073 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2539 transitions. [2020-12-22 09:44:58,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2539 transitions. [2020-12-22 09:44:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:44:58,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:58,075 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 09:44:58,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:44:58,076 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:44:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:58,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30496264] [2020-12-22 09:44:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:58,184 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 09:44:58,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30496264] [2020-12-22 09:44:58,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:58,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:58,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645051368] [2020-12-22 09:44:58,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:44:58,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:44:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:44:58,193 INFO L87 Difference]: Start difference. First operand 1578 states and 2539 transitions. Second operand 5 states. [2020-12-22 09:44:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:58,302 INFO L93 Difference]: Finished difference Result 1670 states and 2681 transitions. [2020-12-22 09:44:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:58,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:44:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:58,312 INFO L225 Difference]: With dead ends: 1670 [2020-12-22 09:44:58,312 INFO L226 Difference]: Without dead ends: 1622 [2020-12-22 09:44:58,314 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 09:44:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2020-12-22 09:44:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1578. [2020-12-22 09:44:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:44:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2516 transitions. [2020-12-22 09:44:58,356 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2516 transitions. Word has length 30 [2020-12-22 09:44:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:58,357 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2516 transitions. [2020-12-22 09:44:58,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:44:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2516 transitions. [2020-12-22 09:44:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:58,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:58,359 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 09:44:58,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:44:58,360 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:44:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:58,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858093693] [2020-12-22 09:44:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:58,452 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 09:44:58,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858093693] [2020-12-22 09:44:58,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:58,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:58,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863978576] [2020-12-22 09:44:58,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:58,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:58,455 INFO L87 Difference]: Start difference. First operand 1578 states and 2516 transitions. Second operand 3 states. [2020-12-22 09:44:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:58,502 INFO L93 Difference]: Finished difference Result 1660 states and 2644 transitions. [2020-12-22 09:44:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:58,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:58,513 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 09:44:58,514 INFO L226 Difference]: Without dead ends: 1616 [2020-12-22 09:44:58,516 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 09:44:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-12-22 09:44:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2020-12-22 09:44:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-12-22 09:44:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2573 transitions. [2020-12-22 09:44:58,567 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2573 transitions. Word has length 52 [2020-12-22 09:44:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:58,569 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2573 transitions. [2020-12-22 09:44:58,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2573 transitions. [2020-12-22 09:44:58,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:58,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:58,576 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 09:44:58,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:44:58,576 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:44:58,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:58,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652166176] [2020-12-22 09:44:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:58,655 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 09:44:58,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652166176] [2020-12-22 09:44:58,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:58,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:58,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134743232] [2020-12-22 09:44:58,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:58,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:58,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:58,658 INFO L87 Difference]: Start difference. First operand 1614 states and 2573 transitions. Second operand 3 states. [2020-12-22 09:44:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:58,705 INFO L93 Difference]: Finished difference Result 1762 states and 2805 transitions. [2020-12-22 09:44:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:58,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:58,715 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 09:44:58,715 INFO L226 Difference]: Without dead ends: 1682 [2020-12-22 09:44:58,716 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 09:44:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2020-12-22 09:44:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2020-12-22 09:44:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 09:44:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2676 transitions. [2020-12-22 09:44:58,763 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2676 transitions. Word has length 52 [2020-12-22 09:44:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:58,764 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 2676 transitions. [2020-12-22 09:44:58,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2676 transitions. [2020-12-22 09:44:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:58,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:58,766 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 09:44:58,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:44:58,767 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:58,768 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:44:58,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:58,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321157977] [2020-12-22 09:44:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:58,891 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 09:44:58,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321157977] [2020-12-22 09:44:58,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:58,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362606027] [2020-12-22 09:44:58,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:58,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:58,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:58,894 INFO L87 Difference]: Start difference. First operand 1680 states and 2676 transitions. Second operand 3 states. [2020-12-22 09:44:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:58,944 INFO L93 Difference]: Finished difference Result 1948 states and 3094 transitions. [2020-12-22 09:44:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:58,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:58,955 INFO L225 Difference]: With dead ends: 1948 [2020-12-22 09:44:58,956 INFO L226 Difference]: Without dead ends: 1802 [2020-12-22 09:44:58,957 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 09:44:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-12-22 09:44:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-12-22 09:44:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 09:44:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2860 transitions. [2020-12-22 09:44:59,006 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2860 transitions. Word has length 52 [2020-12-22 09:44:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:59,006 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 2860 transitions. [2020-12-22 09:44:59,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2860 transitions. [2020-12-22 09:44:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:59,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:59,007 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 09:44:59,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:44:59,008 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:44:59,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:59,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401958835] [2020-12-22 09:44:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:59,078 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 09:44:59,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401958835] [2020-12-22 09:44:59,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:59,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:59,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208697715] [2020-12-22 09:44:59,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:59,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:59,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:59,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:59,081 INFO L87 Difference]: Start difference. First operand 1800 states and 2860 transitions. Second operand 3 states. [2020-12-22 09:44:59,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:59,146 INFO L93 Difference]: Finished difference Result 2284 states and 3606 transitions. [2020-12-22 09:44:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:59,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:59,158 INFO L225 Difference]: With dead ends: 2284 [2020-12-22 09:44:59,159 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:44:59,161 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 09:44:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:44:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2020-12-22 09:44:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-12-22 09:44:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3184 transitions. [2020-12-22 09:44:59,224 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3184 transitions. Word has length 52 [2020-12-22 09:44:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:59,225 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3184 transitions. [2020-12-22 09:44:59,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3184 transitions. [2020-12-22 09:44:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:59,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:59,226 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 09:44:59,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:44:59,226 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:44:59,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:59,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383643777] [2020-12-22 09:44:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:59,336 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 09:44:59,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383643777] [2020-12-22 09:44:59,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:59,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585374041] [2020-12-22 09:44:59,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:59,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:59,340 INFO L87 Difference]: Start difference. First operand 2016 states and 3184 transitions. Second operand 6 states. [2020-12-22 09:44:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:59,744 INFO L93 Difference]: Finished difference Result 5872 states and 9080 transitions. [2020-12-22 09:44:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:44:59,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:44:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:59,778 INFO L225 Difference]: With dead ends: 5872 [2020-12-22 09:44:59,778 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 09:44:59,785 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 09:44:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 09:45:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2020-12-22 09:45:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 09:45:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3888 transitions. [2020-12-22 09:45:00,017 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3888 transitions. Word has length 52 [2020-12-22 09:45:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:00,017 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 3888 transitions. [2020-12-22 09:45:00,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3888 transitions. [2020-12-22 09:45:00,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:00,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:00,018 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 09:45:00,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:45:00,019 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:45:00,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:00,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898430615] [2020-12-22 09:45:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:00,133 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 09:45:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898430615] [2020-12-22 09:45:00,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:00,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559228752] [2020-12-22 09:45:00,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:00,137 INFO L87 Difference]: Start difference. First operand 2496 states and 3888 transitions. Second operand 3 states. [2020-12-22 09:45:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:00,275 INFO L93 Difference]: Finished difference Result 3902 states and 5988 transitions. [2020-12-22 09:45:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:00,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:45:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:00,293 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 09:45:00,293 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:45:00,296 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 09:45:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:45:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:45:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4522 transitions. [2020-12-22 09:45:00,421 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4522 transitions. Word has length 54 [2020-12-22 09:45:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:00,423 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4522 transitions. [2020-12-22 09:45:00,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4522 transitions. [2020-12-22 09:45:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:00,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:00,424 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 09:45:00,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:45:00,425 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:45:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:00,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037894553] [2020-12-22 09:45:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:00,652 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 09:45:00,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037894553] [2020-12-22 09:45:00,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:00,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360375435] [2020-12-22 09:45:00,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:00,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:00,655 INFO L87 Difference]: Start difference. First operand 2938 states and 4522 transitions. Second operand 6 states. [2020-12-22 09:45:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:00,910 INFO L93 Difference]: Finished difference Result 4342 states and 6596 transitions. [2020-12-22 09:45:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:00,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:45:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:00,927 INFO L225 Difference]: With dead ends: 4342 [2020-12-22 09:45:00,927 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:45:00,930 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 09:45:00,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:45:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:45:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4498 transitions. [2020-12-22 09:45:01,058 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4498 transitions. Word has length 54 [2020-12-22 09:45:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:01,062 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4498 transitions. [2020-12-22 09:45:01,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4498 transitions. [2020-12-22 09:45:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:01,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:01,063 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 09:45:01,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:45:01,064 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:01,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:45:01,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:01,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472136280] [2020-12-22 09:45:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:01,177 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 09:45:01,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472136280] [2020-12-22 09:45:01,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:01,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:01,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146658535] [2020-12-22 09:45:01,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:01,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:01,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:01,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:01,186 INFO L87 Difference]: Start difference. First operand 2938 states and 4498 transitions. Second operand 6 states. [2020-12-22 09:45:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:01,438 INFO L93 Difference]: Finished difference Result 4340 states and 6547 transitions. [2020-12-22 09:45:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:01,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:01,473 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:45:01,474 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:45:01,479 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 09:45:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:45:01,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:45:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4474 transitions. [2020-12-22 09:45:01,634 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4474 transitions. Word has length 55 [2020-12-22 09:45:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:01,635 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4474 transitions. [2020-12-22 09:45:01,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4474 transitions. [2020-12-22 09:45:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:01,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:01,636 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 09:45:01,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:45:01,636 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:45:01,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:01,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402683031] [2020-12-22 09:45:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:01,730 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 09:45:01,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402683031] [2020-12-22 09:45:01,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:01,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:01,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170017047] [2020-12-22 09:45:01,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:01,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:01,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:01,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:01,738 INFO L87 Difference]: Start difference. First operand 2938 states and 4474 transitions. Second operand 6 states. [2020-12-22 09:45:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:01,990 INFO L93 Difference]: Finished difference Result 4340 states and 6499 transitions. [2020-12-22 09:45:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:01,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:01,999 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:45:01,999 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:45:02,003 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 09:45:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:45:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:45:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4450 transitions. [2020-12-22 09:45:02,229 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4450 transitions. Word has length 55 [2020-12-22 09:45:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:02,230 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4450 transitions. [2020-12-22 09:45:02,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4450 transitions. [2020-12-22 09:45:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:02,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:02,231 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 09:45:02,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:45:02,231 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:45:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:02,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140529675] [2020-12-22 09:45:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:02,316 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 09:45:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140529675] [2020-12-22 09:45:02,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:02,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:02,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145478028] [2020-12-22 09:45:02,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:02,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:02,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:02,318 INFO L87 Difference]: Start difference. First operand 2938 states and 4450 transitions. Second operand 5 states. [2020-12-22 09:45:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:02,611 INFO L93 Difference]: Finished difference Result 4169 states and 6148 transitions. [2020-12-22 09:45:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:45:02,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:45:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:02,621 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 09:45:02,621 INFO L226 Difference]: Without dead ends: 4167 [2020-12-22 09:45:02,623 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 09:45:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-12-22 09:45:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2020-12-22 09:45:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:45:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4538 transitions. [2020-12-22 09:45:02,808 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4538 transitions. Word has length 55 [2020-12-22 09:45:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:02,809 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4538 transitions. [2020-12-22 09:45:02,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4538 transitions. [2020-12-22 09:45:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:02,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:02,818 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] [2020-12-22 09:45:02,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:45:02,819 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:02,820 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:45:02,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:02,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751864717] [2020-12-22 09:45:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:45:02,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751864717] [2020-12-22 09:45:02,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:02,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:02,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795706033] [2020-12-22 09:45:02,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:02,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:02,933 INFO L87 Difference]: Start difference. First operand 3034 states and 4538 transitions. Second operand 6 states. [2020-12-22 09:45:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:03,539 INFO L93 Difference]: Finished difference Result 9340 states and 13307 transitions. [2020-12-22 09:45:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:03,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:03,557 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:45:03,558 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:45:03,563 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 09:45:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:45:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:45:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:45:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6602 transitions. [2020-12-22 09:45:04,056 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6602 transitions. Word has length 79 [2020-12-22 09:45:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:04,057 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6602 transitions. [2020-12-22 09:45:04,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6602 transitions. [2020-12-22 09:45:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:04,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:04,060 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] [2020-12-22 09:45:04,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:45:04,061 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:45:04,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:04,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133936042] [2020-12-22 09:45:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:45:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133936042] [2020-12-22 09:45:04,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:04,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:04,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101494394] [2020-12-22 09:45:04,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:04,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:04,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:04,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:04,187 INFO L87 Difference]: Start difference. First operand 4530 states and 6602 transitions. Second operand 6 states. [2020-12-22 09:45:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:05,065 INFO L93 Difference]: Finished difference Result 10836 states and 15371 transitions. [2020-12-22 09:45:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:05,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:05,094 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:45:05,094 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:45:05,103 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 09:45:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:45:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:45:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:45:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9678 transitions. [2020-12-22 09:45:05,675 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9678 transitions. Word has length 79 [2020-12-22 09:45:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:05,675 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 9678 transitions. [2020-12-22 09:45:05,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9678 transitions. [2020-12-22 09:45:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:05,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:05,679 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] [2020-12-22 09:45:05,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:45:05,679 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:05,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:45:05,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:05,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158647315] [2020-12-22 09:45:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:45:05,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158647315] [2020-12-22 09:45:05,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:05,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:05,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333909698] [2020-12-22 09:45:05,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:05,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:05,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:05,785 INFO L87 Difference]: Start difference. First operand 6778 states and 9678 transitions. Second operand 6 states. [2020-12-22 09:45:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:06,873 INFO L93 Difference]: Finished difference Result 12332 states and 17435 transitions. [2020-12-22 09:45:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:06,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:06,901 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:45:06,901 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:45:06,911 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 09:45:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:45:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:45:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:45:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11742 transitions. [2020-12-22 09:45:07,833 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11742 transitions. Word has length 79 [2020-12-22 09:45:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:07,834 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 11742 transitions. [2020-12-22 09:45:07,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:07,834 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11742 transitions. [2020-12-22 09:45:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:07,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:07,839 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] [2020-12-22 09:45:07,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:45:07,839 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:07,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:45:07,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:07,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702886562] [2020-12-22 09:45:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:45:07,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702886562] [2020-12-22 09:45:07,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:07,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035884101] [2020-12-22 09:45:07,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:07,948 INFO L87 Difference]: Start difference. First operand 8274 states and 11742 transitions. Second operand 6 states. [2020-12-22 09:45:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:09,009 INFO L93 Difference]: Finished difference Result 12948 states and 18299 transitions. [2020-12-22 09:45:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:09,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:09,045 INFO L225 Difference]: With dead ends: 12948 [2020-12-22 09:45:09,045 INFO L226 Difference]: Without dead ends: 11890 [2020-12-22 09:45:09,052 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 09:45:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2020-12-22 09:45:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2020-12-22 09:45:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9330 states. [2020-12-22 09:45:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13214 transitions. [2020-12-22 09:45:09,836 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13214 transitions. Word has length 79 [2020-12-22 09:45:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:09,836 INFO L481 AbstractCegarLoop]: Abstraction has 9330 states and 13214 transitions. [2020-12-22 09:45:09,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13214 transitions. [2020-12-22 09:45:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:45:09,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:09,841 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] [2020-12-22 09:45:09,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:45:09,841 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:45:09,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:09,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308749034] [2020-12-22 09:45:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:10,133 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 09:45:10,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308749034] [2020-12-22 09:45:10,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680820019] [2020-12-22 09:45:10,135 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 09:45:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:45:10,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:10,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:11,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:11,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:45:11,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987245871] [2020-12-22 09:45:11,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:45:11,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:45:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:45:11,073 INFO L87 Difference]: Start difference. First operand 9330 states and 13214 transitions. Second operand 18 states. [2020-12-22 09:45:11,221 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:13,116 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:13,442 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:14,593 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:14,866 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:15,305 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:15,598 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:16,044 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:45:16,950 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:18,446 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:20,903 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:21,509 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:21,687 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:22,555 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:45:22,966 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:23,713 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:45:25,189 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:25,831 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:25,967 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:26,220 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:26,354 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:30,325 INFO L93 Difference]: Finished difference Result 85950 states and 117309 transitions. [2020-12-22 09:45:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:45:30,326 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:45:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:30,507 INFO L225 Difference]: With dead ends: 85950 [2020-12-22 09:45:30,507 INFO L226 Difference]: Without dead ends: 78156 [2020-12-22 09:45:30,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:45:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78156 states. [2020-12-22 09:45:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78156 to 35946. [2020-12-22 09:45:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35946 states. [2020-12-22 09:45:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35946 states to 35946 states and 49732 transitions. [2020-12-22 09:45:34,538 INFO L78 Accepts]: Start accepts. Automaton has 35946 states and 49732 transitions. Word has length 80 [2020-12-22 09:45:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,538 INFO L481 AbstractCegarLoop]: Abstraction has 35946 states and 49732 transitions. [2020-12-22 09:45:34,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:45:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 35946 states and 49732 transitions. [2020-12-22 09:45:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:34,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,547 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 09:45:34,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:45:34,755 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,756 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:45:34,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906206729] [2020-12-22 09:45:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,841 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 09:45:34,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906206729] [2020-12-22 09:45:34,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:34,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282118613] [2020-12-22 09:45:34,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:34,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:34,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,845 INFO L87 Difference]: Start difference. First operand 35946 states and 49732 transitions. Second operand 3 states. [2020-12-22 09:45:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:37,848 INFO L93 Difference]: Finished difference Result 70358 states and 97016 transitions. [2020-12-22 09:45:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:37,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:45:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:37,916 INFO L225 Difference]: With dead ends: 70358 [2020-12-22 09:45:37,917 INFO L226 Difference]: Without dead ends: 35948 [2020-12-22 09:45:37,967 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 09:45:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35948 states. [2020-12-22 09:45:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35948 to 34986. [2020-12-22 09:45:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34986 states. [2020-12-22 09:45:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34986 states to 34986 states and 47692 transitions. [2020-12-22 09:45:41,322 INFO L78 Accepts]: Start accepts. Automaton has 34986 states and 47692 transitions. Word has length 81 [2020-12-22 09:45:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:41,322 INFO L481 AbstractCegarLoop]: Abstraction has 34986 states and 47692 transitions. [2020-12-22 09:45:41,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34986 states and 47692 transitions. [2020-12-22 09:45:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:41,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:41,327 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] [2020-12-22 09:45:41,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:45:41,328 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:45:41,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:41,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639723083] [2020-12-22 09:45:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:41,576 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 09:45:41,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639723083] [2020-12-22 09:45:41,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054566466] [2020-12-22 09:45:41,577 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 09:45:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:45:41,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:41,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:42,312 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 09:45:42,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:42,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:45:42,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602457505] [2020-12-22 09:45:42,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:45:42,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:45:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:45:42,315 INFO L87 Difference]: Start difference. First operand 34986 states and 47692 transitions. Second operand 19 states. [2020-12-22 09:45:42,486 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:45:42,624 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:45:42,789 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:42,941 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:45:43,099 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:43,614 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:44,580 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2020-12-22 09:45:44,990 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:48,897 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:49,691 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:49,823 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:50,220 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:50,950 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:51,211 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:45:51,580 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:51,971 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:52,526 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:45:52,937 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:53,143 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:53,667 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:45:55,262 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:55,831 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:56,224 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:01,278 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:01,928 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:02,391 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:02,566 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:03,159 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:03,439 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:04,412 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:04,589 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:13,711 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:14,337 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:18,209 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:18,687 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:29,002 INFO L93 Difference]: Finished difference Result 372069 states and 494962 transitions. [2020-12-22 09:46:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:46:29,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:46:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:29,882 INFO L225 Difference]: With dead ends: 372069 [2020-12-22 09:46:29,883 INFO L226 Difference]: Without dead ends: 338619 [2020-12-22 09:46:29,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:46:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338619 states. [2020-12-22 09:46:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338619 to 166484. [2020-12-22 09:46:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166484 states. [2020-12-22 09:46:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166484 states to 166484 states and 223812 transitions. [2020-12-22 09:46:48,085 INFO L78 Accepts]: Start accepts. Automaton has 166484 states and 223812 transitions. Word has length 81 [2020-12-22 09:46:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:48,086 INFO L481 AbstractCegarLoop]: Abstraction has 166484 states and 223812 transitions. [2020-12-22 09:46:48,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:46:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 166484 states and 223812 transitions. [2020-12-22 09:46:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:48,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:48,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:48,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:48,309 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:46:48,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:48,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290931914] [2020-12-22 09:46:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:48,385 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 09:46:48,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290931914] [2020-12-22 09:46:48,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:48,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:48,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537400162] [2020-12-22 09:46:48,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:48,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:48,388 INFO L87 Difference]: Start difference. First operand 166484 states and 223812 transitions. Second operand 3 states. [2020-12-22 09:46:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:58,136 INFO L93 Difference]: Finished difference Result 258048 states and 346328 transitions. [2020-12-22 09:46:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:58,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:58,262 INFO L225 Difference]: With dead ends: 258048 [2020-12-22 09:46:58,262 INFO L226 Difference]: Without dead ends: 93100 [2020-12-22 09:46:58,593 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 09:46:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93100 states. [2020-12-22 09:47:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93100 to 93098. [2020-12-22 09:47:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93098 states. [2020-12-22 09:47:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93098 states to 93098 states and 123268 transitions. [2020-12-22 09:47:07,207 INFO L78 Accepts]: Start accepts. Automaton has 93098 states and 123268 transitions. Word has length 81 [2020-12-22 09:47:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:07,207 INFO L481 AbstractCegarLoop]: Abstraction has 93098 states and 123268 transitions. [2020-12-22 09:47:07,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 93098 states and 123268 transitions. [2020-12-22 09:47:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:07,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:07,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:07,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:47:07,213 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:47:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:07,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138635582] [2020-12-22 09:47:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:07,296 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 09:47:07,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138635582] [2020-12-22 09:47:07,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:07,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501148776] [2020-12-22 09:47:07,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:07,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:07,300 INFO L87 Difference]: Start difference. First operand 93098 states and 123268 transitions. Second operand 3 states. [2020-12-22 09:47:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:11,439 INFO L93 Difference]: Finished difference Result 135079 states and 179136 transitions. [2020-12-22 09:47:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:11,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:11,487 INFO L225 Difference]: With dead ends: 135079 [2020-12-22 09:47:11,489 INFO L226 Difference]: Without dead ends: 43517 [2020-12-22 09:47:11,527 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 09:47:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43517 states. [2020-12-22 09:47:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43517 to 43491. [2020-12-22 09:47:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43491 states. [2020-12-22 09:47:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43491 states to 43491 states and 57496 transitions. [2020-12-22 09:47:15,478 INFO L78 Accepts]: Start accepts. Automaton has 43491 states and 57496 transitions. Word has length 81 [2020-12-22 09:47:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:15,478 INFO L481 AbstractCegarLoop]: Abstraction has 43491 states and 57496 transitions. [2020-12-22 09:47:15,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 43491 states and 57496 transitions. [2020-12-22 09:47:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:15,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:15,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:15,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:47:15,482 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:47:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:15,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139976449] [2020-12-22 09:47:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:47:15,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139976449] [2020-12-22 09:47:15,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:15,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:15,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813272623] [2020-12-22 09:47:15,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:15,561 INFO L87 Difference]: Start difference. First operand 43491 states and 57496 transitions. Second operand 6 states. [2020-12-22 09:47:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:18,407 INFO L93 Difference]: Finished difference Result 66813 states and 88066 transitions. [2020-12-22 09:47:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:18,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:18,437 INFO L225 Difference]: With dead ends: 66813 [2020-12-22 09:47:18,437 INFO L226 Difference]: Without dead ends: 24895 [2020-12-22 09:47:18,451 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 09:47:18,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24895 states. [2020-12-22 09:47:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24895 to 24895. [2020-12-22 09:47:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24895 states. [2020-12-22 09:47:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24895 states to 24895 states and 32661 transitions. [2020-12-22 09:47:20,820 INFO L78 Accepts]: Start accepts. Automaton has 24895 states and 32661 transitions. Word has length 81 [2020-12-22 09:47:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:20,820 INFO L481 AbstractCegarLoop]: Abstraction has 24895 states and 32661 transitions. [2020-12-22 09:47:20,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 24895 states and 32661 transitions. [2020-12-22 09:47:20,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:20,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:20,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:20,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:47:20,823 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:47:20,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:20,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849653411] [2020-12-22 09:47:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:47:20,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849653411] [2020-12-22 09:47:20,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:20,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:20,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397532301] [2020-12-22 09:47:20,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:20,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:20,904 INFO L87 Difference]: Start difference. First operand 24895 states and 32661 transitions. Second operand 6 states. [2020-12-22 09:47:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:23,017 INFO L93 Difference]: Finished difference Result 43465 states and 56796 transitions. [2020-12-22 09:47:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:23,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:23,038 INFO L225 Difference]: With dead ends: 43465 [2020-12-22 09:47:23,038 INFO L226 Difference]: Without dead ends: 20125 [2020-12-22 09:47:23,047 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 09:47:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20125 states. [2020-12-22 09:47:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20125 to 20125. [2020-12-22 09:47:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20125 states. [2020-12-22 09:47:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 26339 transitions. [2020-12-22 09:47:24,981 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 26339 transitions. Word has length 81 [2020-12-22 09:47:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:24,981 INFO L481 AbstractCegarLoop]: Abstraction has 20125 states and 26339 transitions. [2020-12-22 09:47:24,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 26339 transitions. [2020-12-22 09:47:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:24,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:24,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:24,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:47:24,983 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:47:24,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:24,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617377978] [2020-12-22 09:47:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:25,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617377978] [2020-12-22 09:47:25,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:25,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:25,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840118431] [2020-12-22 09:47:25,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:25,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:25,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:25,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:25,034 INFO L87 Difference]: Start difference. First operand 20125 states and 26339 transitions. Second operand 3 states. [2020-12-22 09:47:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:26,039 INFO L93 Difference]: Finished difference Result 29501 states and 38309 transitions. [2020-12-22 09:47:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:26,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:47:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:26,053 INFO L225 Difference]: With dead ends: 29501 [2020-12-22 09:47:26,054 INFO L226 Difference]: Without dead ends: 10931 [2020-12-22 09:47:26,064 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 09:47:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2020-12-22 09:47:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 10929. [2020-12-22 09:47:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10929 states. [2020-12-22 09:47:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10929 states to 10929 states and 14261 transitions. [2020-12-22 09:47:27,026 INFO L78 Accepts]: Start accepts. Automaton has 10929 states and 14261 transitions. Word has length 82 [2020-12-22 09:47:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:27,027 INFO L481 AbstractCegarLoop]: Abstraction has 10929 states and 14261 transitions. [2020-12-22 09:47:27,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 10929 states and 14261 transitions. [2020-12-22 09:47:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:27,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:27,029 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 09:47:27,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:47:27,029 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:47:27,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:27,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760811575] [2020-12-22 09:47:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:27,592 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 09:47:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760811575] [2020-12-22 09:47:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579534860] [2020-12-22 09:47:27,593 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 09:47:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:27,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:47:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:28,778 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 09:47:29,633 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:47:29,977 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:47:30,209 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:47:30,492 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:47:30,509 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:47:30,899 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:47:31,193 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:47:31,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:47:31,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:31,253 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:31,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:31,264 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:47:31,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:31,278 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:47:31,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:32,177 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:47:32,640 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:47:33,121 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:47:33,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:33,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:47:36,750 WARN L197 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:47:37,359 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 09:47:37,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:37,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:47:37,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134380314] [2020-12-22 09:47:37,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:47:37,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:37,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:47:37,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:47:37,362 INFO L87 Difference]: Start difference. First operand 10929 states and 14261 transitions. Second operand 39 states. [2020-12-22 09:47:38,902 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:47:39,107 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:47:39,348 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:47:39,693 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:47:40,184 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:47:40,559 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:47:40,936 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:47:41,329 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:47:41,829 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:47:42,339 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:47:42,823 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:47:43,348 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:47:43,858 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:47:44,503 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:47:45,231 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:47:46,528 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:47:47,195 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:47:48,384 WARN L197 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:47:49,196 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:47:49,789 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:47:50,286 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:47:50,508 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:47:51,075 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:47:51,518 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:47:51,914 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:47:52,113 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-22 09:47:52,305 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:47:53,910 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:47:54,142 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:47:54,567 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:47:55,775 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:47:56,422 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:47:56,914 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:47:57,325 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:48:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:01,301 INFO L93 Difference]: Finished difference Result 24470 states and 30890 transitions. [2020-12-22 09:48:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:48:01,302 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:48:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:01,322 INFO L225 Difference]: With dead ends: 24470 [2020-12-22 09:48:01,322 INFO L226 Difference]: Without dead ends: 21060 [2020-12-22 09:48:01,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:48:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21060 states. [2020-12-22 09:48:02,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21060 to 10381. [2020-12-22 09:48:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10381 states. [2020-12-22 09:48:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10381 states to 10381 states and 13533 transitions. [2020-12-22 09:48:02,541 INFO L78 Accepts]: Start accepts. Automaton has 10381 states and 13533 transitions. Word has length 83 [2020-12-22 09:48:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:02,542 INFO L481 AbstractCegarLoop]: Abstraction has 10381 states and 13533 transitions. [2020-12-22 09:48:02,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:48:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10381 states and 13533 transitions. [2020-12-22 09:48:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:02,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:02,543 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 09:48:02,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:48:02,744 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:48:02,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:02,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890784675] [2020-12-22 09:48:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:03,244 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:48:03,559 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 09:48:03,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890784675] [2020-12-22 09:48:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96185954] [2020-12-22 09:48:03,560 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 09:48:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:48:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:04,685 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:05,037 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:48:05,638 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:48:05,979 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:48:05,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:06,372 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:48:06,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:06,686 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:06,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:07,053 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:48:07,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:07,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:07,311 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:07,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:07,897 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:48:08,576 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:48:08,660 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 09:48:08,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:08,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:48:08,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082507737] [2020-12-22 09:48:08,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:48:08,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:08,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:48:08,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:48:08,663 INFO L87 Difference]: Start difference. First operand 10381 states and 13533 transitions. Second operand 37 states. [2020-12-22 09:48:10,035 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:48:10,282 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-12-22 09:48:10,622 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-22 09:48:10,921 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-12-22 09:48:11,280 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-22 09:48:11,734 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-22 09:48:12,217 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:48:12,732 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-12-22 09:48:13,287 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:48:13,825 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:14,345 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:14,929 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 09:48:15,735 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-12-22 09:48:16,445 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-12-22 09:48:16,947 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:48:17,436 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-12-22 09:48:17,764 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:48:18,703 WARN L197 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-12-22 09:48:19,172 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-12-22 09:48:20,169 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-22 09:48:21,165 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:48:21,673 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 09:48:22,149 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:48:22,690 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:48:23,075 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:48:23,539 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-12-22 09:48:24,060 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 09:48:24,681 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:48:25,054 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:48:25,678 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-12-22 09:48:27,111 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38