/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.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:00:50,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:00:50,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:00:50,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:00:50,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:00:50,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:00:50,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:00:50,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:00:50,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:00:50,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:00:50,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:00:50,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:00:50,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:00:50,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:00:50,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:00:50,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:00:50,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:00:50,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:00:50,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:00:50,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:00:50,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:00:50,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:00:50,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:00:50,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:00:50,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:00:50,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:00:50,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:00:50,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:00:50,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:00:50,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:00:50,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:00:50,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:00:50,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:00:50,663 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:00:50,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:00:50,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:00:50,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:00:50,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:00:50,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:00:50,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:00:50,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:00:50,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:00:50,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:00:50,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:00:50,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:00:50,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:00:50,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:50,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:00:50,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:00:50,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:00:50,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:00:50,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:00:50,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:00:50,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:00:50,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:00:51,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:00:51,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:00:51,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:00:51,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:00:51,096 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:00:51,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c [2020-12-22 10:00:51,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df0d22bd/faded0aaabdc4b89a0f4e5afe04fd5f0/FLAG4b798cae0 [2020-12-22 10:00:52,296 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:00:52,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c [2020-12-22 10:00:52,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df0d22bd/faded0aaabdc4b89a0f4e5afe04fd5f0/FLAG4b798cae0 [2020-12-22 10:00:52,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df0d22bd/faded0aaabdc4b89a0f4e5afe04fd5f0 [2020-12-22 10:00:52,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:00:52,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:00:52,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:52,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:00:52,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:00:52,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:52" (1/1) ... [2020-12-22 10:00:52,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b860b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:52, skipping insertion in model container [2020-12-22 10:00:52,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:52" (1/1) ... [2020-12-22 10:00:52,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:00:52,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:00:53,492 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.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c[15623,15636] [2020-12-22 10:00:53,590 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.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c[22316,22329] [2020-12-22 10:00:54,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:54,517 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:00:54,595 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.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c[15623,15636] [2020-12-22 10:00:54,608 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.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c[22316,22329] [2020-12-22 10:00:55,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:55,213 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:00:55,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55 WrapperNode [2020-12-22 10:00:55,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:55,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:55,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:00:55,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:00:55,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:55,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:55,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:55,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:00:55,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:00:55,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:00:55,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:55,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:55,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:55,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:56,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:56,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:56,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... [2020-12-22 10:00:56,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:00:56,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:00:56,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:00:56,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:00:56,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:00:56,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:00:56,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:00:56,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:01:01,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:01:01,865 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:01:01,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:01:01 BoogieIcfgContainer [2020-12-22 10:01:01,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:01:01,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:01:01,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:01:01,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:01:01,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:00:52" (1/3) ... [2020-12-22 10:01:01,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222c3e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:01:01, skipping insertion in model container [2020-12-22 10:01:01,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:55" (2/3) ... [2020-12-22 10:01:01,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222c3e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:01:01, skipping insertion in model container [2020-12-22 10:01:01,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:01:01" (3/3) ... [2020-12-22 10:01:01,879 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label05.c [2020-12-22 10:01:01,887 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:01:01,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:01:01,918 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:01:01,969 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:01:01,969 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:01:01,970 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:01:01,970 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:01:01,970 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:01:01,970 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:01:01,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:01:01,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:01:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:01:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:01:02,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:02,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:02,076 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:01:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:02,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176754833] [2020-12-22 10:01:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:02,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176754833] [2020-12-22 10:01:02,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:02,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:01:02,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019952004] [2020-12-22 10:01:02,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:01:02,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:01:02,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:01:02,562 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:01:02,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:02,687 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:01:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:01:02,689 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:01:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:02,745 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:01:02,746 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:01:02,759 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 10:01:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:01:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:01:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:01:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:01:02,867 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:01:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:02,868 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:01:02,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:01:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:01:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:01:02,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:02,874 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] [2020-12-22 10:01:02,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:01:02,876 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:01:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:02,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347287669] [2020-12-22 10:01:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:03,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347287669] [2020-12-22 10:01:03,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:03,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:01:03,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963044933] [2020-12-22 10:01:03,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:01:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:01:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:01:03,095 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:01:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:03,239 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:01:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:01:03,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:01:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:03,245 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:01:03,246 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:01:03,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:01:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:01:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:01:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:01:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:01:03,335 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:01:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:03,335 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:01:03,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:01:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:01:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:01:03,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:03,345 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] [2020-12-22 10:01:03,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:01:03,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -117834811, now seen corresponding path program 1 times [2020-12-22 10:01:03,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:03,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442318595] [2020-12-22 10:01:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:03,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442318595] [2020-12-22 10:01:03,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:03,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039635059] [2020-12-22 10:01:03,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:01:03,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:01:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:01:03,545 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 4 states. [2020-12-22 10:01:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:13,387 INFO L93 Difference]: Finished difference Result 3115 states and 5889 transitions. [2020-12-22 10:01:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:01:13,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 10:01:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:13,409 INFO L225 Difference]: With dead ends: 3115 [2020-12-22 10:01:13,409 INFO L226 Difference]: Without dead ends: 2362 [2020-12-22 10:01:13,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:01:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2020-12-22 10:01:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2020-12-22 10:01:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2362 states. [2020-12-22 10:01:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3556 transitions. [2020-12-22 10:01:13,481 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3556 transitions. Word has length 60 [2020-12-22 10:01:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:13,482 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 3556 transitions. [2020-12-22 10:01:13,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:01:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3556 transitions. [2020-12-22 10:01:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:01:13,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:13,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:13,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:01:13,484 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:01:13,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:13,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549014453] [2020-12-22 10:01:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:13,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549014453] [2020-12-22 10:01:13,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:13,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:13,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398361694] [2020-12-22 10:01:13,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:13,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:13,580 INFO L87 Difference]: Start difference. First operand 2362 states and 3556 transitions. Second operand 3 states. [2020-12-22 10:01:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:13,627 INFO L93 Difference]: Finished difference Result 2476 states and 3736 transitions. [2020-12-22 10:01:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:13,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:01:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:13,642 INFO L225 Difference]: With dead ends: 2476 [2020-12-22 10:01:13,642 INFO L226 Difference]: Without dead ends: 2416 [2020-12-22 10:01:13,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2020-12-22 10:01:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2414. [2020-12-22 10:01:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2414 states. [2020-12-22 10:01:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3639 transitions. [2020-12-22 10:01:13,708 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3639 transitions. Word has length 77 [2020-12-22 10:01:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:13,708 INFO L481 AbstractCegarLoop]: Abstraction has 2414 states and 3639 transitions. [2020-12-22 10:01:13,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3639 transitions. [2020-12-22 10:01:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:01:13,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:13,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:13,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:01:13,711 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:13,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:01:13,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:13,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778088424] [2020-12-22 10:01:13,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:13,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778088424] [2020-12-22 10:01:13,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:13,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:13,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410029680] [2020-12-22 10:01:13,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:13,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:13,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:13,835 INFO L87 Difference]: Start difference. First operand 2414 states and 3639 transitions. Second operand 3 states. [2020-12-22 10:01:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:13,885 INFO L93 Difference]: Finished difference Result 2626 states and 3975 transitions. [2020-12-22 10:01:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:13,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:01:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:13,901 INFO L225 Difference]: With dead ends: 2626 [2020-12-22 10:01:13,901 INFO L226 Difference]: Without dead ends: 2514 [2020-12-22 10:01:13,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2020-12-22 10:01:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2020-12-22 10:01:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2512 states. [2020-12-22 10:01:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3794 transitions. [2020-12-22 10:01:14,021 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3794 transitions. Word has length 77 [2020-12-22 10:01:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:14,023 INFO L481 AbstractCegarLoop]: Abstraction has 2512 states and 3794 transitions. [2020-12-22 10:01:14,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3794 transitions. [2020-12-22 10:01:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:01:14,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:14,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:14,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:01:14,026 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:01:14,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:14,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425206852] [2020-12-22 10:01:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:14,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425206852] [2020-12-22 10:01:14,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:14,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:14,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126320661] [2020-12-22 10:01:14,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:14,213 INFO L87 Difference]: Start difference. First operand 2512 states and 3794 transitions. Second operand 8 states. [2020-12-22 10:01:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:14,662 INFO L93 Difference]: Finished difference Result 5032 states and 7790 transitions. [2020-12-22 10:01:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:01:14,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:01:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:14,690 INFO L225 Difference]: With dead ends: 5032 [2020-12-22 10:01:14,690 INFO L226 Difference]: Without dead ends: 4822 [2020-12-22 10:01:14,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:01:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2020-12-22 10:01:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2720. [2020-12-22 10:01:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2720 states. [2020-12-22 10:01:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4118 transitions. [2020-12-22 10:01:14,827 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4118 transitions. Word has length 77 [2020-12-22 10:01:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:14,829 INFO L481 AbstractCegarLoop]: Abstraction has 2720 states and 4118 transitions. [2020-12-22 10:01:14,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4118 transitions. [2020-12-22 10:01:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:01:14,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:14,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:14,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:01:14,833 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:14,839 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:01:14,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:14,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183634733] [2020-12-22 10:01:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:14,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183634733] [2020-12-22 10:01:14,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:14,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:14,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165097528] [2020-12-22 10:01:14,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:14,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:14,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:14,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:14,975 INFO L87 Difference]: Start difference. First operand 2720 states and 4118 transitions. Second operand 3 states. [2020-12-22 10:01:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:15,065 INFO L93 Difference]: Finished difference Result 3340 states and 5090 transitions. [2020-12-22 10:01:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:15,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:01:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:15,081 INFO L225 Difference]: With dead ends: 3340 [2020-12-22 10:01:15,082 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:01:15,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:01:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:01:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:01:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4426 transitions. [2020-12-22 10:01:15,206 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4426 transitions. Word has length 79 [2020-12-22 10:01:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:15,206 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4426 transitions. [2020-12-22 10:01:15,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4426 transitions. [2020-12-22 10:01:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:01:15,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:15,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:15,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:01:15,215 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:01:15,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:15,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864136010] [2020-12-22 10:01:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:15,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864136010] [2020-12-22 10:01:15,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:15,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:15,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128087476] [2020-12-22 10:01:15,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:15,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:15,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:15,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:15,521 INFO L87 Difference]: Start difference. First operand 2920 states and 4426 transitions. Second operand 8 states. [2020-12-22 10:01:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:15,868 INFO L93 Difference]: Finished difference Result 3538 states and 5390 transitions. [2020-12-22 10:01:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:15,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:01:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:15,885 INFO L225 Difference]: With dead ends: 3538 [2020-12-22 10:01:15,886 INFO L226 Difference]: Without dead ends: 2922 [2020-12-22 10:01:15,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:01:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-12-22 10:01:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-12-22 10:01:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-12-22 10:01:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4420 transitions. [2020-12-22 10:01:15,987 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4420 transitions. Word has length 79 [2020-12-22 10:01:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:15,987 INFO L481 AbstractCegarLoop]: Abstraction has 2920 states and 4420 transitions. [2020-12-22 10:01:15,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4420 transitions. [2020-12-22 10:01:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:01:15,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:15,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:15,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:01:15,989 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:15,990 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:01:15,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:15,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928193829] [2020-12-22 10:01:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:16,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928193829] [2020-12-22 10:01:16,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:16,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:16,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181117028] [2020-12-22 10:01:16,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:16,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:16,057 INFO L87 Difference]: Start difference. First operand 2920 states and 4420 transitions. Second operand 3 states. [2020-12-22 10:01:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:16,170 INFO L93 Difference]: Finished difference Result 4080 states and 6214 transitions. [2020-12-22 10:01:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:16,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:01:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:16,192 INFO L225 Difference]: With dead ends: 4080 [2020-12-22 10:01:16,192 INFO L226 Difference]: Without dead ends: 3464 [2020-12-22 10:01:16,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2020-12-22 10:01:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3462. [2020-12-22 10:01:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3462 states. [2020-12-22 10:01:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 5244 transitions. [2020-12-22 10:01:16,339 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 5244 transitions. Word has length 79 [2020-12-22 10:01:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:16,340 INFO L481 AbstractCegarLoop]: Abstraction has 3462 states and 5244 transitions. [2020-12-22 10:01:16,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 5244 transitions. [2020-12-22 10:01:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:01:16,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:16,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:16,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:01:16,342 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:01:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:16,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64268697] [2020-12-22 10:01:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:16,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64268697] [2020-12-22 10:01:16,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:16,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:16,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81454220] [2020-12-22 10:01:16,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:16,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:16,422 INFO L87 Difference]: Start difference. First operand 3462 states and 5244 transitions. Second operand 3 states. [2020-12-22 10:01:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:16,597 INFO L93 Difference]: Finished difference Result 5634 states and 8566 transitions. [2020-12-22 10:01:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:16,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:01:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:16,633 INFO L225 Difference]: With dead ends: 5634 [2020-12-22 10:01:16,633 INFO L226 Difference]: Without dead ends: 4476 [2020-12-22 10:01:16,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2020-12-22 10:01:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4474. [2020-12-22 10:01:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4474 states. [2020-12-22 10:01:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 6760 transitions. [2020-12-22 10:01:16,853 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 6760 transitions. Word has length 79 [2020-12-22 10:01:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:16,853 INFO L481 AbstractCegarLoop]: Abstraction has 4474 states and 6760 transitions. [2020-12-22 10:01:16,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 6760 transitions. [2020-12-22 10:01:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:01:16,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:16,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:16,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:01:16,855 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:16,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:01:16,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:16,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506729213] [2020-12-22 10:01:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:16,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506729213] [2020-12-22 10:01:16,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:16,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:16,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890626970] [2020-12-22 10:01:16,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:16,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:16,917 INFO L87 Difference]: Start difference. First operand 4474 states and 6760 transitions. Second operand 3 states. [2020-12-22 10:01:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:17,222 INFO L93 Difference]: Finished difference Result 8526 states and 12874 transitions. [2020-12-22 10:01:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:17,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:01:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:17,238 INFO L225 Difference]: With dead ends: 8526 [2020-12-22 10:01:17,238 INFO L226 Difference]: Without dead ends: 6356 [2020-12-22 10:01:17,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2020-12-22 10:01:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6354. [2020-12-22 10:01:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6354 states. [2020-12-22 10:01:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 9528 transitions. [2020-12-22 10:01:17,703 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 9528 transitions. Word has length 79 [2020-12-22 10:01:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:17,704 INFO L481 AbstractCegarLoop]: Abstraction has 6354 states and 9528 transitions. [2020-12-22 10:01:17,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 9528 transitions. [2020-12-22 10:01:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:01:17,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:17,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:17,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:01:17,706 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:01:17,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:17,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205364225] [2020-12-22 10:01:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:17,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205364225] [2020-12-22 10:01:17,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:17,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:01:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289814017] [2020-12-22 10:01:17,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:01:17,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:01:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:17,771 INFO L87 Difference]: Start difference. First operand 6354 states and 9528 transitions. Second operand 3 states. [2020-12-22 10:01:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:18,279 INFO L93 Difference]: Finished difference Result 13878 states and 20698 transitions. [2020-12-22 10:01:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:01:18,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:01:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:18,305 INFO L225 Difference]: With dead ends: 13878 [2020-12-22 10:01:18,305 INFO L226 Difference]: Without dead ends: 9828 [2020-12-22 10:01:18,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:01:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2020-12-22 10:01:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 9826. [2020-12-22 10:01:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9826 states. [2020-12-22 10:01:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 14536 transitions. [2020-12-22 10:01:18,927 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 14536 transitions. Word has length 79 [2020-12-22 10:01:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:18,927 INFO L481 AbstractCegarLoop]: Abstraction has 9826 states and 14536 transitions. [2020-12-22 10:01:18,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:01:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 14536 transitions. [2020-12-22 10:01:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:01:18,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:18,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:18,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:01:18,929 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:01:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:18,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729203319] [2020-12-22 10:01:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:19,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729203319] [2020-12-22 10:01:19,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:19,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:19,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458418207] [2020-12-22 10:01:19,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:19,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:19,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:19,051 INFO L87 Difference]: Start difference. First operand 9826 states and 14536 transitions. Second operand 8 states. [2020-12-22 10:01:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:20,250 INFO L93 Difference]: Finished difference Result 16289 states and 23807 transitions. [2020-12-22 10:01:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:01:20,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:01:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:20,286 INFO L225 Difference]: With dead ends: 16289 [2020-12-22 10:01:20,286 INFO L226 Difference]: Without dead ends: 16287 [2020-12-22 10:01:20,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:01:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16287 states. [2020-12-22 10:01:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16287 to 10210. [2020-12-22 10:01:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10210 states. [2020-12-22 10:01:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 14888 transitions. [2020-12-22 10:01:21,098 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 14888 transitions. Word has length 80 [2020-12-22 10:01:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:21,099 INFO L481 AbstractCegarLoop]: Abstraction has 10210 states and 14888 transitions. [2020-12-22 10:01:21,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 14888 transitions. [2020-12-22 10:01:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:21,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:21,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:01:21,108 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:21,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:01:21,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:21,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583073881] [2020-12-22 10:01:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:01:21,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583073881] [2020-12-22 10:01:21,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:21,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056825913] [2020-12-22 10:01:21,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:21,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:21,284 INFO L87 Difference]: Start difference. First operand 10210 states and 14888 transitions. Second operand 8 states. [2020-12-22 10:01:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:24,504 INFO L93 Difference]: Finished difference Result 59216 states and 85599 transitions. [2020-12-22 10:01:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:24,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:24,610 INFO L225 Difference]: With dead ends: 59216 [2020-12-22 10:01:24,610 INFO L226 Difference]: Without dead ends: 51310 [2020-12-22 10:01:24,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51310 states. [2020-12-22 10:01:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51310 to 18114. [2020-12-22 10:01:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18114 states. [2020-12-22 10:01:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18114 states to 18114 states and 26216 transitions. [2020-12-22 10:01:26,606 INFO L78 Accepts]: Start accepts. Automaton has 18114 states and 26216 transitions. Word has length 112 [2020-12-22 10:01:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:26,606 INFO L481 AbstractCegarLoop]: Abstraction has 18114 states and 26216 transitions. [2020-12-22 10:01:26,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 18114 states and 26216 transitions. [2020-12-22 10:01:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:26,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:26,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:26,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:01:26,615 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:01:26,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:26,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342245402] [2020-12-22 10:01:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:01:26,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342245402] [2020-12-22 10:01:26,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:26,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:26,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893266808] [2020-12-22 10:01:26,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:26,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:26,944 INFO L87 Difference]: Start difference. First operand 18114 states and 26216 transitions. Second operand 8 states. [2020-12-22 10:01:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:29,877 INFO L93 Difference]: Finished difference Result 67120 states and 96927 transitions. [2020-12-22 10:01:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:29,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:30,011 INFO L225 Difference]: With dead ends: 67120 [2020-12-22 10:01:30,011 INFO L226 Difference]: Without dead ends: 59214 [2020-12-22 10:01:30,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59214 states. [2020-12-22 10:01:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59214 to 29986. [2020-12-22 10:01:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29986 states. [2020-12-22 10:01:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29986 states to 29986 states and 43128 transitions. [2020-12-22 10:01:32,390 INFO L78 Accepts]: Start accepts. Automaton has 29986 states and 43128 transitions. Word has length 112 [2020-12-22 10:01:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:32,391 INFO L481 AbstractCegarLoop]: Abstraction has 29986 states and 43128 transitions. [2020-12-22 10:01:32,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 29986 states and 43128 transitions. [2020-12-22 10:01:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:32,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:32,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:32,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:01:32,402 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:32,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:01:32,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:32,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705305089] [2020-12-22 10:01:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:01:32,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705305089] [2020-12-22 10:01:32,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:32,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576253305] [2020-12-22 10:01:32,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:32,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:32,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:32,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:32,557 INFO L87 Difference]: Start difference. First operand 29986 states and 43128 transitions. Second operand 8 states. [2020-12-22 10:01:36,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:36,729 INFO L93 Difference]: Finished difference Result 75024 states and 108255 transitions. [2020-12-22 10:01:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:36,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:36,868 INFO L225 Difference]: With dead ends: 75024 [2020-12-22 10:01:36,869 INFO L226 Difference]: Without dead ends: 67118 [2020-12-22 10:01:36,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67118 states. [2020-12-22 10:01:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67118 to 37890. [2020-12-22 10:01:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37890 states. [2020-12-22 10:01:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37890 states to 37890 states and 54456 transitions. [2020-12-22 10:01:39,944 INFO L78 Accepts]: Start accepts. Automaton has 37890 states and 54456 transitions. Word has length 112 [2020-12-22 10:01:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:39,945 INFO L481 AbstractCegarLoop]: Abstraction has 37890 states and 54456 transitions. [2020-12-22 10:01:39,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 37890 states and 54456 transitions. [2020-12-22 10:01:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:39,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:39,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:39,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:01:39,957 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:39,958 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:01:39,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:39,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117176938] [2020-12-22 10:01:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:01:40,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117176938] [2020-12-22 10:01:40,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:40,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:40,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527351265] [2020-12-22 10:01:40,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:40,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:40,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:40,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:40,093 INFO L87 Difference]: Start difference. First operand 37890 states and 54456 transitions. Second operand 8 states. [2020-12-22 10:01:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:44,654 INFO L93 Difference]: Finished difference Result 82928 states and 119583 transitions. [2020-12-22 10:01:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:44,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:44,764 INFO L225 Difference]: With dead ends: 82928 [2020-12-22 10:01:44,764 INFO L226 Difference]: Without dead ends: 75022 [2020-12-22 10:01:44,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75022 states. [2020-12-22 10:01:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75022 to 45794. [2020-12-22 10:01:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45794 states. [2020-12-22 10:01:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 65784 transitions. [2020-12-22 10:01:48,279 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 65784 transitions. Word has length 112 [2020-12-22 10:01:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:48,279 INFO L481 AbstractCegarLoop]: Abstraction has 45794 states and 65784 transitions. [2020-12-22 10:01:48,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 65784 transitions. [2020-12-22 10:01:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:48,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:48,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:48,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:01:48,293 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:01:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:48,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413344596] [2020-12-22 10:01:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:01:48,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413344596] [2020-12-22 10:01:48,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:48,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:48,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240056031] [2020-12-22 10:01:48,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:48,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:48,445 INFO L87 Difference]: Start difference. First operand 45794 states and 65784 transitions. Second operand 8 states. [2020-12-22 10:01:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:53,893 INFO L93 Difference]: Finished difference Result 90832 states and 130911 transitions. [2020-12-22 10:01:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:01:53,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:01:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:53,995 INFO L225 Difference]: With dead ends: 90832 [2020-12-22 10:01:53,995 INFO L226 Difference]: Without dead ends: 82926 [2020-12-22 10:01:54,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:01:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82926 states. [2020-12-22 10:01:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82926 to 53698. [2020-12-22 10:01:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53698 states. [2020-12-22 10:01:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 77112 transitions. [2020-12-22 10:01:58,000 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 77112 transitions. Word has length 112 [2020-12-22 10:01:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:58,000 INFO L481 AbstractCegarLoop]: Abstraction has 53698 states and 77112 transitions. [2020-12-22 10:01:58,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:01:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 77112 transitions. [2020-12-22 10:01:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:01:58,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:58,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:58,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:01:58,013 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:01:58,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:58,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133493747] [2020-12-22 10:01:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:01:58,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133493747] [2020-12-22 10:01:58,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:58,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:01:58,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199194193] [2020-12-22 10:01:58,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:01:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:01:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:01:58,264 INFO L87 Difference]: Start difference. First operand 53698 states and 77112 transitions. Second operand 8 states. [2020-12-22 10:02:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:04,588 INFO L93 Difference]: Finished difference Result 93936 states and 135391 transitions. [2020-12-22 10:02:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:02:04,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:02:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:04,679 INFO L225 Difference]: With dead ends: 93936 [2020-12-22 10:02:04,679 INFO L226 Difference]: Without dead ends: 88430 [2020-12-22 10:02:04,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:02:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88430 states. [2020-12-22 10:02:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88430 to 59202. [2020-12-22 10:02:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:02:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 85048 transitions. [2020-12-22 10:02:09,518 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 85048 transitions. Word has length 112 [2020-12-22 10:02:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:09,518 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 85048 transitions. [2020-12-22 10:02:09,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:02:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 85048 transitions. [2020-12-22 10:02:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:09,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:09,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:09,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:02:09,532 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:09,533 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:02:09,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:09,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642209842] [2020-12-22 10:02:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:09,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642209842] [2020-12-22 10:02:09,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:09,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:09,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521782141] [2020-12-22 10:02:09,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:09,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:09,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:09,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:09,609 INFO L87 Difference]: Start difference. First operand 59202 states and 85048 transitions. Second operand 3 states. [2020-12-22 10:02:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:14,005 INFO L93 Difference]: Finished difference Result 116102 states and 166634 transitions. [2020-12-22 10:02:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:14,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:14,168 INFO L225 Difference]: With dead ends: 116102 [2020-12-22 10:02:14,168 INFO L226 Difference]: Without dead ends: 59204 [2020-12-22 10:02:14,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59204 states. [2020-12-22 10:02:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59204 to 59202. [2020-12-22 10:02:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59202 states. [2020-12-22 10:02:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 84360 transitions. [2020-12-22 10:02:18,744 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 84360 transitions. Word has length 113 [2020-12-22 10:02:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:18,744 INFO L481 AbstractCegarLoop]: Abstraction has 59202 states and 84360 transitions. [2020-12-22 10:02:18,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 84360 transitions. [2020-12-22 10:02:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:18,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:18,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:18,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:02:18,752 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:02:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:18,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830537606] [2020-12-22 10:02:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:18,818 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 10:02:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830537606] [2020-12-22 10:02:18,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:18,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912771190] [2020-12-22 10:02:18,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:18,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:18,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:18,820 INFO L87 Difference]: Start difference. First operand 59202 states and 84360 transitions. Second operand 3 states. [2020-12-22 10:02:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:21,031 INFO L93 Difference]: Finished difference Result 87654 states and 124810 transitions. [2020-12-22 10:02:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:21,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:21,068 INFO L225 Difference]: With dead ends: 87654 [2020-12-22 10:02:21,068 INFO L226 Difference]: Without dead ends: 30756 [2020-12-22 10:02:21,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30756 states. [2020-12-22 10:02:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30756 to 30754. [2020-12-22 10:02:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30754 states. [2020-12-22 10:02:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30754 states to 30754 states and 43568 transitions. [2020-12-22 10:02:23,735 INFO L78 Accepts]: Start accepts. Automaton has 30754 states and 43568 transitions. Word has length 113 [2020-12-22 10:02:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:23,735 INFO L481 AbstractCegarLoop]: Abstraction has 30754 states and 43568 transitions. [2020-12-22 10:02:23,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 30754 states and 43568 transitions. [2020-12-22 10:02:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:23,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:23,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:23,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:02:23,743 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:23,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:02:23,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:23,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639221674] [2020-12-22 10:02:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:23,878 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 10:02:23,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639221674] [2020-12-22 10:02:23,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:23,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:23,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624855582] [2020-12-22 10:02:23,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:23,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:23,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:23,881 INFO L87 Difference]: Start difference. First operand 30754 states and 43568 transitions. Second operand 3 states. [2020-12-22 10:02:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:25,032 INFO L93 Difference]: Finished difference Result 44982 states and 63622 transitions. [2020-12-22 10:02:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:25,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:25,050 INFO L225 Difference]: With dead ends: 44982 [2020-12-22 10:02:25,051 INFO L226 Difference]: Without dead ends: 16532 [2020-12-22 10:02:25,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16532 states. [2020-12-22 10:02:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16532 to 16530. [2020-12-22 10:02:26,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16530 states. [2020-12-22 10:02:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16530 states to 16530 states and 23344 transitions. [2020-12-22 10:02:26,241 INFO L78 Accepts]: Start accepts. Automaton has 16530 states and 23344 transitions. Word has length 113 [2020-12-22 10:02:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:26,242 INFO L481 AbstractCegarLoop]: Abstraction has 16530 states and 23344 transitions. [2020-12-22 10:02:26,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16530 states and 23344 transitions. [2020-12-22 10:02:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:26,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:26,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:26,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:02:26,339 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:26,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:02:26,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:26,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873220880] [2020-12-22 10:02:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:26,422 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 10:02:26,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873220880] [2020-12-22 10:02:26,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:02:26,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:02:26,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126286394] [2020-12-22 10:02:26,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:02:26,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:26,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:02:26,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:26,428 INFO L87 Difference]: Start difference. First operand 16530 states and 23344 transitions. Second operand 3 states. [2020-12-22 10:02:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:26,989 INFO L93 Difference]: Finished difference Result 23646 states and 33286 transitions. [2020-12-22 10:02:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:02:26,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:02:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:26,998 INFO L225 Difference]: With dead ends: 23646 [2020-12-22 10:02:26,999 INFO L226 Difference]: Without dead ends: 9420 [2020-12-22 10:02:27,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:02:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2020-12-22 10:02:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9418. [2020-12-22 10:02:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9418 states. [2020-12-22 10:02:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9418 states to 9418 states and 13318 transitions. [2020-12-22 10:02:27,533 INFO L78 Accepts]: Start accepts. Automaton has 9418 states and 13318 transitions. Word has length 113 [2020-12-22 10:02:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:27,533 INFO L481 AbstractCegarLoop]: Abstraction has 9418 states and 13318 transitions. [2020-12-22 10:02:27,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:02:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 9418 states and 13318 transitions. [2020-12-22 10:02:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:02:27,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:27,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:27,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:02:27,535 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:27,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:02:27,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:27,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697412792] [2020-12-22 10:02:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:27,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697412792] [2020-12-22 10:02:27,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260380397] [2020-12-22 10:02:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:02:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:02:28,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:02:28,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:28,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:02:28,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661045003] [2020-12-22 10:02:28,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:02:28,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:28,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:02:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:02:28,416 INFO L87 Difference]: Start difference. First operand 9418 states and 13318 transitions. Second operand 21 states. [2020-12-22 10:02:32,141 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:02:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:02:37,873 INFO L93 Difference]: Finished difference Result 57297 states and 78623 transitions. [2020-12-22 10:02:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:02:37,873 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:02:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:02:38,017 INFO L225 Difference]: With dead ends: 57297 [2020-12-22 10:02:38,017 INFO L226 Difference]: Without dead ends: 50183 [2020-12-22 10:02:38,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:02:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50183 states. [2020-12-22 10:02:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50183 to 32438. [2020-12-22 10:02:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32438 states. [2020-12-22 10:02:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32438 states to 32438 states and 44486 transitions. [2020-12-22 10:02:41,015 INFO L78 Accepts]: Start accepts. Automaton has 32438 states and 44486 transitions. Word has length 113 [2020-12-22 10:02:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:02:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 32438 states and 44486 transitions. [2020-12-22 10:02:41,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:02:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 32438 states and 44486 transitions. [2020-12-22 10:02:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:02:41,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:02:41,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:02:41,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:02:41,236 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:02:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:02:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:02:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:02:41,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300358040] [2020-12-22 10:02:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:02:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:41,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300358040] [2020-12-22 10:02:41,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943984559] [2020-12-22 10:02:41,464 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 10:02:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:02:41,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:02:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:02:41,799 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:02:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:02:42,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:02:42,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:02:42,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046525222] [2020-12-22 10:02:42,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:02:42,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:02:42,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:02:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:02:42,327 INFO L87 Difference]: Start difference. First operand 32438 states and 44486 transitions. Second operand 18 states. [2020-12-22 10:02:47,651 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:02:51,843 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:02:52,892 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:02:53,223 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-22 10:02:57,512 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:03:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:26,688 INFO L93 Difference]: Finished difference Result 352698 states and 477135 transitions. [2020-12-22 10:03:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:03:26,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:03:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:27,204 INFO L225 Difference]: With dead ends: 352698 [2020-12-22 10:03:27,204 INFO L226 Difference]: Without dead ends: 322564 [2020-12-22 10:03:27,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:03:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322564 states. [2020-12-22 10:03:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322564 to 138715. [2020-12-22 10:03:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138715 states. [2020-12-22 10:03:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138715 states to 138715 states and 186012 transitions. [2020-12-22 10:03:43,953 INFO L78 Accepts]: Start accepts. Automaton has 138715 states and 186012 transitions. Word has length 114 [2020-12-22 10:03:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:43,954 INFO L481 AbstractCegarLoop]: Abstraction has 138715 states and 186012 transitions. [2020-12-22 10:03:43,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:03:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 138715 states and 186012 transitions. [2020-12-22 10:03:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:43,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:43,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:44,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:03:44,160 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:03:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:44,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547466258] [2020-12-22 10:03:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:44,246 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 10:03:44,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547466258] [2020-12-22 10:03:44,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:44,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:44,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631625884] [2020-12-22 10:03:44,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:44,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:44,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:44,249 INFO L87 Difference]: Start difference. First operand 138715 states and 186012 transitions. Second operand 3 states. [2020-12-22 10:03:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:50,717 INFO L93 Difference]: Finished difference Result 190807 states and 255147 transitions. [2020-12-22 10:03:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:50,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:03:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:50,816 INFO L225 Difference]: With dead ends: 190807 [2020-12-22 10:03:50,816 INFO L226 Difference]: Without dead ends: 54396 [2020-12-22 10:03:50,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54396 states. [2020-12-22 10:03:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54396 to 50920. [2020-12-22 10:03:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50920 states. [2020-12-22 10:03:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50920 states to 50920 states and 67594 transitions. [2020-12-22 10:03:56,676 INFO L78 Accepts]: Start accepts. Automaton has 50920 states and 67594 transitions. Word has length 114 [2020-12-22 10:03:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:56,677 INFO L481 AbstractCegarLoop]: Abstraction has 50920 states and 67594 transitions. [2020-12-22 10:03:56,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 50920 states and 67594 transitions. [2020-12-22 10:03:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:03:56,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:56,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:56,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:03:56,680 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:56,680 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:03:56,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:56,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473306468] [2020-12-22 10:03:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:03:56,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473306468] [2020-12-22 10:03:56,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:56,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:56,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580058785] [2020-12-22 10:03:56,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:03:56,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:56,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:03:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:03:56,775 INFO L87 Difference]: Start difference. First operand 50920 states and 67594 transitions. Second operand 6 states. [2020-12-22 10:03:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:59,900 INFO L93 Difference]: Finished difference Result 75520 states and 100456 transitions. [2020-12-22 10:03:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:03:59,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:03:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:59,932 INFO L225 Difference]: With dead ends: 75520 [2020-12-22 10:03:59,933 INFO L226 Difference]: Without dead ends: 27021 [2020-12-22 10:03:59,951 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 10:03:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2020-12-22 10:04:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 27021. [2020-12-22 10:04:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27021 states. [2020-12-22 10:04:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27021 states to 27021 states and 36110 transitions. [2020-12-22 10:04:02,965 INFO L78 Accepts]: Start accepts. Automaton has 27021 states and 36110 transitions. Word has length 114 [2020-12-22 10:04:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:02,965 INFO L481 AbstractCegarLoop]: Abstraction has 27021 states and 36110 transitions. [2020-12-22 10:04:02,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:04:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27021 states and 36110 transitions. [2020-12-22 10:04:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:04:02,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:02,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:02,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:04:02,968 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:04:02,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:02,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891231424] [2020-12-22 10:04:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:04:03,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891231424] [2020-12-22 10:04:03,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:03,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:04:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864261124] [2020-12-22 10:04:03,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:04:03,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:04:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:04:03,059 INFO L87 Difference]: Start difference. First operand 27021 states and 36110 transitions. Second operand 6 states. [2020-12-22 10:04:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:05,815 INFO L93 Difference]: Finished difference Result 46014 states and 61207 transitions. [2020-12-22 10:04:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:04:05,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:04:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:05,837 INFO L225 Difference]: With dead ends: 46014 [2020-12-22 10:04:05,837 INFO L226 Difference]: Without dead ends: 21452 [2020-12-22 10:04:05,848 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 10:04:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21452 states. [2020-12-22 10:04:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21452 to 21452. [2020-12-22 10:04:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21452 states. [2020-12-22 10:04:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 28448 transitions. [2020-12-22 10:04:08,171 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 28448 transitions. Word has length 114 [2020-12-22 10:04:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:08,171 INFO L481 AbstractCegarLoop]: Abstraction has 21452 states and 28448 transitions. [2020-12-22 10:04:08,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:04:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 28448 transitions. [2020-12-22 10:04:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:04:08,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:08,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:08,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:04:08,173 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash -165021109, now seen corresponding path program 1 times [2020-12-22 10:04:08,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:08,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526607929] [2020-12-22 10:04:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 10:04:08,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526607929] [2020-12-22 10:04:08,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:08,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:04:08,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705137738] [2020-12-22 10:04:08,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:04:08,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:08,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:04:08,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:04:08,258 INFO L87 Difference]: Start difference. First operand 21452 states and 28448 transitions. Second operand 6 states. [2020-12-22 10:04:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:12,373 INFO L93 Difference]: Finished difference Result 55740 states and 73808 transitions. [2020-12-22 10:04:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:04:12,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:04:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:12,417 INFO L225 Difference]: With dead ends: 55740 [2020-12-22 10:04:12,417 INFO L226 Difference]: Without dead ends: 36636 [2020-12-22 10:04:12,429 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 10:04:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36636 states. [2020-12-22 10:04:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36636 to 32674. [2020-12-22 10:04:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32674 states. [2020-12-22 10:04:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32674 states to 32674 states and 43051 transitions. [2020-12-22 10:04:16,262 INFO L78 Accepts]: Start accepts. Automaton has 32674 states and 43051 transitions. Word has length 114 [2020-12-22 10:04:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:16,262 INFO L481 AbstractCegarLoop]: Abstraction has 32674 states and 43051 transitions. [2020-12-22 10:04:16,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:04:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 32674 states and 43051 transitions. [2020-12-22 10:04:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 10:04:16,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:16,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:16,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 10:04:16,266 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash 278857549, now seen corresponding path program 1 times [2020-12-22 10:04:16,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:16,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481705258] [2020-12-22 10:04:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:16,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481705258] [2020-12-22 10:04:16,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514393462] [2020-12-22 10:04:16,524 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