/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.5.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:56:31,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:56:31,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:56:31,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:56:31,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:56:31,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:56:31,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:56:31,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:56:31,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:56:31,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:56:31,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:56:31,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:56:31,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:56:31,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:56:31,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:56:31,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:56:31,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:56:31,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:56:31,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:56:31,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:56:31,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:56:31,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:56:31,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:56:31,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:56:31,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:56:31,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:56:31,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:56:31,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:56:31,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:56:31,200 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:56:31,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:56:31,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:56:31,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:56:31,203 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:56:31,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:56:31,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:56:31,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:56:31,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:56:31,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:56:31,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:56:31,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:56:31,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:56:31,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:56:31,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:56:31,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:56:31,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:56:31,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:56:31,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:56:31,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:56:31,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:56:31,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:56:31,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:56:31,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:56:31,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:56:31,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:56:31,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:56:31,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:56:31,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:56:31,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:56:31,607 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:56:31,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:56:31,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d673f06/10d5014967334a78b973cf79453681a9/FLAG6f57e5168 [2020-12-22 09:56:32,719 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:56:32,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:56:32,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d673f06/10d5014967334a78b973cf79453681a9/FLAG6f57e5168 [2020-12-22 09:56:33,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d673f06/10d5014967334a78b973cf79453681a9 [2020-12-22 09:56:33,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:56:33,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:56:33,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:33,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:56:33,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:56:33,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:33,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad83744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:33, skipping insertion in model container [2020-12-22 09:56:33,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:56:33" (1/1) ... [2020-12-22 09:56:33,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:56:33,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:56:33,885 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.5.ufo.UNBOUNDED.pals+Problem12_label01.c[11758,11771] [2020-12-22 09:56:33,956 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.5.ufo.UNBOUNDED.pals+Problem12_label01.c[17070,17083] [2020-12-22 09:56:34,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:34,961 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:56:35,037 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.5.ufo.UNBOUNDED.pals+Problem12_label01.c[11758,11771] [2020-12-22 09:56:35,054 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.5.ufo.UNBOUNDED.pals+Problem12_label01.c[17070,17083] [2020-12-22 09:56:35,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:56:35,768 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:56:35,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35 WrapperNode [2020-12-22 09:56:35,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:56:35,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:35,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:56:35,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:56:35,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:35,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:56:36,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:56:36,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:56:36,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:56:36,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (1/1) ... [2020-12-22 09:56:36,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:56:36,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:56:36,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:56:36,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:56:36,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (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 09:56:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:56:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:56:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:56:37,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:56:42,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:56:42,645 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:56:42,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:42 BoogieIcfgContainer [2020-12-22 09:56:42,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:56:42,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:56:42,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:56:42,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:56:42,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:56:33" (1/3) ... [2020-12-22 09:56:42,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a20d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:42, skipping insertion in model container [2020-12-22 09:56:42,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:56:35" (2/3) ... [2020-12-22 09:56:42,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a20d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:56:42, skipping insertion in model container [2020-12-22 09:56:42,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:56:42" (3/3) ... [2020-12-22 09:56:42,658 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:56:42,664 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:56:42,671 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:56:42,690 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:56:42,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:56:42,744 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:56:42,744 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:56:42,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:56:42,745 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:56:42,745 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:56:42,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:56:42,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:56:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:56:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:56:42,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:42,807 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] [2020-12-22 09:56:42,807 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:42,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:42,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:56:42,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:42,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023048619] [2020-12-22 09:56:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:43,144 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 09:56:43,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023048619] [2020-12-22 09:56:43,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:43,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:43,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426419679] [2020-12-22 09:56:43,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:56:43,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:56:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:56:43,174 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:56:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:43,265 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:56:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:56:43,267 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:56:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:43,293 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:56:43,293 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:56:43,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:56:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:56:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:56:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:56:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:56:43,466 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:56:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:43,467 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:56:43,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:56:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:56:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:56:43,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:43,469 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] [2020-12-22 09:56:43,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:56:43,470 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:56:43,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:43,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6158658] [2020-12-22 09:56:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:43,605 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 09:56:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6158658] [2020-12-22 09:56:43,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:43,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:43,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900493741] [2020-12-22 09:56:43,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:43,611 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:56:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:43,762 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:56:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:56:43,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:56:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:43,772 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:56:43,772 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:56:43,774 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 09:56:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:56:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:56:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:56:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:56:43,809 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:56:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:43,810 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:56:43,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:56:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:56:43,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:43,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:43,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:56:43,817 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash 229544309, now seen corresponding path program 1 times [2020-12-22 09:56:43,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:43,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508649042] [2020-12-22 09:56:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:44,002 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 09:56:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508649042] [2020-12-22 09:56:44,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:44,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:44,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412585549] [2020-12-22 09:56:44,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:44,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:44,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:44,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:44,006 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 3 states. [2020-12-22 09:56:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:50,181 INFO L93 Difference]: Finished difference Result 2348 states and 4433 transitions. [2020-12-22 09:56:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:50,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 09:56:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:50,193 INFO L225 Difference]: With dead ends: 2348 [2020-12-22 09:56:50,193 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:56:50,195 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 09:56:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:56:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:56:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:56:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2935 transitions. [2020-12-22 09:56:50,285 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2935 transitions. Word has length 48 [2020-12-22 09:56:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:50,286 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2935 transitions. [2020-12-22 09:56:50,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2935 transitions. [2020-12-22 09:56:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:50,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:50,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:50,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:56:50,289 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:56:50,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:50,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248267633] [2020-12-22 09:56:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:50,430 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 09:56:50,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248267633] [2020-12-22 09:56:50,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:50,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:50,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272197242] [2020-12-22 09:56:50,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:50,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:50,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:50,433 INFO L87 Difference]: Start difference. First operand 1595 states and 2935 transitions. Second operand 3 states. [2020-12-22 09:56:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:50,491 INFO L93 Difference]: Finished difference Result 1695 states and 3093 transitions. [2020-12-22 09:56:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:50,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:50,502 INFO L225 Difference]: With dead ends: 1695 [2020-12-22 09:56:50,502 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 09:56:50,503 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 09:56:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 09:56:50,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 09:56:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 09:56:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 3007 transitions. [2020-12-22 09:56:50,544 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 3007 transitions. Word has length 64 [2020-12-22 09:56:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:50,545 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 3007 transitions. [2020-12-22 09:56:50,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 3007 transitions. [2020-12-22 09:56:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:50,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:50,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:50,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:56:50,547 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:50,548 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:56:50,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:50,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779189016] [2020-12-22 09:56:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:50,681 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 09:56:50,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779189016] [2020-12-22 09:56:50,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:50,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:50,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417985785] [2020-12-22 09:56:50,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:50,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:50,684 INFO L87 Difference]: Start difference. First operand 1640 states and 3007 transitions. Second operand 7 states. [2020-12-22 09:56:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:50,990 INFO L93 Difference]: Finished difference Result 2620 states and 4567 transitions. [2020-12-22 09:56:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:56:50,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:56:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:51,011 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 09:56:51,011 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:56:51,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:56:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:56:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1736. [2020-12-22 09:56:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-12-22 09:56:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 3158 transitions. [2020-12-22 09:56:51,082 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 3158 transitions. Word has length 64 [2020-12-22 09:56:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:51,082 INFO L481 AbstractCegarLoop]: Abstraction has 1736 states and 3158 transitions. [2020-12-22 09:56:51,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 3158 transitions. [2020-12-22 09:56:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:51,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:51,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:51,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:56:51,086 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:51,087 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:56:51,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:51,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207258585] [2020-12-22 09:56:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:51,210 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 09:56:51,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207258585] [2020-12-22 09:56:51,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:51,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:51,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313422197] [2020-12-22 09:56:51,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:51,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:51,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:51,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:51,215 INFO L87 Difference]: Start difference. First operand 1736 states and 3158 transitions. Second operand 3 states. [2020-12-22 09:56:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:51,291 INFO L93 Difference]: Finished difference Result 2102 states and 3734 transitions. [2020-12-22 09:56:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:51,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:51,305 INFO L225 Difference]: With dead ends: 2102 [2020-12-22 09:56:51,305 INFO L226 Difference]: Without dead ends: 1908 [2020-12-22 09:56:51,307 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 09:56:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-12-22 09:56:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1902. [2020-12-22 09:56:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:56:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3412 transitions. [2020-12-22 09:56:51,381 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3412 transitions. Word has length 66 [2020-12-22 09:56:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:51,382 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3412 transitions. [2020-12-22 09:56:51,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3412 transitions. [2020-12-22 09:56:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:51,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:51,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:51,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:56:51,386 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:56:51,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:51,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111553542] [2020-12-22 09:56:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:51,644 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 09:56:51,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111553542] [2020-12-22 09:56:51,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:51,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302541144] [2020-12-22 09:56:51,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:51,649 INFO L87 Difference]: Start difference. First operand 1902 states and 3412 transitions. Second operand 7 states. [2020-12-22 09:56:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:51,906 INFO L93 Difference]: Finished difference Result 2264 states and 3974 transitions. [2020-12-22 09:56:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:51,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:56:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:51,918 INFO L225 Difference]: With dead ends: 2264 [2020-12-22 09:56:51,918 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 09:56:51,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:56:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 09:56:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1902. [2020-12-22 09:56:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:56:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3408 transitions. [2020-12-22 09:56:51,978 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3408 transitions. Word has length 66 [2020-12-22 09:56:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:51,979 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3408 transitions. [2020-12-22 09:56:51,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3408 transitions. [2020-12-22 09:56:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:51,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:51,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:51,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:56:51,981 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:56:51,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:51,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766495487] [2020-12-22 09:56:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:52,039 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 09:56:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766495487] [2020-12-22 09:56:52,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:52,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:52,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794852117] [2020-12-22 09:56:52,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:52,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:52,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:52,042 INFO L87 Difference]: Start difference. First operand 1902 states and 3408 transitions. Second operand 3 states. [2020-12-22 09:56:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:52,121 INFO L93 Difference]: Finished difference Result 2574 states and 4442 transitions. [2020-12-22 09:56:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:52,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:52,136 INFO L225 Difference]: With dead ends: 2574 [2020-12-22 09:56:52,136 INFO L226 Difference]: Without dead ends: 2214 [2020-12-22 09:56:52,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2020-12-22 09:56:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2212. [2020-12-22 09:56:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2020-12-22 09:56:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3876 transitions. [2020-12-22 09:56:52,232 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3876 transitions. Word has length 66 [2020-12-22 09:56:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:52,232 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 3876 transitions. [2020-12-22 09:56:52,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3876 transitions. [2020-12-22 09:56:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:52,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:52,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:52,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:56:52,235 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:52,235 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:56:52,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:52,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000080917] [2020-12-22 09:56:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:52,311 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 09:56:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000080917] [2020-12-22 09:56:52,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:52,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:52,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575773663] [2020-12-22 09:56:52,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:52,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:52,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:52,317 INFO L87 Difference]: Start difference. First operand 2212 states and 3876 transitions. Second operand 3 states. [2020-12-22 09:56:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:52,439 INFO L93 Difference]: Finished difference Result 3456 states and 5766 transitions. [2020-12-22 09:56:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:52,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:52,455 INFO L225 Difference]: With dead ends: 3456 [2020-12-22 09:56:52,455 INFO L226 Difference]: Without dead ends: 2786 [2020-12-22 09:56:52,457 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 09:56:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-12-22 09:56:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2784. [2020-12-22 09:56:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-12-22 09:56:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4724 transitions. [2020-12-22 09:56:52,646 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4724 transitions. Word has length 66 [2020-12-22 09:56:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:52,646 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 4724 transitions. [2020-12-22 09:56:52,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4724 transitions. [2020-12-22 09:56:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:52,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:52,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:52,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:56:52,648 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:56:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:52,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731821038] [2020-12-22 09:56:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:52,705 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 09:56:52,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731821038] [2020-12-22 09:56:52,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:52,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:52,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915557307] [2020-12-22 09:56:52,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:52,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:52,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:52,707 INFO L87 Difference]: Start difference. First operand 2784 states and 4724 transitions. Second operand 3 states. [2020-12-22 09:56:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:52,890 INFO L93 Difference]: Finished difference Result 5076 states and 8150 transitions. [2020-12-22 09:56:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:52,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:52,911 INFO L225 Difference]: With dead ends: 5076 [2020-12-22 09:56:52,912 INFO L226 Difference]: Without dead ends: 3834 [2020-12-22 09:56:52,917 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 09:56:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2020-12-22 09:56:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2020-12-22 09:56:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3832 states. [2020-12-22 09:56:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 6244 transitions. [2020-12-22 09:56:53,187 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 6244 transitions. Word has length 66 [2020-12-22 09:56:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:53,187 INFO L481 AbstractCegarLoop]: Abstraction has 3832 states and 6244 transitions. [2020-12-22 09:56:53,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 6244 transitions. [2020-12-22 09:56:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:53,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:53,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:53,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:56:53,189 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:56:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:53,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559901023] [2020-12-22 09:56:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:53,329 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 09:56:53,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559901023] [2020-12-22 09:56:53,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:53,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:53,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819993383] [2020-12-22 09:56:53,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:53,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:53,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:53,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:53,334 INFO L87 Difference]: Start difference. First operand 3832 states and 6244 transitions. Second operand 5 states. [2020-12-22 09:56:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:53,731 INFO L93 Difference]: Finished difference Result 5558 states and 8746 transitions. [2020-12-22 09:56:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:53,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:56:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:53,775 INFO L225 Difference]: With dead ends: 5558 [2020-12-22 09:56:53,775 INFO L226 Difference]: Without dead ends: 5556 [2020-12-22 09:56:53,779 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 09:56:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2020-12-22 09:56:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3928. [2020-12-22 09:56:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-12-22 09:56:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6324 transitions. [2020-12-22 09:56:54,096 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6324 transitions. Word has length 67 [2020-12-22 09:56:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:54,097 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 6324 transitions. [2020-12-22 09:56:54,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6324 transitions. [2020-12-22 09:56:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:56:54,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:54,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:54,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:56:54,099 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:56:54,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:54,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557840897] [2020-12-22 09:56:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:54,179 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 09:56:54,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557840897] [2020-12-22 09:56:54,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:54,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:54,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869340730] [2020-12-22 09:56:54,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:54,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:54,182 INFO L87 Difference]: Start difference. First operand 3928 states and 6324 transitions. Second operand 3 states. [2020-12-22 09:56:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:54,485 INFO L93 Difference]: Finished difference Result 6367 states and 9914 transitions. [2020-12-22 09:56:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:54,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:56:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:54,499 INFO L225 Difference]: With dead ends: 6367 [2020-12-22 09:56:54,500 INFO L226 Difference]: Without dead ends: 5020 [2020-12-22 09:56:54,504 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 09:56:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2020-12-22 09:56:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2020-12-22 09:56:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:56:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7878 transitions. [2020-12-22 09:56:54,837 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7878 transitions. Word has length 68 [2020-12-22 09:56:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:54,837 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7878 transitions. [2020-12-22 09:56:54,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7878 transitions. [2020-12-22 09:56:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:56:54,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:54,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:54,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:56:54,842 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:54,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:56:54,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:54,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079836735] [2020-12-22 09:56:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:56:54,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079836735] [2020-12-22 09:56:54,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:54,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:54,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836724098] [2020-12-22 09:56:54,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:54,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:54,994 INFO L87 Difference]: Start difference. First operand 5018 states and 7878 transitions. Second operand 7 states. [2020-12-22 09:56:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:56,433 INFO L93 Difference]: Finished difference Result 23094 states and 33980 transitions. [2020-12-22 09:56:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:56,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:56:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:56,479 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:56:56,479 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:56:56,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:56:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:56:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:56:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12854 transitions. [2020-12-22 09:56:57,161 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12854 transitions. Word has length 94 [2020-12-22 09:56:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:57,162 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12854 transitions. [2020-12-22 09:56:57,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12854 transitions. [2020-12-22 09:56:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:56:57,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:57,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:57,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:56:57,166 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:57,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:57,167 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:56:57,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:57,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642986825] [2020-12-22 09:56:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:56:57,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642986825] [2020-12-22 09:56:57,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:57,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:57,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040672676] [2020-12-22 09:56:57,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:57,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:57,296 INFO L87 Difference]: Start difference. First operand 8490 states and 12854 transitions. Second operand 7 states. [2020-12-22 09:56:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:58,679 INFO L93 Difference]: Finished difference Result 26566 states and 38956 transitions. [2020-12-22 09:56:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:58,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:56:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:58,734 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:56:58,734 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:56:58,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:56:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:56:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:56:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 20278 transitions. [2020-12-22 09:56:59,788 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 20278 transitions. Word has length 94 [2020-12-22 09:56:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:59,788 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 20278 transitions. [2020-12-22 09:56:59,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 20278 transitions. [2020-12-22 09:56:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:56:59,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:59,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:59,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:56:59,797 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:59,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:59,798 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:56:59,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:59,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939003276] [2020-12-22 09:56:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:56:59,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939003276] [2020-12-22 09:56:59,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:59,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:59,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077038091] [2020-12-22 09:56:59,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:59,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:59,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:59,925 INFO L87 Difference]: Start difference. First operand 13706 states and 20278 transitions. Second operand 7 states. [2020-12-22 09:57:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:01,349 INFO L93 Difference]: Finished difference Result 30038 states and 43932 transitions. [2020-12-22 09:57:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:01,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:01,412 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:57:01,412 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:57:01,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:57:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:57:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:57:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 25254 transitions. [2020-12-22 09:57:03,009 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 25254 transitions. Word has length 94 [2020-12-22 09:57:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:03,010 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 25254 transitions. [2020-12-22 09:57:03,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 25254 transitions. [2020-12-22 09:57:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:03,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:03,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:03,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:57:03,017 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:03,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:57:03,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:03,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214391618] [2020-12-22 09:57:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:57:03,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214391618] [2020-12-22 09:57:03,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:03,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:03,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540738016] [2020-12-22 09:57:03,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:03,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:03,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:03,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:03,176 INFO L87 Difference]: Start difference. First operand 17178 states and 25254 transitions. Second operand 7 states. [2020-12-22 09:57:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:04,638 INFO L93 Difference]: Finished difference Result 33510 states and 48908 transitions. [2020-12-22 09:57:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:04,638 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:04,702 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:57:04,702 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:57:04,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:57:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:57:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:57:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 30230 transitions. [2020-12-22 09:57:06,177 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 30230 transitions. Word has length 94 [2020-12-22 09:57:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:06,178 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 30230 transitions. [2020-12-22 09:57:06,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 30230 transitions. [2020-12-22 09:57:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:06,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:06,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:06,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:57:06,190 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:06,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:57:06,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:06,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279597561] [2020-12-22 09:57:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:06,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279597561] [2020-12-22 09:57:06,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:06,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:06,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094909787] [2020-12-22 09:57:06,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:06,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:06,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:06,382 INFO L87 Difference]: Start difference. First operand 20650 states and 30230 transitions. Second operand 3 states. [2020-12-22 09:57:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:07,621 INFO L93 Difference]: Finished difference Result 34059 states and 49627 transitions. [2020-12-22 09:57:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:07,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:57:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:07,652 INFO L225 Difference]: With dead ends: 34059 [2020-12-22 09:57:07,652 INFO L226 Difference]: Without dead ends: 14953 [2020-12-22 09:57:07,680 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 09:57:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14953 states. [2020-12-22 09:57:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14953 to 14951. [2020-12-22 09:57:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14951 states. [2020-12-22 09:57:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 22072 transitions. [2020-12-22 09:57:08,628 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 22072 transitions. Word has length 96 [2020-12-22 09:57:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:08,628 INFO L481 AbstractCegarLoop]: Abstraction has 14951 states and 22072 transitions. [2020-12-22 09:57:08,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 22072 transitions. [2020-12-22 09:57:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:57:08,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:08,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:08,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:57:08,636 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:57:08,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:08,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262457214] [2020-12-22 09:57:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262457214] [2020-12-22 09:57:08,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:08,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:08,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139708470] [2020-12-22 09:57:08,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:08,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:08,765 INFO L87 Difference]: Start difference. First operand 14951 states and 22072 transitions. Second operand 7 states. [2020-12-22 09:57:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:09,997 INFO L93 Difference]: Finished difference Result 27123 states and 39678 transitions. [2020-12-22 09:57:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:09,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:57:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:10,043 INFO L225 Difference]: With dead ends: 27123 [2020-12-22 09:57:10,043 INFO L226 Difference]: Without dead ends: 24689 [2020-12-22 09:57:10,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:57:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24689 states. [2020-12-22 09:57:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24689 to 17383. [2020-12-22 09:57:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17383 states. [2020-12-22 09:57:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17383 states to 17383 states and 25560 transitions. [2020-12-22 09:57:11,327 INFO L78 Accepts]: Start accepts. Automaton has 17383 states and 25560 transitions. Word has length 96 [2020-12-22 09:57:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:11,327 INFO L481 AbstractCegarLoop]: Abstraction has 17383 states and 25560 transitions. [2020-12-22 09:57:11,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 17383 states and 25560 transitions. [2020-12-22 09:57:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:11,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:11,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:57:11,332 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:57:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:11,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199255386] [2020-12-22 09:57:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:11,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199255386] [2020-12-22 09:57:11,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:11,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:11,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096802317] [2020-12-22 09:57:11,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:11,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:11,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:11,403 INFO L87 Difference]: Start difference. First operand 17383 states and 25560 transitions. Second operand 3 states. [2020-12-22 09:57:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:11,897 INFO L93 Difference]: Finished difference Result 25291 states and 36898 transitions. [2020-12-22 09:57:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:11,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:11,914 INFO L225 Difference]: With dead ends: 25291 [2020-12-22 09:57:11,914 INFO L226 Difference]: Without dead ends: 9481 [2020-12-22 09:57:11,934 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 09:57:11,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9481 states. [2020-12-22 09:57:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9481 to 9479. [2020-12-22 09:57:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9479 states. [2020-12-22 09:57:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9479 states to 9479 states and 14120 transitions. [2020-12-22 09:57:12,752 INFO L78 Accepts]: Start accepts. Automaton has 9479 states and 14120 transitions. Word has length 97 [2020-12-22 09:57:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:12,752 INFO L481 AbstractCegarLoop]: Abstraction has 9479 states and 14120 transitions. [2020-12-22 09:57:12,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9479 states and 14120 transitions. [2020-12-22 09:57:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:12,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:12,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:57:12,756 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:57:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:12,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838498096] [2020-12-22 09:57:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:12,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838498096] [2020-12-22 09:57:12,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:12,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:12,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452611299] [2020-12-22 09:57:12,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:12,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:12,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:12,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:12,819 INFO L87 Difference]: Start difference. First operand 9479 states and 14120 transitions. Second operand 3 states. [2020-12-22 09:57:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:13,085 INFO L93 Difference]: Finished difference Result 13435 states and 19738 transitions. [2020-12-22 09:57:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:13,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:13,091 INFO L225 Difference]: With dead ends: 13435 [2020-12-22 09:57:13,091 INFO L226 Difference]: Without dead ends: 5529 [2020-12-22 09:57:13,103 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 09:57:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2020-12-22 09:57:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5527. [2020-12-22 09:57:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5527 states. [2020-12-22 09:57:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 8452 transitions. [2020-12-22 09:57:13,469 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 8452 transitions. Word has length 97 [2020-12-22 09:57:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:13,470 INFO L481 AbstractCegarLoop]: Abstraction has 5527 states and 8452 transitions. [2020-12-22 09:57:13,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 8452 transitions. [2020-12-22 09:57:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:13,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:13,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:13,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:57:13,473 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:57:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:13,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112337515] [2020-12-22 09:57:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112337515] [2020-12-22 09:57:13,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:13,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:13,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581549554] [2020-12-22 09:57:13,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:13,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:13,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:13,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:13,546 INFO L87 Difference]: Start difference. First operand 5527 states and 8452 transitions. Second operand 3 states. [2020-12-22 09:57:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:13,740 INFO L93 Difference]: Finished difference Result 7507 states and 11236 transitions. [2020-12-22 09:57:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:13,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:57:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:13,746 INFO L225 Difference]: With dead ends: 7507 [2020-12-22 09:57:13,747 INFO L226 Difference]: Without dead ends: 3553 [2020-12-22 09:57:13,751 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 09:57:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2020-12-22 09:57:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3551. [2020-12-22 09:57:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3551 states. [2020-12-22 09:57:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 5644 transitions. [2020-12-22 09:57:14,004 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 5644 transitions. Word has length 97 [2020-12-22 09:57:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:14,005 INFO L481 AbstractCegarLoop]: Abstraction has 3551 states and 5644 transitions. [2020-12-22 09:57:14,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 5644 transitions. [2020-12-22 09:57:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:14,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:14,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:14,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:57:14,007 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:14,007 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:57:14,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:14,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834816647] [2020-12-22 09:57:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:14,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834816647] [2020-12-22 09:57:14,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768690365] [2020-12-22 09:57:14,472 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 09:57:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:57:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:57:15,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:15,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:57:15,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268792537] [2020-12-22 09:57:15,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:57:15,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:57:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:57:15,170 INFO L87 Difference]: Start difference. First operand 3551 states and 5644 transitions. Second operand 16 states. [2020-12-22 09:57:17,213 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:57:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:19,131 INFO L93 Difference]: Finished difference Result 14622 states and 20663 transitions. [2020-12-22 09:57:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:57:19,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:57:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:19,179 INFO L225 Difference]: With dead ends: 14622 [2020-12-22 09:57:19,179 INFO L226 Difference]: Without dead ends: 12644 [2020-12-22 09:57:19,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:57:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12644 states. [2020-12-22 09:57:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12644 to 9273. [2020-12-22 09:57:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9273 states. [2020-12-22 09:57:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9273 states to 9273 states and 13206 transitions. [2020-12-22 09:57:20,262 INFO L78 Accepts]: Start accepts. Automaton has 9273 states and 13206 transitions. Word has length 97 [2020-12-22 09:57:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:20,262 INFO L481 AbstractCegarLoop]: Abstraction has 9273 states and 13206 transitions. [2020-12-22 09:57:20,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:57:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9273 states and 13206 transitions. [2020-12-22 09:57:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:20,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:20,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:20,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:57:20,481 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:20,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:57:20,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:20,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780231149] [2020-12-22 09:57:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:20,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780231149] [2020-12-22 09:57:20,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376665489] [2020-12-22 09:57:20,826 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 09:57:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:21,237 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:21,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:21,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:57:21,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313780262] [2020-12-22 09:57:21,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:57:21,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:21,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:57:21,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:57:21,660 INFO L87 Difference]: Start difference. First operand 9273 states and 13206 transitions. Second operand 22 states. [2020-12-22 09:57:21,929 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 09:57:24,053 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:57:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:26,616 INFO L93 Difference]: Finished difference Result 40074 states and 54272 transitions. [2020-12-22 09:57:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:57:26,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:57:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:26,664 INFO L225 Difference]: With dead ends: 40074 [2020-12-22 09:57:26,664 INFO L226 Difference]: Without dead ends: 33571 [2020-12-22 09:57:26,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:57:26,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33571 states. [2020-12-22 09:57:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33571 to 21776. [2020-12-22 09:57:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21776 states. [2020-12-22 09:57:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21776 states to 21776 states and 29745 transitions. [2020-12-22 09:57:28,572 INFO L78 Accepts]: Start accepts. Automaton has 21776 states and 29745 transitions. Word has length 98 [2020-12-22 09:57:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:28,572 INFO L481 AbstractCegarLoop]: Abstraction has 21776 states and 29745 transitions. [2020-12-22 09:57:28,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:57:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 21776 states and 29745 transitions. [2020-12-22 09:57:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:57:28,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:28,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:28,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:57:28,792 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:57:28,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:28,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484608516] [2020-12-22 09:57:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:29,068 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 09:57:29,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484608516] [2020-12-22 09:57:29,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120480852] [2020-12-22 09:57:29,069 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 09:57:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:29,435 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:29,776 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 09:57:29,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:29,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:57:29,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018327908] [2020-12-22 09:57:29,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:57:29,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:57:29,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:57:29,778 INFO L87 Difference]: Start difference. First operand 21776 states and 29745 transitions. Second operand 17 states. [2020-12-22 09:57:30,671 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:32,726 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:33,841 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:38,269 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:56,393 INFO L93 Difference]: Finished difference Result 216331 states and 287555 transitions. [2020-12-22 09:57:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:57:56,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:57:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:56,713 INFO L225 Difference]: With dead ends: 216331 [2020-12-22 09:57:56,713 INFO L226 Difference]: Without dead ends: 196774 [2020-12-22 09:57:56,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:57:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196774 states. [2020-12-22 09:58:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196774 to 112049. [2020-12-22 09:58:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112049 states. [2020-12-22 09:58:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112049 states to 112049 states and 147128 transitions. [2020-12-22 09:58:09,857 INFO L78 Accepts]: Start accepts. Automaton has 112049 states and 147128 transitions. Word has length 98 [2020-12-22 09:58:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:09,857 INFO L481 AbstractCegarLoop]: Abstraction has 112049 states and 147128 transitions. [2020-12-22 09:58:09,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:58:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 112049 states and 147128 transitions. [2020-12-22 09:58:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:09,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:09,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:10,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:58:10,080 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:58:10,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:10,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233154263] [2020-12-22 09:58:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:58:10,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233154263] [2020-12-22 09:58:10,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:10,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:10,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110999616] [2020-12-22 09:58:10,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:10,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:10,184 INFO L87 Difference]: Start difference. First operand 112049 states and 147128 transitions. Second operand 6 states. [2020-12-22 09:58:21,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:21,179 INFO L93 Difference]: Finished difference Result 212494 states and 278909 transitions. [2020-12-22 09:58:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:21,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:21,334 INFO L225 Difference]: With dead ends: 212494 [2020-12-22 09:58:21,334 INFO L226 Difference]: Without dead ends: 102190 [2020-12-22 09:58:21,400 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 09:58:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102190 states. [2020-12-22 09:58:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102190 to 102190. [2020-12-22 09:58:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102190 states. [2020-12-22 09:58:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102190 states to 102190 states and 133367 transitions. [2020-12-22 09:58:32,180 INFO L78 Accepts]: Start accepts. Automaton has 102190 states and 133367 transitions. Word has length 98 [2020-12-22 09:58:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:32,180 INFO L481 AbstractCegarLoop]: Abstraction has 102190 states and 133367 transitions. [2020-12-22 09:58:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:58:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 102190 states and 133367 transitions. [2020-12-22 09:58:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:32,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:32,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:32,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:58:32,185 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:58:32,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:32,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832248344] [2020-12-22 09:58:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:58:32,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832248344] [2020-12-22 09:58:32,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:32,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:32,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441938850] [2020-12-22 09:58:32,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:32,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:32,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:32,302 INFO L87 Difference]: Start difference. First operand 102190 states and 133367 transitions. Second operand 6 states. [2020-12-22 09:58:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:40,942 INFO L93 Difference]: Finished difference Result 175728 states and 228818 transitions. [2020-12-22 09:58:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:40,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:41,038 INFO L225 Difference]: With dead ends: 175728 [2020-12-22 09:58:41,038 INFO L226 Difference]: Without dead ends: 75449 [2020-12-22 09:58:41,092 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 09:58:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75449 states. [2020-12-22 09:58:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75449 to 75449. [2020-12-22 09:58:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75449 states. [2020-12-22 09:58:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75449 states to 75449 states and 97295 transitions. [2020-12-22 09:58:49,349 INFO L78 Accepts]: Start accepts. Automaton has 75449 states and 97295 transitions. Word has length 98 [2020-12-22 09:58:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:49,349 INFO L481 AbstractCegarLoop]: Abstraction has 75449 states and 97295 transitions. [2020-12-22 09:58:49,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:58:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 75449 states and 97295 transitions. [2020-12-22 09:58:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:49,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:49,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:49,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:58:49,353 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:49,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:58:49,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:49,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782630973] [2020-12-22 09:58:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:49,442 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 09:58:49,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782630973] [2020-12-22 09:58:49,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:49,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:58:49,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404515656] [2020-12-22 09:58:49,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:58:49,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:58:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:58:49,444 INFO L87 Difference]: Start difference. First operand 75449 states and 97295 transitions. Second operand 6 states. [2020-12-22 09:58:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:56,116 INFO L93 Difference]: Finished difference Result 131239 states and 168959 transitions. [2020-12-22 09:58:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:58:56,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:58:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:56,187 INFO L225 Difference]: With dead ends: 131239 [2020-12-22 09:58:56,187 INFO L226 Difference]: Without dead ends: 57419 [2020-12-22 09:58:56,221 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 09:58:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57419 states. [2020-12-22 09:59:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57419 to 57419. [2020-12-22 09:59:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57419 states. [2020-12-22 09:59:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57419 states to 57419 states and 73989 transitions. [2020-12-22 09:59:02,636 INFO L78 Accepts]: Start accepts. Automaton has 57419 states and 73989 transitions. Word has length 98 [2020-12-22 09:59:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:02,636 INFO L481 AbstractCegarLoop]: Abstraction has 57419 states and 73989 transitions. [2020-12-22 09:59:02,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57419 states and 73989 transitions. [2020-12-22 09:59:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:59:02,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:02,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:02,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:59:02,641 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:59:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:02,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267807026] [2020-12-22 09:59:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:02,725 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 09:59:02,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267807026] [2020-12-22 09:59:02,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:02,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:02,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763688095] [2020-12-22 09:59:02,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:02,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:02,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:02,729 INFO L87 Difference]: Start difference. First operand 57419 states and 73989 transitions. Second operand 6 states. [2020-12-22 09:59:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:08,628 INFO L93 Difference]: Finished difference Result 100473 states and 128892 transitions. [2020-12-22 09:59:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:08,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:59:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:08,677 INFO L225 Difference]: With dead ends: 100473 [2020-12-22 09:59:08,678 INFO L226 Difference]: Without dead ends: 44685 [2020-12-22 09:59:08,708 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 09:59:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44685 states. [2020-12-22 09:59:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44685 to 44685. [2020-12-22 09:59:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44685 states. [2020-12-22 09:59:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44685 states to 44685 states and 57232 transitions. [2020-12-22 09:59:13,780 INFO L78 Accepts]: Start accepts. Automaton has 44685 states and 57232 transitions. Word has length 99 [2020-12-22 09:59:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:13,781 INFO L481 AbstractCegarLoop]: Abstraction has 44685 states and 57232 transitions. [2020-12-22 09:59:13,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:13,781 INFO L276 IsEmpty]: Start isEmpty. Operand 44685 states and 57232 transitions. [2020-12-22 09:59:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:59:13,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:13,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:13,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:59:13,784 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:59:13,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:13,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554369703] [2020-12-22 09:59:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:14,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554369703] [2020-12-22 09:59:14,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685731163] [2020-12-22 09:59:14,038 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 09:59:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:59:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:14,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:59:14,773 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:59:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:15,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:15,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:59:15,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841052812] [2020-12-22 09:59:15,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:59:15,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:15,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:59:15,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:59:15,514 INFO L87 Difference]: Start difference. First operand 44685 states and 57232 transitions. Second operand 20 states. [2020-12-22 09:59:16,434 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:59:16,861 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:59:17,441 WARN L197 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:59:18,143 WARN L197 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:59:18,798 WARN L197 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:19,614 WARN L197 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:20,420 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:20,944 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:59:21,630 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:22,206 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:59:22,910 WARN L197 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:23,544 WARN L197 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:24,542 WARN L197 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:59:25,247 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:59:25,907 WARN L197 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:59:27,028 WARN L197 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:59:30,322 WARN L197 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:59:31,150 WARN L197 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 09:59:31,908 WARN L197 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:59:32,361 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:59:33,381 WARN L197 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:59:33,825 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:59:34,293 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:59:34,771 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:35,397 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:59:35,818 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:36,845 WARN L197 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 09:59:37,609 WARN L197 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:59:38,223 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 09:59:38,658 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:59:39,821 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:40,445 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:59:41,286 WARN L197 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:59:41,729 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:59:42,126 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:59:45,834 WARN L197 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 09:59:47,443 WARN L197 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 09:59:48,570 WARN L197 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:59:49,101 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:59:49,601 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:59:50,428 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 09:59:50,944 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:59:51,592 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:59:51,905 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:59:52,601 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:59:52,904 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:03,439 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:00:03,736 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 10:00:04,078 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 10:00:04,600 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:00:04,894 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 10:00:07,100 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:00:07,629 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:00:14,517 WARN L197 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 10:00:15,138 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 101