/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/product-lines/elevator_spec2_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:06:59,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:06:59,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:07:00,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:07:00,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:07:00,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:07:00,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:07:00,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:07:00,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:07:00,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:07:00,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:07:00,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:07:00,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:07:00,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:07:00,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:07:00,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:07:00,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:07:00,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:07:00,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:07:00,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:07:00,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:07:00,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:07:00,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:07:00,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:07:00,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:07:00,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:07:00,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:07:00,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:07:00,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:07:00,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:07:00,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:07:00,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:07:00,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:07:00,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:07:00,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:07:00,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:07:00,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:07:00,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:07:00,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:07:00,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:07:00,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:07:00,126 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:07:00,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:07:00,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:07:00,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:07:00,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:07:00,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:07:00,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:07:00,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:07:00,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:07:00,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:07:00,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:07:00,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:07:00,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:07:00,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:07:00,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:07:00,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:07:00,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:07:00,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:07:00,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:07:00,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:07:00,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:07:00,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:07:00,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:07:00,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:07:00,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:07:00,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:07:00,547 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:07:00,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2020-12-22 06:07:00,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abb1d5286/86de4199ca384647a0cc08e23e8bbb86/FLAG93005be1f [2020-12-22 06:07:01,490 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:07:01,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2020-12-22 06:07:01,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abb1d5286/86de4199ca384647a0cc08e23e8bbb86/FLAG93005be1f [2020-12-22 06:07:01,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abb1d5286/86de4199ca384647a0cc08e23e8bbb86 [2020-12-22 06:07:01,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:07:01,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:07:01,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:07:01,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:07:01,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:07:01,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:07:01" (1/1) ... [2020-12-22 06:07:01,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524c38ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:01, skipping insertion in model container [2020-12-22 06:07:01,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:07:01" (1/1) ... [2020-12-22 06:07:01,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:07:01,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:07:02,379 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/product-lines/elevator_spec2_product31.cil.c[64126,64139] [2020-12-22 06:07:02,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:07:02,507 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:07:02,678 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/product-lines/elevator_spec2_product31.cil.c[64126,64139] [2020-12-22 06:07:02,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:07:02,806 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:07:02,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02 WrapperNode [2020-12-22 06:07:02,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:07:02,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:07:02,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:07:02,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:07:02,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:02,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:07:03,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:07:03,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:07:03,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:07:03,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (1/1) ... [2020-12-22 06:07:03,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:07:03,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:07:03,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:07:03,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:07:03,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (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 06:07:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:07:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:07:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:07:03,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:07:11,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:07:11,414 INFO L299 CfgBuilder]: Removed 893 assume(true) statements. [2020-12-22 06:07:11,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:07:11 BoogieIcfgContainer [2020-12-22 06:07:11,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:07:11,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:07:11,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:07:11,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:07:11,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:07:01" (1/3) ... [2020-12-22 06:07:11,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8d4535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:07:11, skipping insertion in model container [2020-12-22 06:07:11,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:07:02" (2/3) ... [2020-12-22 06:07:11,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8d4535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:07:11, skipping insertion in model container [2020-12-22 06:07:11,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:07:11" (3/3) ... [2020-12-22 06:07:11,429 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2020-12-22 06:07:11,435 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:07:11,452 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:07:11,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:07:11,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:07:11,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:07:11,512 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:07:11,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:07:11,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:07:11,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:07:11,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:07:11,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:07:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states. [2020-12-22 06:07:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 06:07:11,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:11,598 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] [2020-12-22 06:07:11,599 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -210396081, now seen corresponding path program 1 times [2020-12-22 06:07:11,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:11,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281837794] [2020-12-22 06:07:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:12,006 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 06:07:12,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281837794] [2020-12-22 06:07:12,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:12,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466360446] [2020-12-22 06:07:12,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:07:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:12,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:07:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:07:12,031 INFO L87 Difference]: Start difference. First operand 3676 states. Second operand 3 states. [2020-12-22 06:07:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:12,347 INFO L93 Difference]: Finished difference Result 7343 states and 13821 transitions. [2020-12-22 06:07:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:07:12,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 06:07:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:12,401 INFO L225 Difference]: With dead ends: 7343 [2020-12-22 06:07:12,401 INFO L226 Difference]: Without dead ends: 3672 [2020-12-22 06:07:12,416 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 06:07:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2020-12-22 06:07:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3672. [2020-12-22 06:07:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3672 states. [2020-12-22 06:07:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 6901 transitions. [2020-12-22 06:07:12,613 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 6901 transitions. Word has length 44 [2020-12-22 06:07:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:12,613 INFO L481 AbstractCegarLoop]: Abstraction has 3672 states and 6901 transitions. [2020-12-22 06:07:12,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:07:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 6901 transitions. [2020-12-22 06:07:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 06:07:12,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:12,618 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] [2020-12-22 06:07:12,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:07:12,618 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:12,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1495613832, now seen corresponding path program 1 times [2020-12-22 06:07:12,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:12,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102142747] [2020-12-22 06:07:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:12,782 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 06:07:12,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102142747] [2020-12-22 06:07:12,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:12,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:07:12,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42611062] [2020-12-22 06:07:12,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:07:12,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:12,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:07:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:07:12,788 INFO L87 Difference]: Start difference. First operand 3672 states and 6901 transitions. Second operand 6 states. [2020-12-22 06:07:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:13,108 INFO L93 Difference]: Finished difference Result 7295 states and 13718 transitions. [2020-12-22 06:07:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:07:13,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 06:07:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:13,130 INFO L225 Difference]: With dead ends: 7295 [2020-12-22 06:07:13,130 INFO L226 Difference]: Without dead ends: 3666 [2020-12-22 06:07:13,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:07:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2020-12-22 06:07:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3666. [2020-12-22 06:07:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3666 states. [2020-12-22 06:07:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 6888 transitions. [2020-12-22 06:07:13,280 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 6888 transitions. Word has length 51 [2020-12-22 06:07:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:13,281 INFO L481 AbstractCegarLoop]: Abstraction has 3666 states and 6888 transitions. [2020-12-22 06:07:13,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:07:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 6888 transitions. [2020-12-22 06:07:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:07:13,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:13,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:13,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:07:13,290 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1183731498, now seen corresponding path program 1 times [2020-12-22 06:07:13,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:13,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123496567] [2020-12-22 06:07:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:13,472 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 06:07:13,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123496567] [2020-12-22 06:07:13,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:13,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:13,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643526803] [2020-12-22 06:07:13,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:13,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:13,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:13,480 INFO L87 Difference]: Start difference. First operand 3666 states and 6888 transitions. Second operand 4 states. [2020-12-22 06:07:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:13,771 INFO L93 Difference]: Finished difference Result 7289 states and 13705 transitions. [2020-12-22 06:07:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:13,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-12-22 06:07:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:13,793 INFO L225 Difference]: With dead ends: 7289 [2020-12-22 06:07:13,794 INFO L226 Difference]: Without dead ends: 3666 [2020-12-22 06:07:13,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:07:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2020-12-22 06:07:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3666. [2020-12-22 06:07:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3666 states. [2020-12-22 06:07:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 6884 transitions. [2020-12-22 06:07:13,947 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 6884 transitions. Word has length 52 [2020-12-22 06:07:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:13,951 INFO L481 AbstractCegarLoop]: Abstraction has 3666 states and 6884 transitions. [2020-12-22 06:07:13,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 6884 transitions. [2020-12-22 06:07:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 06:07:14,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:14,026 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] [2020-12-22 06:07:14,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:07:14,026 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1586119301, now seen corresponding path program 1 times [2020-12-22 06:07:14,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:14,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422802604] [2020-12-22 06:07:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:14,145 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 06:07:14,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422802604] [2020-12-22 06:07:14,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:14,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:14,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732479460] [2020-12-22 06:07:14,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:14,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:14,147 INFO L87 Difference]: Start difference. First operand 3666 states and 6884 transitions. Second operand 4 states. [2020-12-22 06:07:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:14,387 INFO L93 Difference]: Finished difference Result 7289 states and 13701 transitions. [2020-12-22 06:07:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:14,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 06:07:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:14,408 INFO L225 Difference]: With dead ends: 7289 [2020-12-22 06:07:14,409 INFO L226 Difference]: Without dead ends: 3666 [2020-12-22 06:07:14,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:07:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2020-12-22 06:07:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3666. [2020-12-22 06:07:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3666 states. [2020-12-22 06:07:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 6880 transitions. [2020-12-22 06:07:14,557 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 6880 transitions. Word has length 53 [2020-12-22 06:07:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:14,557 INFO L481 AbstractCegarLoop]: Abstraction has 3666 states and 6880 transitions. [2020-12-22 06:07:14,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 6880 transitions. [2020-12-22 06:07:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:07:14,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:14,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:14,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:07:14,562 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:14,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1958161307, now seen corresponding path program 1 times [2020-12-22 06:07:14,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:14,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476659300] [2020-12-22 06:07:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:14,626 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 06:07:14,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476659300] [2020-12-22 06:07:14,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:14,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:14,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093446443] [2020-12-22 06:07:14,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:14,628 INFO L87 Difference]: Start difference. First operand 3666 states and 6880 transitions. Second operand 4 states. [2020-12-22 06:07:14,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:14,856 INFO L93 Difference]: Finished difference Result 7289 states and 13697 transitions. [2020-12-22 06:07:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:14,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:07:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:14,880 INFO L225 Difference]: With dead ends: 7289 [2020-12-22 06:07:14,880 INFO L226 Difference]: Without dead ends: 3666 [2020-12-22 06:07:14,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:07:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2020-12-22 06:07:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3666. [2020-12-22 06:07:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3666 states. [2020-12-22 06:07:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 6876 transitions. [2020-12-22 06:07:15,037 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 6876 transitions. Word has length 54 [2020-12-22 06:07:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:15,038 INFO L481 AbstractCegarLoop]: Abstraction has 3666 states and 6876 transitions. [2020-12-22 06:07:15,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 6876 transitions. [2020-12-22 06:07:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:07:15,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:15,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:15,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:07:15,043 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash 871598053, now seen corresponding path program 1 times [2020-12-22 06:07:15,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:15,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105019251] [2020-12-22 06:07:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:15,152 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 06:07:15,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105019251] [2020-12-22 06:07:15,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:15,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620571026] [2020-12-22 06:07:15,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:15,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:15,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:15,156 INFO L87 Difference]: Start difference. First operand 3666 states and 6876 transitions. Second operand 4 states. [2020-12-22 06:07:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:15,414 INFO L93 Difference]: Finished difference Result 7289 states and 13693 transitions. [2020-12-22 06:07:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:15,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-12-22 06:07:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:15,458 INFO L225 Difference]: With dead ends: 7289 [2020-12-22 06:07:15,458 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:07:15,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 06:07:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:07:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:07:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:07:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6842 transitions. [2020-12-22 06:07:15,639 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6842 transitions. Word has length 54 [2020-12-22 06:07:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:15,640 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6842 transitions. [2020-12-22 06:07:15,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6842 transitions. [2020-12-22 06:07:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:07:15,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:15,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:15,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:07:15,644 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash 999856224, now seen corresponding path program 1 times [2020-12-22 06:07:15,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:15,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441383275] [2020-12-22 06:07:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:15,745 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 06:07:15,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441383275] [2020-12-22 06:07:15,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:15,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662337902] [2020-12-22 06:07:15,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:15,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:15,748 INFO L87 Difference]: Start difference. First operand 3645 states and 6842 transitions. Second operand 4 states. [2020-12-22 06:07:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:15,965 INFO L93 Difference]: Finished difference Result 7268 states and 13659 transitions. [2020-12-22 06:07:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:15,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-22 06:07:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:15,978 INFO L225 Difference]: With dead ends: 7268 [2020-12-22 06:07:15,978 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:07:15,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:07:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:07:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:07:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:07:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6841 transitions. [2020-12-22 06:07:16,151 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6841 transitions. Word has length 55 [2020-12-22 06:07:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:16,151 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6841 transitions. [2020-12-22 06:07:16,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6841 transitions. [2020-12-22 06:07:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:07:16,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:16,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:16,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:07:16,155 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:16,156 INFO L82 PathProgramCache]: Analyzing trace with hash -629314144, now seen corresponding path program 1 times [2020-12-22 06:07:16,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:16,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359961176] [2020-12-22 06:07:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:16,224 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 06:07:16,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359961176] [2020-12-22 06:07:16,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:16,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:07:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817588086] [2020-12-22 06:07:16,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:16,227 INFO L87 Difference]: Start difference. First operand 3645 states and 6841 transitions. Second operand 4 states. [2020-12-22 06:07:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:16,462 INFO L93 Difference]: Finished difference Result 7268 states and 13658 transitions. [2020-12-22 06:07:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:16,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-12-22 06:07:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:16,476 INFO L225 Difference]: With dead ends: 7268 [2020-12-22 06:07:16,477 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:07:16,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 06:07:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:07:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:07:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:07:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6840 transitions. [2020-12-22 06:07:16,652 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6840 transitions. Word has length 56 [2020-12-22 06:07:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:16,652 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6840 transitions. [2020-12-22 06:07:16,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6840 transitions. [2020-12-22 06:07:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:07:16,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:16,659 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] [2020-12-22 06:07:16,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:07:16,659 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1567578683, now seen corresponding path program 1 times [2020-12-22 06:07:16,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:16,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347674623] [2020-12-22 06:07:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:16,763 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 06:07:16,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347674623] [2020-12-22 06:07:16,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:16,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:07:16,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760259316] [2020-12-22 06:07:16,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:07:16,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:07:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:07:16,768 INFO L87 Difference]: Start difference. First operand 3645 states and 6840 transitions. Second operand 7 states. [2020-12-22 06:07:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:17,067 INFO L93 Difference]: Finished difference Result 7262 states and 13646 transitions. [2020-12-22 06:07:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:07:17,067 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-12-22 06:07:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:17,079 INFO L225 Difference]: With dead ends: 7262 [2020-12-22 06:07:17,079 INFO L226 Difference]: Without dead ends: 3645 [2020-12-22 06:07:17,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:07:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-12-22 06:07:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2020-12-22 06:07:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2020-12-22 06:07:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6839 transitions. [2020-12-22 06:07:17,288 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6839 transitions. Word has length 57 [2020-12-22 06:07:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:17,288 INFO L481 AbstractCegarLoop]: Abstraction has 3645 states and 6839 transitions. [2020-12-22 06:07:17,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:07:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6839 transitions. [2020-12-22 06:07:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:07:17,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:17,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:07:17,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:07:17,293 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:17,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2108440587, now seen corresponding path program 1 times [2020-12-22 06:07:17,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:17,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345884754] [2020-12-22 06:07:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:17,366 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 06:07:17,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345884754] [2020-12-22 06:07:17,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:17,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:07:17,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546851764] [2020-12-22 06:07:17,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:07:17,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:17,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:07:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:07:17,369 INFO L87 Difference]: Start difference. First operand 3645 states and 6839 transitions. Second operand 6 states. [2020-12-22 06:07:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:23,294 INFO L93 Difference]: Finished difference Result 25109 states and 46993 transitions. [2020-12-22 06:07:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:07:23,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-12-22 06:07:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:23,358 INFO L225 Difference]: With dead ends: 25109 [2020-12-22 06:07:23,358 INFO L226 Difference]: Without dead ends: 21525 [2020-12-22 06:07:23,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 06:07:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21525 states. [2020-12-22 06:07:23,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21525 to 3651. [2020-12-22 06:07:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3651 states. [2020-12-22 06:07:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 6845 transitions. [2020-12-22 06:07:23,718 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 6845 transitions. Word has length 58 [2020-12-22 06:07:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:23,719 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 6845 transitions. [2020-12-22 06:07:23,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:07:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 6845 transitions. [2020-12-22 06:07:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:07:23,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:23,722 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] [2020-12-22 06:07:23,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:07:23,722 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash -163751229, now seen corresponding path program 1 times [2020-12-22 06:07:23,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:23,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394624011] [2020-12-22 06:07:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:23,829 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 06:07:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394624011] [2020-12-22 06:07:23,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:23,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:07:23,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690293311] [2020-12-22 06:07:23,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:07:23,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:07:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:07:23,833 INFO L87 Difference]: Start difference. First operand 3651 states and 6845 transitions. Second operand 7 states. [2020-12-22 06:07:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:31,635 INFO L93 Difference]: Finished difference Result 15698 states and 29396 transitions. [2020-12-22 06:07:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 06:07:31,636 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 06:07:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:31,667 INFO L225 Difference]: With dead ends: 15698 [2020-12-22 06:07:31,667 INFO L226 Difference]: Without dead ends: 12086 [2020-12-22 06:07:31,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-22 06:07:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2020-12-22 06:07:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 4605. [2020-12-22 06:07:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4605 states. [2020-12-22 06:07:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 8365 transitions. [2020-12-22 06:07:31,997 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 8365 transitions. Word has length 59 [2020-12-22 06:07:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:31,997 INFO L481 AbstractCegarLoop]: Abstraction has 4605 states and 8365 transitions. [2020-12-22 06:07:31,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:07:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 8365 transitions. [2020-12-22 06:07:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:07:31,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:32,000 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 06:07:32,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:07:32,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash -379266673, now seen corresponding path program 1 times [2020-12-22 06:07:32,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:32,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714532728] [2020-12-22 06:07:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:32,105 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 06:07:32,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714532728] [2020-12-22 06:07:32,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:32,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:32,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703255311] [2020-12-22 06:07:32,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:32,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:32,107 INFO L87 Difference]: Start difference. First operand 4605 states and 8365 transitions. Second operand 4 states. [2020-12-22 06:07:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:34,184 INFO L93 Difference]: Finished difference Result 12530 states and 22942 transitions. [2020-12-22 06:07:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:34,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 06:07:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:34,204 INFO L225 Difference]: With dead ends: 12530 [2020-12-22 06:07:34,204 INFO L226 Difference]: Without dead ends: 7962 [2020-12-22 06:07:34,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2020-12-22 06:07:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 4605. [2020-12-22 06:07:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4605 states. [2020-12-22 06:07:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 8356 transitions. [2020-12-22 06:07:34,500 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 8356 transitions. Word has length 60 [2020-12-22 06:07:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:34,500 INFO L481 AbstractCegarLoop]: Abstraction has 4605 states and 8356 transitions. [2020-12-22 06:07:34,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:34,501 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 8356 transitions. [2020-12-22 06:07:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:07:34,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:34,503 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] [2020-12-22 06:07:34,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:07:34,504 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:34,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1419970495, now seen corresponding path program 1 times [2020-12-22 06:07:34,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:34,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868899949] [2020-12-22 06:07:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:34,580 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 06:07:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868899949] [2020-12-22 06:07:34,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:34,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:07:34,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451515590] [2020-12-22 06:07:34,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:07:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:07:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:07:34,583 INFO L87 Difference]: Start difference. First operand 4605 states and 8356 transitions. Second operand 6 states. [2020-12-22 06:07:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:42,154 INFO L93 Difference]: Finished difference Result 54786 states and 99312 transitions. [2020-12-22 06:07:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 06:07:42,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-12-22 06:07:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:42,233 INFO L225 Difference]: With dead ends: 54786 [2020-12-22 06:07:42,233 INFO L226 Difference]: Without dead ends: 50245 [2020-12-22 06:07:42,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 06:07:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50245 states. [2020-12-22 06:07:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50245 to 9167. [2020-12-22 06:07:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9167 states. [2020-12-22 06:07:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9167 states to 9167 states and 16665 transitions. [2020-12-22 06:07:43,158 INFO L78 Accepts]: Start accepts. Automaton has 9167 states and 16665 transitions. Word has length 62 [2020-12-22 06:07:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:43,158 INFO L481 AbstractCegarLoop]: Abstraction has 9167 states and 16665 transitions. [2020-12-22 06:07:43,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:07:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 9167 states and 16665 transitions. [2020-12-22 06:07:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:07:43,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:43,163 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] [2020-12-22 06:07:43,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:07:43,164 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash 533498457, now seen corresponding path program 1 times [2020-12-22 06:07:43,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:43,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72910601] [2020-12-22 06:07:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:43,243 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 06:07:43,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72910601] [2020-12-22 06:07:43,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:43,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:07:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845913311] [2020-12-22 06:07:43,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:07:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:07:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:07:43,245 INFO L87 Difference]: Start difference. First operand 9167 states and 16665 transitions. Second operand 6 states. [2020-12-22 06:07:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:53,611 INFO L93 Difference]: Finished difference Result 84323 states and 152982 transitions. [2020-12-22 06:07:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 06:07:53,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 06:07:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:53,717 INFO L225 Difference]: With dead ends: 84323 [2020-12-22 06:07:53,717 INFO L226 Difference]: Without dead ends: 75256 [2020-12-22 06:07:53,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 06:07:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75256 states. [2020-12-22 06:07:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75256 to 13729. [2020-12-22 06:07:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13729 states. [2020-12-22 06:07:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13729 states to 13729 states and 24974 transitions. [2020-12-22 06:07:55,017 INFO L78 Accepts]: Start accepts. Automaton has 13729 states and 24974 transitions. Word has length 63 [2020-12-22 06:07:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:55,018 INFO L481 AbstractCegarLoop]: Abstraction has 13729 states and 24974 transitions. [2020-12-22 06:07:55,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:07:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 13729 states and 24974 transitions. [2020-12-22 06:07:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:07:55,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:55,024 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] [2020-12-22 06:07:55,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:07:55,025 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1609843596, now seen corresponding path program 1 times [2020-12-22 06:07:55,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:55,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387061039] [2020-12-22 06:07:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:55,093 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 06:07:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387061039] [2020-12-22 06:07:55,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:55,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:07:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572960144] [2020-12-22 06:07:55,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:07:55,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:55,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:07:55,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:07:55,095 INFO L87 Difference]: Start difference. First operand 13729 states and 24974 transitions. Second operand 5 states. [2020-12-22 06:07:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:55,439 INFO L93 Difference]: Finished difference Result 18306 states and 33297 transitions. [2020-12-22 06:07:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:07:55,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 06:07:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:55,445 INFO L225 Difference]: With dead ends: 18306 [2020-12-22 06:07:55,445 INFO L226 Difference]: Without dead ends: 4602 [2020-12-22 06:07:55,458 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 06:07:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2020-12-22 06:07:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2020-12-22 06:07:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4602 states. [2020-12-22 06:07:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 8349 transitions. [2020-12-22 06:07:55,690 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 8349 transitions. Word has length 63 [2020-12-22 06:07:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:55,690 INFO L481 AbstractCegarLoop]: Abstraction has 4602 states and 8349 transitions. [2020-12-22 06:07:55,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:07:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 8349 transitions. [2020-12-22 06:07:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 06:07:55,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:55,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:07:55,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:07:55,692 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1793986524, now seen corresponding path program 1 times [2020-12-22 06:07:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:55,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076736543] [2020-12-22 06:07:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:55,793 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 06:07:55,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076736543] [2020-12-22 06:07:55,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:55,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:55,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937488706] [2020-12-22 06:07:55,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:55,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:55,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:55,798 INFO L87 Difference]: Start difference. First operand 4602 states and 8349 transitions. Second operand 4 states. [2020-12-22 06:07:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:07:58,176 INFO L93 Difference]: Finished difference Result 12525 states and 22915 transitions. [2020-12-22 06:07:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:07:58,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 06:07:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:07:58,186 INFO L225 Difference]: With dead ends: 12525 [2020-12-22 06:07:58,186 INFO L226 Difference]: Without dead ends: 7959 [2020-12-22 06:07:58,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7959 states. [2020-12-22 06:07:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7959 to 4602. [2020-12-22 06:07:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4602 states. [2020-12-22 06:07:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 8340 transitions. [2020-12-22 06:07:58,540 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 8340 transitions. Word has length 64 [2020-12-22 06:07:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:07:58,541 INFO L481 AbstractCegarLoop]: Abstraction has 4602 states and 8340 transitions. [2020-12-22 06:07:58,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:07:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 8340 transitions. [2020-12-22 06:07:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:07:58,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:07:58,543 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] [2020-12-22 06:07:58,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:07:58,543 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:07:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:07:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1275335116, now seen corresponding path program 1 times [2020-12-22 06:07:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:07:58,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122716842] [2020-12-22 06:07:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:07:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:07:58,650 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 06:07:58,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122716842] [2020-12-22 06:07:58,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:07:58,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:07:58,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120385324] [2020-12-22 06:07:58,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:07:58,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:07:58,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:07:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:07:58,653 INFO L87 Difference]: Start difference. First operand 4602 states and 8340 transitions. Second operand 4 states. [2020-12-22 06:08:00,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:00,803 INFO L93 Difference]: Finished difference Result 12525 states and 22898 transitions. [2020-12-22 06:08:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:08:00,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 06:08:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:00,812 INFO L225 Difference]: With dead ends: 12525 [2020-12-22 06:08:00,812 INFO L226 Difference]: Without dead ends: 7959 [2020-12-22 06:08:00,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:08:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7959 states. [2020-12-22 06:08:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7959 to 4602. [2020-12-22 06:08:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4602 states. [2020-12-22 06:08:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 8331 transitions. [2020-12-22 06:08:01,047 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 8331 transitions. Word has length 65 [2020-12-22 06:08:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:01,048 INFO L481 AbstractCegarLoop]: Abstraction has 4602 states and 8331 transitions. [2020-12-22 06:08:01,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:08:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 8331 transitions. [2020-12-22 06:08:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:08:01,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:01,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:01,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:08:01,050 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash 776663799, now seen corresponding path program 1 times [2020-12-22 06:08:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:01,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478255091] [2020-12-22 06:08:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:01,115 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 06:08:01,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478255091] [2020-12-22 06:08:01,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:01,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:08:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090471863] [2020-12-22 06:08:01,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:01,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:01,118 INFO L87 Difference]: Start difference. First operand 4602 states and 8331 transitions. Second operand 3 states. [2020-12-22 06:08:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:01,548 INFO L93 Difference]: Finished difference Result 8727 states and 15817 transitions. [2020-12-22 06:08:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:01,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 06:08:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:01,557 INFO L225 Difference]: With dead ends: 8727 [2020-12-22 06:08:01,558 INFO L226 Difference]: Without dead ends: 6656 [2020-12-22 06:08:01,561 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 06:08:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2020-12-22 06:08:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 6635. [2020-12-22 06:08:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6635 states. [2020-12-22 06:08:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 12028 transitions. [2020-12-22 06:08:02,006 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 12028 transitions. Word has length 66 [2020-12-22 06:08:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:02,006 INFO L481 AbstractCegarLoop]: Abstraction has 6635 states and 12028 transitions. [2020-12-22 06:08:02,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 12028 transitions. [2020-12-22 06:08:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:08:02,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:02,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:02,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:08:02,008 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2061490401, now seen corresponding path program 1 times [2020-12-22 06:08:02,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:02,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122348136] [2020-12-22 06:08:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:08:02,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122348136] [2020-12-22 06:08:02,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:02,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:08:02,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731212753] [2020-12-22 06:08:02,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:08:02,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:02,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:08:02,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:08:02,084 INFO L87 Difference]: Start difference. First operand 6635 states and 12028 transitions. Second operand 5 states. [2020-12-22 06:08:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:02,719 INFO L93 Difference]: Finished difference Result 10730 states and 19457 transitions. [2020-12-22 06:08:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:08:02,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 06:08:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:02,728 INFO L225 Difference]: With dead ends: 10730 [2020-12-22 06:08:02,729 INFO L226 Difference]: Without dead ends: 6654 [2020-12-22 06:08:02,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 06:08:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2020-12-22 06:08:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 6635. [2020-12-22 06:08:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6635 states. [2020-12-22 06:08:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 12018 transitions. [2020-12-22 06:08:03,153 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 12018 transitions. Word has length 67 [2020-12-22 06:08:03,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:03,154 INFO L481 AbstractCegarLoop]: Abstraction has 6635 states and 12018 transitions. [2020-12-22 06:08:03,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:08:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 12018 transitions. [2020-12-22 06:08:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:08:03,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:03,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:03,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:08:03,156 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1646670881, now seen corresponding path program 1 times [2020-12-22 06:08:03,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:03,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546938829] [2020-12-22 06:08:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:03,216 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 06:08:03,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546938829] [2020-12-22 06:08:03,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:03,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:08:03,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375701175] [2020-12-22 06:08:03,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:03,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:03,218 INFO L87 Difference]: Start difference. First operand 6635 states and 12018 transitions. Second operand 3 states. [2020-12-22 06:08:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:03,888 INFO L93 Difference]: Finished difference Result 17740 states and 32298 transitions. [2020-12-22 06:08:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:03,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 06:08:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:03,904 INFO L225 Difference]: With dead ends: 17740 [2020-12-22 06:08:03,904 INFO L226 Difference]: Without dead ends: 12456 [2020-12-22 06:08:03,911 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 06:08:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12456 states. [2020-12-22 06:08:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12456 to 12456. [2020-12-22 06:08:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12456 states. [2020-12-22 06:08:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 22679 transitions. [2020-12-22 06:08:04,616 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 22679 transitions. Word has length 67 [2020-12-22 06:08:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:04,616 INFO L481 AbstractCegarLoop]: Abstraction has 12456 states and 22679 transitions. [2020-12-22 06:08:04,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 22679 transitions. [2020-12-22 06:08:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:08:04,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:04,619 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] [2020-12-22 06:08:04,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:08:04,619 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:04,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1369041296, now seen corresponding path program 1 times [2020-12-22 06:08:04,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:04,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157647929] [2020-12-22 06:08:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:04,684 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 06:08:04,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157647929] [2020-12-22 06:08:04,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:04,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:08:04,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096478901] [2020-12-22 06:08:04,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:04,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:04,687 INFO L87 Difference]: Start difference. First operand 12456 states and 22679 transitions. Second operand 3 states. [2020-12-22 06:08:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:05,960 INFO L93 Difference]: Finished difference Result 34478 states and 62897 transitions. [2020-12-22 06:08:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:05,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:08:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:05,988 INFO L225 Difference]: With dead ends: 34478 [2020-12-22 06:08:05,989 INFO L226 Difference]: Without dead ends: 23984 [2020-12-22 06:08:06,001 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 06:08:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23984 states. [2020-12-22 06:08:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23984 to 23982. [2020-12-22 06:08:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23982 states. [2020-12-22 06:08:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23982 states to 23982 states and 43778 transitions. [2020-12-22 06:08:07,437 INFO L78 Accepts]: Start accepts. Automaton has 23982 states and 43778 transitions. Word has length 69 [2020-12-22 06:08:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:07,437 INFO L481 AbstractCegarLoop]: Abstraction has 23982 states and 43778 transitions. [2020-12-22 06:08:07,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 23982 states and 43778 transitions. [2020-12-22 06:08:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 06:08:07,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:07,440 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] [2020-12-22 06:08:07,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:08:07,441 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash -675186243, now seen corresponding path program 1 times [2020-12-22 06:08:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:07,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215209434] [2020-12-22 06:08:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:07,513 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 06:08:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215209434] [2020-12-22 06:08:07,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:07,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:08:07,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821259853] [2020-12-22 06:08:07,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:07,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:07,518 INFO L87 Difference]: Start difference. First operand 23982 states and 43778 transitions. Second operand 3 states. [2020-12-22 06:08:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:09,882 INFO L93 Difference]: Finished difference Result 67710 states and 123628 transitions. [2020-12-22 06:08:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:09,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 06:08:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:09,940 INFO L225 Difference]: With dead ends: 67710 [2020-12-22 06:08:09,941 INFO L226 Difference]: Without dead ends: 46801 [2020-12-22 06:08:09,960 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 06:08:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46801 states. [2020-12-22 06:08:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46801 to 46797. [2020-12-22 06:08:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46797 states. [2020-12-22 06:08:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46797 states to 46797 states and 85520 transitions. [2020-12-22 06:08:12,832 INFO L78 Accepts]: Start accepts. Automaton has 46797 states and 85520 transitions. Word has length 70 [2020-12-22 06:08:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:12,833 INFO L481 AbstractCegarLoop]: Abstraction has 46797 states and 85520 transitions. [2020-12-22 06:08:12,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46797 states and 85520 transitions. [2020-12-22 06:08:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 06:08:12,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:12,836 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] [2020-12-22 06:08:12,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:08:12,836 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash 544086487, now seen corresponding path program 1 times [2020-12-22 06:08:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:12,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715224718] [2020-12-22 06:08:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:12,907 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 06:08:12,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715224718] [2020-12-22 06:08:12,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:12,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:08:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898944418] [2020-12-22 06:08:12,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:12,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:12,909 INFO L87 Difference]: Start difference. First operand 46797 states and 85520 transitions. Second operand 3 states. [2020-12-22 06:08:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:18,462 INFO L93 Difference]: Finished difference Result 133674 states and 244131 transitions. [2020-12-22 06:08:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:18,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 06:08:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:18,603 INFO L225 Difference]: With dead ends: 133674 [2020-12-22 06:08:18,603 INFO L226 Difference]: Without dead ends: 91954 [2020-12-22 06:08:18,640 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 06:08:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91954 states. [2020-12-22 06:08:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91954 to 91948. [2020-12-22 06:08:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91948 states. [2020-12-22 06:08:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91948 states to 91948 states and 168082 transitions. [2020-12-22 06:08:24,262 INFO L78 Accepts]: Start accepts. Automaton has 91948 states and 168082 transitions. Word has length 71 [2020-12-22 06:08:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:24,263 INFO L481 AbstractCegarLoop]: Abstraction has 91948 states and 168082 transitions. [2020-12-22 06:08:24,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 91948 states and 168082 transitions. [2020-12-22 06:08:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 06:08:24,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:24,266 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] [2020-12-22 06:08:24,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:08:24,267 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash -313164538, now seen corresponding path program 1 times [2020-12-22 06:08:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64980533] [2020-12-22 06:08:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:24,548 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 06:08:24,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64980533] [2020-12-22 06:08:24,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:24,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:08:24,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917920563] [2020-12-22 06:08:24,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:08:24,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:24,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:08:24,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:08:24,550 INFO L87 Difference]: Start difference. First operand 91948 states and 168082 transitions. Second operand 3 states. [2020-12-22 06:08:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:08:34,625 INFO L93 Difference]: Finished difference Result 264590 states and 483193 transitions. [2020-12-22 06:08:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:08:34,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 06:08:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:08:35,121 INFO L225 Difference]: With dead ends: 264590 [2020-12-22 06:08:35,121 INFO L226 Difference]: Without dead ends: 181290 [2020-12-22 06:08:35,212 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 06:08:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181290 states. [2020-12-22 06:08:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181290 to 181282. [2020-12-22 06:08:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181282 states. [2020-12-22 06:08:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181282 states to 181282 states and 331334 transitions. [2020-12-22 06:08:46,133 INFO L78 Accepts]: Start accepts. Automaton has 181282 states and 331334 transitions. Word has length 72 [2020-12-22 06:08:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:08:46,133 INFO L481 AbstractCegarLoop]: Abstraction has 181282 states and 331334 transitions. [2020-12-22 06:08:46,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:08:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 181282 states and 331334 transitions. [2020-12-22 06:08:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 06:08:46,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:08:46,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:08:46,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:08:46,145 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:08:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:08:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1684475, now seen corresponding path program 1 times [2020-12-22 06:08:46,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:08:46,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149821898] [2020-12-22 06:08:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:08:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:08:46,228 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 06:08:46,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149821898] [2020-12-22 06:08:46,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:08:46,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:08:46,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596818958] [2020-12-22 06:08:46,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:08:46,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:08:46,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:08:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:08:46,230 INFO L87 Difference]: Start difference. First operand 181282 states and 331334 transitions. Second operand 4 states. [2020-12-22 06:09:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:09:03,147 INFO L93 Difference]: Finished difference Result 441323 states and 800092 transitions. [2020-12-22 06:09:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:09:03,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 06:09:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:09:03,798 INFO L225 Difference]: With dead ends: 441323 [2020-12-22 06:09:03,798 INFO L226 Difference]: Without dead ends: 260524 [2020-12-22 06:09:03,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 06:09:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260524 states. [2020-12-22 06:09:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260524 to 181476. [2020-12-22 06:09:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181476 states. [2020-12-22 06:09:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181476 states to 181476 states and 331528 transitions. [2020-12-22 06:09:15,641 INFO L78 Accepts]: Start accepts. Automaton has 181476 states and 331528 transitions. Word has length 105 [2020-12-22 06:09:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:09:15,641 INFO L481 AbstractCegarLoop]: Abstraction has 181476 states and 331528 transitions. [2020-12-22 06:09:15,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:09:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 181476 states and 331528 transitions. [2020-12-22 06:09:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 06:09:15,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:09:15,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:09:15,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 06:09:15,657 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:09:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:09:15,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1297115406, now seen corresponding path program 1 times [2020-12-22 06:09:15,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:09:15,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850486498] [2020-12-22 06:09:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:09:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:09:15,734 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 06:09:15,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850486498] [2020-12-22 06:09:15,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:09:15,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:09:15,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584227313] [2020-12-22 06:09:15,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:09:15,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:09:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:09:15,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:09:15,736 INFO L87 Difference]: Start difference. First operand 181476 states and 331528 transitions. Second operand 5 states. [2020-12-22 06:09:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:09:27,850 INFO L93 Difference]: Finished difference Result 372155 states and 680231 transitions. [2020-12-22 06:09:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:09:27,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-12-22 06:09:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:09:28,347 INFO L225 Difference]: With dead ends: 372155 [2020-12-22 06:09:28,348 INFO L226 Difference]: Without dead ends: 191791 [2020-12-22 06:09:28,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 06:09:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191791 states. [2020-12-22 06:09:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191791 to 181476. [2020-12-22 06:09:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181476 states.