/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_spec9_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:14:23,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:14:23,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:14:23,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:14:23,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:14:23,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:14:23,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:14:23,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:14:23,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:14:23,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:14:23,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:14:23,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:14:23,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:14:23,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:14:23,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:14:23,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:14:23,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:14:23,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:14:23,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:14:23,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:14:23,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:14:23,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:14:23,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:14:23,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:14:23,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 06:14:23,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 06:14:23,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 06:14:23,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 06:14:23,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 06:14:23,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 06:14:23,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:14:23,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:14:23,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:14:23,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:14:23,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:14:23,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:14:23,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:14:23,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:14:23,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:14:23,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:14:23,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:14:23,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:14:23,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:14:23,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:14:23,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:14:23,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:14:23,270 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:14:23,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:14:23,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:14:23,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:14:23,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:14:23,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:14:23,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:14:23,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:14:23,272 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:14:23,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:14:23,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:14:23,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:14:23,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:14:23,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:14:23,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:14:23,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:14:23,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:14:23,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:14:23,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:14:23,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:14:23,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:14:23,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:14:23,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:14:23,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:14:23,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:14:23,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:14:23,731 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:14:23,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2020-12-22 06:14:23,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/691ce0191/c4303e8d15504e06a23c4da63232af0f/FLAG5e77dc8e1 [2020-12-22 06:14:24,649 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:14:24,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2020-12-22 06:14:24,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/691ce0191/c4303e8d15504e06a23c4da63232af0f/FLAG5e77dc8e1 [2020-12-22 06:14:24,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/691ce0191/c4303e8d15504e06a23c4da63232af0f [2020-12-22 06:14:24,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:14:24,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:14:24,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:14:24,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:14:24,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:14:24,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:14:24" (1/1) ... [2020-12-22 06:14:24,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2779df4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:24, skipping insertion in model container [2020-12-22 06:14:24,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:14:24" (1/1) ... [2020-12-22 06:14:24,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:14:24,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:14:25,206 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_spec9_product30.cil.c[11444,11457] [2020-12-22 06:14:25,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:14:25,676 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:14:25,716 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_spec9_product30.cil.c[11444,11457] [2020-12-22 06:14:25,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:14:25,875 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:14:25,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25 WrapperNode [2020-12-22 06:14:25,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:14:25,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:14:25,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:14:25,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:14:25,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:25,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:26,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:14:26,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:14:26,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:14:26,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:14:26,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:26,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:26,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:26,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:26,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:27,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:27,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (1/1) ... [2020-12-22 06:14:27,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:14:27,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:14:27,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:14:27,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:14:27,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (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 06:14:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:14:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:14:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:14:27,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:14:49,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:14:49,577 INFO L299 CfgBuilder]: Removed 1553 assume(true) statements. [2020-12-22 06:14:49,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:49 BoogieIcfgContainer [2020-12-22 06:14:49,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:14:49,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:14:49,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:14:49,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:14:49,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:14:24" (1/3) ... [2020-12-22 06:14:49,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba823e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:49, skipping insertion in model container [2020-12-22 06:14:49,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:14:25" (2/3) ... [2020-12-22 06:14:49,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba823e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:14:49, skipping insertion in model container [2020-12-22 06:14:49,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:14:49" (3/3) ... [2020-12-22 06:14:49,597 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2020-12-22 06:14:49,604 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:14:49,613 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 06:14:49,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 06:14:49,687 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:14:49,687 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:14:49,687 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:14:49,687 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:14:49,688 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:14:49,688 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:14:49,688 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:14:49,688 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:14:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states. [2020-12-22 06:14:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 06:14:49,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:49,802 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] [2020-12-22 06:14:49,802 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 06:14:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 210076529, now seen corresponding path program 1 times [2020-12-22 06:14:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:49,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722083401] [2020-12-22 06:14:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:50,276 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 06:14:50,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722083401] [2020-12-22 06:14:50,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:50,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:14:50,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487819501] [2020-12-22 06:14:50,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:14:50,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:50,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:14:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:50,314 INFO L87 Difference]: Start difference. First operand 6968 states. Second operand 3 states. [2020-12-22 06:14:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:50,786 INFO L93 Difference]: Finished difference Result 13927 states and 26373 transitions. [2020-12-22 06:14:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:14:50,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 06:14:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:50,898 INFO L225 Difference]: With dead ends: 13927 [2020-12-22 06:14:50,899 INFO L226 Difference]: Without dead ends: 6964 [2020-12-22 06:14:50,924 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 06:14:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6964 states. [2020-12-22 06:14:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6964 to 6964. [2020-12-22 06:14:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6964 states. [2020-12-22 06:14:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6964 states to 6964 states and 13177 transitions. [2020-12-22 06:14:51,471 INFO L78 Accepts]: Start accepts. Automaton has 6964 states and 13177 transitions. Word has length 26 [2020-12-22 06:14:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:51,472 INFO L481 AbstractCegarLoop]: Abstraction has 6964 states and 13177 transitions. [2020-12-22 06:14:51,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:14:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6964 states and 13177 transitions. [2020-12-22 06:14:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 06:14:51,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:51,483 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] [2020-12-22 06:14:51,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:14:51,484 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 06:14:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash -982746192, now seen corresponding path program 1 times [2020-12-22 06:14:51,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:51,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901214264] [2020-12-22 06:14:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:51,747 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 06:14:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901214264] [2020-12-22 06:14:51,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:51,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:14:51,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187344611] [2020-12-22 06:14:51,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:14:51,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:51,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:14:51,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:14:51,751 INFO L87 Difference]: Start difference. First operand 6964 states and 13177 transitions. Second operand 6 states. [2020-12-22 06:14:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:52,355 INFO L93 Difference]: Finished difference Result 13879 states and 26270 transitions. [2020-12-22 06:14:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:14:52,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-22 06:14:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:52,407 INFO L225 Difference]: With dead ends: 13879 [2020-12-22 06:14:52,408 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:14:52,426 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 06:14:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:14:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:14:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:14:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13164 transitions. [2020-12-22 06:14:52,742 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13164 transitions. Word has length 33 [2020-12-22 06:14:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:52,742 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13164 transitions. [2020-12-22 06:14:52,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:14:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13164 transitions. [2020-12-22 06:14:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 06:14:52,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:52,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:52,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:14:52,748 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 06:14:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -394981934, now seen corresponding path program 1 times [2020-12-22 06:14:52,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:52,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369002656] [2020-12-22 06:14:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:52,923 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 06:14:52,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369002656] [2020-12-22 06:14:52,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:52,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:52,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822602171] [2020-12-22 06:14:52,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:52,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:52,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:52,928 INFO L87 Difference]: Start difference. First operand 6958 states and 13164 transitions. Second operand 4 states. [2020-12-22 06:14:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:53,511 INFO L93 Difference]: Finished difference Result 13873 states and 26257 transitions. [2020-12-22 06:14:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:53,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-12-22 06:14:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:53,562 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:14:53,563 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:14:53,577 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 06:14:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:14:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:14:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:14:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13160 transitions. [2020-12-22 06:14:53,916 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13160 transitions. Word has length 34 [2020-12-22 06:14:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:53,923 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13160 transitions. [2020-12-22 06:14:53,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13160 transitions. [2020-12-22 06:14:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 06:14:53,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:53,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:53,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:14:53,929 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 06:14:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:53,930 INFO L82 PathProgramCache]: Analyzing trace with hash 970568173, now seen corresponding path program 1 times [2020-12-22 06:14:53,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:53,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832916572] [2020-12-22 06:14:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:14:54,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832916572] [2020-12-22 06:14:54,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:54,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:54,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717533153] [2020-12-22 06:14:54,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:54,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:54,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:54,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:54,051 INFO L87 Difference]: Start difference. First operand 6958 states and 13160 transitions. Second operand 4 states. [2020-12-22 06:14:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:54,652 INFO L93 Difference]: Finished difference Result 13873 states and 26253 transitions. [2020-12-22 06:14:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:54,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-12-22 06:14:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:54,707 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:14:54,708 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:14:54,721 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 06:14:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:14:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:14:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:14:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13156 transitions. [2020-12-22 06:14:55,007 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13156 transitions. Word has length 35 [2020-12-22 06:14:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:55,008 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13156 transitions. [2020-12-22 06:14:55,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13156 transitions. [2020-12-22 06:14:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:14:55,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:55,012 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] [2020-12-22 06:14:55,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:14:55,015 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 06:14:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash -337445939, now seen corresponding path program 1 times [2020-12-22 06:14:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:55,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791999198] [2020-12-22 06:14:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:55,125 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 06:14:55,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791999198] [2020-12-22 06:14:55,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:55,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:55,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127783098] [2020-12-22 06:14:55,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:55,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:55,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:55,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:55,130 INFO L87 Difference]: Start difference. First operand 6958 states and 13156 transitions. Second operand 4 states. [2020-12-22 06:14:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:55,572 INFO L93 Difference]: Finished difference Result 13873 states and 26249 transitions. [2020-12-22 06:14:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:55,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:14:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:55,601 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:14:55,602 INFO L226 Difference]: Without dead ends: 6958 [2020-12-22 06:14:55,616 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 06:14:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2020-12-22 06:14:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6958. [2020-12-22 06:14:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6958 states. [2020-12-22 06:14:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 13152 transitions. [2020-12-22 06:14:55,900 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 13152 transitions. Word has length 36 [2020-12-22 06:14:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:55,900 INFO L481 AbstractCegarLoop]: Abstraction has 6958 states and 13152 transitions. [2020-12-22 06:14:55,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 13152 transitions. [2020-12-22 06:14:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 06:14:55,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:55,903 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] [2020-12-22 06:14:55,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:14:55,903 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 06:14:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash 255561549, now seen corresponding path program 1 times [2020-12-22 06:14:55,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:55,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112247265] [2020-12-22 06:14:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:55,998 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 06:14:55,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112247265] [2020-12-22 06:14:55,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:55,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:56,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219702711] [2020-12-22 06:14:56,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:56,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:56,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:56,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:56,002 INFO L87 Difference]: Start difference. First operand 6958 states and 13152 transitions. Second operand 4 states. [2020-12-22 06:14:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:56,330 INFO L93 Difference]: Finished difference Result 13873 states and 26245 transitions. [2020-12-22 06:14:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:56,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 06:14:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:56,357 INFO L225 Difference]: With dead ends: 13873 [2020-12-22 06:14:56,358 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:14:56,373 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 06:14:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:14:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:14:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:14:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13118 transitions. [2020-12-22 06:14:56,652 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13118 transitions. Word has length 36 [2020-12-22 06:14:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:56,652 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13118 transitions. [2020-12-22 06:14:56,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13118 transitions. [2020-12-22 06:14:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 06:14:56,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:56,653 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] [2020-12-22 06:14:56,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:14:56,654 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 06:14:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1373395080, now seen corresponding path program 1 times [2020-12-22 06:14:56,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:56,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164855405] [2020-12-22 06:14:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:56,757 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 06:14:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164855405] [2020-12-22 06:14:56,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:56,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:56,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031851769] [2020-12-22 06:14:56,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:56,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:56,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:56,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:56,760 INFO L87 Difference]: Start difference. First operand 6937 states and 13118 transitions. Second operand 4 states. [2020-12-22 06:14:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:57,102 INFO L93 Difference]: Finished difference Result 13852 states and 26211 transitions. [2020-12-22 06:14:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:57,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 06:14:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:57,127 INFO L225 Difference]: With dead ends: 13852 [2020-12-22 06:14:57,128 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:14:57,143 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 06:14:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:14:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:14:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:14:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13117 transitions. [2020-12-22 06:14:57,542 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13117 transitions. Word has length 37 [2020-12-22 06:14:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:57,543 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13117 transitions. [2020-12-22 06:14:57,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13117 transitions. [2020-12-22 06:14:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 06:14:57,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:57,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:14:57,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:14:57,545 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 06:14:57,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2115502648, now seen corresponding path program 1 times [2020-12-22 06:14:57,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:57,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141738625] [2020-12-22 06:14:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:57,619 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 06:14:57,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141738625] [2020-12-22 06:14:57,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:57,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:14:57,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538211163] [2020-12-22 06:14:57,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:14:57,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:14:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:14:57,622 INFO L87 Difference]: Start difference. First operand 6937 states and 13117 transitions. Second operand 4 states. [2020-12-22 06:14:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:58,025 INFO L93 Difference]: Finished difference Result 13852 states and 26210 transitions. [2020-12-22 06:14:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:14:58,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-12-22 06:14:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:58,051 INFO L225 Difference]: With dead ends: 13852 [2020-12-22 06:14:58,052 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:14:58,066 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 06:14:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:14:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:14:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:14:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13116 transitions. [2020-12-22 06:14:58,390 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13116 transitions. Word has length 38 [2020-12-22 06:14:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:58,391 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13116 transitions. [2020-12-22 06:14:58,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:14:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13116 transitions. [2020-12-22 06:14:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 06:14:58,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:58,392 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] [2020-12-22 06:14:58,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:14:58,393 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 06:14:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash 707423011, now seen corresponding path program 1 times [2020-12-22 06:14:58,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:58,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150430289] [2020-12-22 06:14:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:58,501 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 06:14:58,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150430289] [2020-12-22 06:14:58,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:58,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:14:58,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291628796] [2020-12-22 06:14:58,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:14:58,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:14:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:14:58,504 INFO L87 Difference]: Start difference. First operand 6937 states and 13116 transitions. Second operand 7 states. [2020-12-22 06:14:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:14:59,069 INFO L93 Difference]: Finished difference Result 13846 states and 26198 transitions. [2020-12-22 06:14:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:14:59,070 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-12-22 06:14:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:14:59,093 INFO L225 Difference]: With dead ends: 13846 [2020-12-22 06:14:59,093 INFO L226 Difference]: Without dead ends: 6937 [2020-12-22 06:14:59,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:14:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2020-12-22 06:14:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 6937. [2020-12-22 06:14:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6937 states. [2020-12-22 06:14:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6937 states to 6937 states and 13115 transitions. [2020-12-22 06:14:59,393 INFO L78 Accepts]: Start accepts. Automaton has 6937 states and 13115 transitions. Word has length 39 [2020-12-22 06:14:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:14:59,395 INFO L481 AbstractCegarLoop]: Abstraction has 6937 states and 13115 transitions. [2020-12-22 06:14:59,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:14:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6937 states and 13115 transitions. [2020-12-22 06:14:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:14:59,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:14:59,397 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] [2020-12-22 06:14:59,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:14:59,398 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 06:14:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:14:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash 932455667, now seen corresponding path program 1 times [2020-12-22 06:14:59,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:14:59,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302591597] [2020-12-22 06:14:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:14:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:14:59,509 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 06:14:59,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302591597] [2020-12-22 06:14:59,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:14:59,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:14:59,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243256229] [2020-12-22 06:14:59,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:14:59,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:14:59,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:14:59,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:14:59,512 INFO L87 Difference]: Start difference. First operand 6937 states and 13115 transitions. Second operand 3 states. [2020-12-22 06:15:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:00,507 INFO L93 Difference]: Finished difference Result 15457 states and 29265 transitions. [2020-12-22 06:15:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:00,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 06:15:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:00,548 INFO L225 Difference]: With dead ends: 15457 [2020-12-22 06:15:00,548 INFO L226 Difference]: Without dead ends: 11948 [2020-12-22 06:15:00,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11948 states. [2020-12-22 06:15:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11948 to 9849. [2020-12-22 06:15:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9849 states. [2020-12-22 06:15:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 18637 transitions. [2020-12-22 06:15:00,992 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 18637 transitions. Word has length 40 [2020-12-22 06:15:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:00,992 INFO L481 AbstractCegarLoop]: Abstraction has 9849 states and 18637 transitions. [2020-12-22 06:15:00,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 18637 transitions. [2020-12-22 06:15:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:15:00,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:00,999 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 06:15:00,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:15:00,999 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 06:15:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:01,000 INFO L82 PathProgramCache]: Analyzing trace with hash 927678500, now seen corresponding path program 1 times [2020-12-22 06:15:01,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:01,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572800107] [2020-12-22 06:15:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:01,121 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 06:15:01,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572800107] [2020-12-22 06:15:01,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:01,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:15:01,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182377097] [2020-12-22 06:15:01,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:15:01,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:01,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:15:01,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:15:01,124 INFO L87 Difference]: Start difference. First operand 9849 states and 18637 transitions. Second operand 8 states. [2020-12-22 06:15:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:03,028 INFO L93 Difference]: Finished difference Result 21583 states and 40638 transitions. [2020-12-22 06:15:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:15:03,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-12-22 06:15:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:03,078 INFO L225 Difference]: With dead ends: 21583 [2020-12-22 06:15:03,078 INFO L226 Difference]: Without dead ends: 12965 [2020-12-22 06:15:03,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-12-22 06:15:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12965 states. [2020-12-22 06:15:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12965 to 8085. [2020-12-22 06:15:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8085 states. [2020-12-22 06:15:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 15250 transitions. [2020-12-22 06:15:03,539 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 15250 transitions. Word has length 58 [2020-12-22 06:15:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:03,540 INFO L481 AbstractCegarLoop]: Abstraction has 8085 states and 15250 transitions. [2020-12-22 06:15:03,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:15:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 15250 transitions. [2020-12-22 06:15:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:15:03,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:03,544 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 06:15:03,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 06:15:03,544 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 06:15:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -342036837, now seen corresponding path program 1 times [2020-12-22 06:15:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:03,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769170998] [2020-12-22 06:15:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:03,620 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 06:15:03,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769170998] [2020-12-22 06:15:03,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:03,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294408114] [2020-12-22 06:15:03,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:03,622 INFO L87 Difference]: Start difference. First operand 8085 states and 15250 transitions. Second operand 3 states. [2020-12-22 06:15:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:04,541 INFO L93 Difference]: Finished difference Result 19009 states and 35881 transitions. [2020-12-22 06:15:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:04,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 06:15:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:04,582 INFO L225 Difference]: With dead ends: 19009 [2020-12-22 06:15:04,583 INFO L226 Difference]: Without dead ends: 12207 [2020-12-22 06:15:04,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2020-12-22 06:15:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 12192. [2020-12-22 06:15:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12192 states. [2020-12-22 06:15:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12192 states to 12192 states and 22953 transitions. [2020-12-22 06:15:05,183 INFO L78 Accepts]: Start accepts. Automaton has 12192 states and 22953 transitions. Word has length 59 [2020-12-22 06:15:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:05,183 INFO L481 AbstractCegarLoop]: Abstraction has 12192 states and 22953 transitions. [2020-12-22 06:15:05,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 12192 states and 22953 transitions. [2020-12-22 06:15:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 06:15:05,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:05,187 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 06:15:05,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:15:05,188 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 06:15:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:05,188 INFO L82 PathProgramCache]: Analyzing trace with hash -819862262, now seen corresponding path program 1 times [2020-12-22 06:15:05,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:05,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550462264] [2020-12-22 06:15:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:05,291 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 06:15:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550462264] [2020-12-22 06:15:05,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:05,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274580429] [2020-12-22 06:15:05,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:05,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:05,294 INFO L87 Difference]: Start difference. First operand 12192 states and 22953 transitions. Second operand 3 states. [2020-12-22 06:15:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:06,441 INFO L93 Difference]: Finished difference Result 30622 states and 57681 transitions. [2020-12-22 06:15:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:06,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 06:15:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:06,507 INFO L225 Difference]: With dead ends: 30622 [2020-12-22 06:15:06,507 INFO L226 Difference]: Without dead ends: 20328 [2020-12-22 06:15:06,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20328 states. [2020-12-22 06:15:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20328 to 20313. [2020-12-22 06:15:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20313 states. [2020-12-22 06:15:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20313 states to 20313 states and 38200 transitions. [2020-12-22 06:15:07,413 INFO L78 Accepts]: Start accepts. Automaton has 20313 states and 38200 transitions. Word has length 60 [2020-12-22 06:15:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:07,414 INFO L481 AbstractCegarLoop]: Abstraction has 20313 states and 38200 transitions. [2020-12-22 06:15:07,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 20313 states and 38200 transitions. [2020-12-22 06:15:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:15:07,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:07,418 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] [2020-12-22 06:15:07,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:15:07,418 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 06:15:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:07,419 INFO L82 PathProgramCache]: Analyzing trace with hash -52928106, now seen corresponding path program 1 times [2020-12-22 06:15:07,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:07,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866826164] [2020-12-22 06:15:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:07,487 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 06:15:07,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866826164] [2020-12-22 06:15:07,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:07,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250274342] [2020-12-22 06:15:07,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:07,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:07,490 INFO L87 Difference]: Start difference. First operand 20313 states and 38200 transitions. Second operand 3 states. [2020-12-22 06:15:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:08,930 INFO L93 Difference]: Finished difference Result 53662 states and 100938 transitions. [2020-12-22 06:15:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:08,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 06:15:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:09,025 INFO L225 Difference]: With dead ends: 53662 [2020-12-22 06:15:09,025 INFO L226 Difference]: Without dead ends: 36364 [2020-12-22 06:15:09,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36364 states. [2020-12-22 06:15:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36364 to 36349. [2020-12-22 06:15:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36349 states. [2020-12-22 06:15:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36349 states to 36349 states and 68294 transitions. [2020-12-22 06:15:10,534 INFO L78 Accepts]: Start accepts. Automaton has 36349 states and 68294 transitions. Word has length 61 [2020-12-22 06:15:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:10,535 INFO L481 AbstractCegarLoop]: Abstraction has 36349 states and 68294 transitions. [2020-12-22 06:15:10,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36349 states and 68294 transitions. [2020-12-22 06:15:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 06:15:10,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:10,539 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 06:15:10,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:15:10,539 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 06:15:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:10,540 INFO L82 PathProgramCache]: Analyzing trace with hash 646847397, now seen corresponding path program 1 times [2020-12-22 06:15:10,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:10,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786938642] [2020-12-22 06:15:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:10,635 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 06:15:10,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786938642] [2020-12-22 06:15:10,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:10,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666331947] [2020-12-22 06:15:10,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:10,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:10,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:10,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:10,638 INFO L87 Difference]: Start difference. First operand 36349 states and 68294 transitions. Second operand 3 states. [2020-12-22 06:15:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:13,032 INFO L93 Difference]: Finished difference Result 99330 states and 186603 transitions. [2020-12-22 06:15:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:13,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 06:15:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:13,228 INFO L225 Difference]: With dead ends: 99330 [2020-12-22 06:15:13,229 INFO L226 Difference]: Without dead ends: 68004 [2020-12-22 06:15:13,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68004 states. [2020-12-22 06:15:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68004 to 67989. [2020-12-22 06:15:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67989 states. [2020-12-22 06:15:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67989 states to 67989 states and 127600 transitions. [2020-12-22 06:15:15,655 INFO L78 Accepts]: Start accepts. Automaton has 67989 states and 127600 transitions. Word has length 62 [2020-12-22 06:15:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:15,655 INFO L481 AbstractCegarLoop]: Abstraction has 67989 states and 127600 transitions. [2020-12-22 06:15:15,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 67989 states and 127600 transitions. [2020-12-22 06:15:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:15:15,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:15,660 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 06:15:15,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:15:15,660 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 06:15:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash -735295343, now seen corresponding path program 1 times [2020-12-22 06:15:15,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:15,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250310439] [2020-12-22 06:15:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:15,729 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 06:15:15,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250310439] [2020-12-22 06:15:15,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:15,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 06:15:15,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908372181] [2020-12-22 06:15:15,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:15:15,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:15,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:15:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:15,731 INFO L87 Difference]: Start difference. First operand 67989 states and 127600 transitions. Second operand 3 states. [2020-12-22 06:15:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:19,940 INFO L93 Difference]: Finished difference Result 189802 states and 356072 transitions. [2020-12-22 06:15:19,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:15:19,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 06:15:19,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:20,303 INFO L225 Difference]: With dead ends: 189802 [2020-12-22 06:15:20,303 INFO L226 Difference]: Without dead ends: 130400 [2020-12-22 06:15:20,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:15:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130400 states. [2020-12-22 06:15:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130400 to 130385. [2020-12-22 06:15:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130385 states. [2020-12-22 06:15:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130385 states to 130385 states and 244366 transitions. [2020-12-22 06:15:25,428 INFO L78 Accepts]: Start accepts. Automaton has 130385 states and 244366 transitions. Word has length 63 [2020-12-22 06:15:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:25,436 INFO L481 AbstractCegarLoop]: Abstraction has 130385 states and 244366 transitions. [2020-12-22 06:15:25,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:15:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 130385 states and 244366 transitions. [2020-12-22 06:15:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 06:15:25,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:25,674 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 06:15:25,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:15:25,675 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 06:15:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash -516440625, now seen corresponding path program 1 times [2020-12-22 06:15:25,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:25,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896280594] [2020-12-22 06:15:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:25,779 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 06:15:25,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896280594] [2020-12-22 06:15:25,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:25,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 06:15:25,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545663179] [2020-12-22 06:15:25,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:15:25,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:25,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:15:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:15:25,782 INFO L87 Difference]: Start difference. First operand 130385 states and 244366 transitions. Second operand 5 states. [2020-12-22 06:15:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:15:38,321 INFO L93 Difference]: Finished difference Result 603987 states and 1132633 transitions. [2020-12-22 06:15:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:15:38,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 06:15:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:15:39,552 INFO L225 Difference]: With dead ends: 603987 [2020-12-22 06:15:39,553 INFO L226 Difference]: Without dead ends: 488605 [2020-12-22 06:15:39,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:15:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488605 states. [2020-12-22 06:15:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488605 to 232108. [2020-12-22 06:15:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232108 states. [2020-12-22 06:15:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232108 states to 232108 states and 434253 transitions. [2020-12-22 06:15:50,969 INFO L78 Accepts]: Start accepts. Automaton has 232108 states and 434253 transitions. Word has length 63 [2020-12-22 06:15:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:15:50,969 INFO L481 AbstractCegarLoop]: Abstraction has 232108 states and 434253 transitions. [2020-12-22 06:15:50,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:15:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 232108 states and 434253 transitions. [2020-12-22 06:15:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 06:15:50,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:15:50,972 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 06:15:50,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:15:50,972 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 06:15:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:15:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1968779069, now seen corresponding path program 1 times [2020-12-22 06:15:50,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:15:50,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111964320] [2020-12-22 06:15:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:15:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:15:51,093 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 06:15:51,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111964320] [2020-12-22 06:15:51,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:15:51,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:15:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777077321] [2020-12-22 06:15:51,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:15:51,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:15:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:15:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:15:51,095 INFO L87 Difference]: Start difference. First operand 232108 states and 434253 transitions. Second operand 6 states. [2020-12-22 06:16:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:16:16,413 INFO L93 Difference]: Finished difference Result 1104471 states and 2065717 transitions. [2020-12-22 06:16:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:16:16,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 06:16:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:16:19,119 INFO L225 Difference]: With dead ends: 1104471 [2020-12-22 06:16:19,120 INFO L226 Difference]: Without dead ends: 873046 [2020-12-22 06:16:19,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:16:20,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873046 states. [2020-12-22 06:16:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873046 to 664761. [2020-12-22 06:16:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664761 states. [2020-12-22 06:16:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664761 states to 664761 states and 1241127 transitions. [2020-12-22 06:16:53,227 INFO L78 Accepts]: Start accepts. Automaton has 664761 states and 1241127 transitions. Word has length 65 [2020-12-22 06:16:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:16:53,227 INFO L481 AbstractCegarLoop]: Abstraction has 664761 states and 1241127 transitions. [2020-12-22 06:16:53,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:16:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 664761 states and 1241127 transitions. [2020-12-22 06:16:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 06:16:53,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:16:53,240 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 06:16:53,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:16:53,241 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 06:16:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:16:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash -633837032, now seen corresponding path program 1 times [2020-12-22 06:16:53,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:16:53,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009375738] [2020-12-22 06:16:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:16:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:16:53,346 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 06:16:53,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009375738] [2020-12-22 06:16:53,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:16:53,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:16:53,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97282959] [2020-12-22 06:16:53,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:16:53,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:16:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:16:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:16:53,348 INFO L87 Difference]: Start difference. First operand 664761 states and 1241127 transitions. Second operand 6 states.