/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/systemc/token_ring.09.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:15,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:15,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:15,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:15,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:15,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:15,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:15,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:15,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:15,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:15,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:15,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:10:15,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:10:15,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:10:15,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:10:15,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:10:15,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:10:15,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:10:15,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:10:15,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:10:15,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:10:15,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:10:15,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:10:15,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:10:15,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:10:15,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:15,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:15,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:15,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:15,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:15,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:15,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:15,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:15,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:15,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:15,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:15,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:15,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:15,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:15,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:15,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:15,381 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:15,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:15,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:15,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:15,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:15,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:15,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:15,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:15,385 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:15,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:15,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:15,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:15,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:15,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:15,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:15,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:15,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:15,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:15,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:15,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:15,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:15,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:15,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:15,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:15,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:15,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:15,827 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:15,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2020-12-22 07:10:15,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e694c8d5/197a15e6d7fe47f2ba0b9b4007883e36/FLAGbfe52c5f4 [2020-12-22 07:10:16,743 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:16,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2020-12-22 07:10:16,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e694c8d5/197a15e6d7fe47f2ba0b9b4007883e36/FLAGbfe52c5f4 [2020-12-22 07:10:17,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e694c8d5/197a15e6d7fe47f2ba0b9b4007883e36 [2020-12-22 07:10:17,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:17,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:17,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:17,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:17,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:17,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f604163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17, skipping insertion in model container [2020-12-22 07:10:17,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:17,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:17,362 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/systemc/token_ring.09.cil-1.c[366,379] [2020-12-22 07:10:17,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:17,533 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:17,547 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/systemc/token_ring.09.cil-1.c[366,379] [2020-12-22 07:10:17,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:17,725 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:17,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17 WrapperNode [2020-12-22 07:10:17,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:17,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:17,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:17,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:17,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:17,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:17,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:17,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:17,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:17,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:18,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:18,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (1/1) ... [2020-12-22 07:10:18,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:18,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:18,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:18,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:18,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (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 07:10:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:18,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:18,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:20,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:20,295 INFO L299 CfgBuilder]: Removed 376 assume(true) statements. [2020-12-22 07:10:20,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:20 BoogieIcfgContainer [2020-12-22 07:10:20,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:20,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:20,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:20,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:20,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:17" (1/3) ... [2020-12-22 07:10:20,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca0a1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:20, skipping insertion in model container [2020-12-22 07:10:20,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:17" (2/3) ... [2020-12-22 07:10:20,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca0a1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:20, skipping insertion in model container [2020-12-22 07:10:20,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:20" (3/3) ... [2020-12-22 07:10:20,311 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-1.c [2020-12-22 07:10:20,317 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:20,323 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:10:20,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:10:20,376 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:20,377 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:20,377 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:20,377 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:20,377 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:20,377 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:20,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:20,378 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states. [2020-12-22 07:10:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:20,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:20,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:20,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash 63539704, now seen corresponding path program 1 times [2020-12-22 07:10:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:20,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431237941] [2020-12-22 07:10:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:20,784 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 07:10:20,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431237941] [2020-12-22 07:10:20,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:20,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:20,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33192398] [2020-12-22 07:10:20,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:20,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:20,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:20,817 INFO L87 Difference]: Start difference. First operand 1149 states. Second operand 3 states. [2020-12-22 07:10:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:20,974 INFO L93 Difference]: Finished difference Result 2293 states and 3487 transitions. [2020-12-22 07:10:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:20,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:21,000 INFO L225 Difference]: With dead ends: 2293 [2020-12-22 07:10:21,000 INFO L226 Difference]: Without dead ends: 1145 [2020-12-22 07:10:21,008 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 07:10:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-12-22 07:10:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1145. [2020-12-22 07:10:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1145 states. [2020-12-22 07:10:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1717 transitions. [2020-12-22 07:10:21,165 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1717 transitions. Word has length 127 [2020-12-22 07:10:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:21,166 INFO L481 AbstractCegarLoop]: Abstraction has 1145 states and 1717 transitions. [2020-12-22 07:10:21,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1717 transitions. [2020-12-22 07:10:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:21,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:21,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:21,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:21,171 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash -798293898, now seen corresponding path program 1 times [2020-12-22 07:10:21,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:21,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368382105] [2020-12-22 07:10:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:21,325 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 07:10:21,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368382105] [2020-12-22 07:10:21,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:21,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:21,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359856536] [2020-12-22 07:10:21,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:21,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:21,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:21,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:21,331 INFO L87 Difference]: Start difference. First operand 1145 states and 1717 transitions. Second operand 3 states. [2020-12-22 07:10:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:21,391 INFO L93 Difference]: Finished difference Result 2277 states and 3412 transitions. [2020-12-22 07:10:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:21,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:21,398 INFO L225 Difference]: With dead ends: 2277 [2020-12-22 07:10:21,399 INFO L226 Difference]: Without dead ends: 1145 [2020-12-22 07:10:21,401 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 07:10:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-12-22 07:10:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1145. [2020-12-22 07:10:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1145 states. [2020-12-22 07:10:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1716 transitions. [2020-12-22 07:10:21,444 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1716 transitions. Word has length 127 [2020-12-22 07:10:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:21,446 INFO L481 AbstractCegarLoop]: Abstraction has 1145 states and 1716 transitions. [2020-12-22 07:10:21,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1716 transitions. [2020-12-22 07:10:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:21,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:21,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:21,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:21,458 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:21,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1567741172, now seen corresponding path program 1 times [2020-12-22 07:10:21,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:21,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886960532] [2020-12-22 07:10:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:21,661 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 07:10:21,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886960532] [2020-12-22 07:10:21,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:21,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290937240] [2020-12-22 07:10:21,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:21,669 INFO L87 Difference]: Start difference. First operand 1145 states and 1716 transitions. Second operand 3 states. [2020-12-22 07:10:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:21,805 INFO L93 Difference]: Finished difference Result 3227 states and 4822 transitions. [2020-12-22 07:10:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:21,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:21,817 INFO L225 Difference]: With dead ends: 3227 [2020-12-22 07:10:21,817 INFO L226 Difference]: Without dead ends: 2096 [2020-12-22 07:10:21,820 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 07:10:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-12-22 07:10:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2094. [2020-12-22 07:10:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3124 transitions. [2020-12-22 07:10:21,928 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3124 transitions. Word has length 127 [2020-12-22 07:10:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:21,935 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3124 transitions. [2020-12-22 07:10:21,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3124 transitions. [2020-12-22 07:10:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:21,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:21,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:21,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:21,937 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:21,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1325644144, now seen corresponding path program 1 times [2020-12-22 07:10:21,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:21,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454204361] [2020-12-22 07:10:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:22,042 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 07:10:22,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454204361] [2020-12-22 07:10:22,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:22,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:22,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565830709] [2020-12-22 07:10:22,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:22,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:22,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:22,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:22,049 INFO L87 Difference]: Start difference. First operand 2094 states and 3124 transitions. Second operand 4 states. [2020-12-22 07:10:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:22,290 INFO L93 Difference]: Finished difference Result 5123 states and 7633 transitions. [2020-12-22 07:10:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:22,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:22,306 INFO L225 Difference]: With dead ends: 5123 [2020-12-22 07:10:22,306 INFO L226 Difference]: Without dead ends: 3044 [2020-12-22 07:10:22,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2020-12-22 07:10:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2094. [2020-12-22 07:10:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3121 transitions. [2020-12-22 07:10:22,433 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3121 transitions. Word has length 127 [2020-12-22 07:10:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:22,433 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3121 transitions. [2020-12-22 07:10:22,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3121 transitions. [2020-12-22 07:10:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:22,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:22,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:22,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:22,436 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1242178190, now seen corresponding path program 1 times [2020-12-22 07:10:22,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:22,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55924920] [2020-12-22 07:10:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:22,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55924920] [2020-12-22 07:10:22,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:22,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:22,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826871599] [2020-12-22 07:10:22,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:22,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:22,533 INFO L87 Difference]: Start difference. First operand 2094 states and 3121 transitions. Second operand 4 states. [2020-12-22 07:10:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:22,769 INFO L93 Difference]: Finished difference Result 5121 states and 7623 transitions. [2020-12-22 07:10:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:22,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:22,794 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 07:10:22,795 INFO L226 Difference]: Without dead ends: 3043 [2020-12-22 07:10:22,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2020-12-22 07:10:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 2094. [2020-12-22 07:10:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3118 transitions. [2020-12-22 07:10:23,048 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3118 transitions. Word has length 127 [2020-12-22 07:10:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:23,049 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3118 transitions. [2020-12-22 07:10:23,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3118 transitions. [2020-12-22 07:10:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:23,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:23,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:23,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:23,053 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash -770821840, now seen corresponding path program 1 times [2020-12-22 07:10:23,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:23,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374600023] [2020-12-22 07:10:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:23,188 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 07:10:23,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374600023] [2020-12-22 07:10:23,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:23,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:23,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565778992] [2020-12-22 07:10:23,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:23,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:23,195 INFO L87 Difference]: Start difference. First operand 2094 states and 3118 transitions. Second operand 4 states. [2020-12-22 07:10:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:23,510 INFO L93 Difference]: Finished difference Result 5119 states and 7613 transitions. [2020-12-22 07:10:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:23,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:23,528 INFO L225 Difference]: With dead ends: 5119 [2020-12-22 07:10:23,528 INFO L226 Difference]: Without dead ends: 3042 [2020-12-22 07:10:23,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-12-22 07:10:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2094. [2020-12-22 07:10:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3115 transitions. [2020-12-22 07:10:23,723 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3115 transitions. Word has length 127 [2020-12-22 07:10:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:23,723 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3115 transitions. [2020-12-22 07:10:23,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3115 transitions. [2020-12-22 07:10:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:23,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:23,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:23,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:10:23,725 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1876782514, now seen corresponding path program 1 times [2020-12-22 07:10:23,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:23,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176297809] [2020-12-22 07:10:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:23,825 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 07:10:23,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176297809] [2020-12-22 07:10:23,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:23,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:23,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530489104] [2020-12-22 07:10:23,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:23,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:23,829 INFO L87 Difference]: Start difference. First operand 2094 states and 3115 transitions. Second operand 3 states. [2020-12-22 07:10:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:23,962 INFO L93 Difference]: Finished difference Result 4170 states and 6203 transitions. [2020-12-22 07:10:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:23,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:23,974 INFO L225 Difference]: With dead ends: 4170 [2020-12-22 07:10:23,974 INFO L226 Difference]: Without dead ends: 2094 [2020-12-22 07:10:23,980 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 07:10:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-22 07:10:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2094. [2020-12-22 07:10:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3107 transitions. [2020-12-22 07:10:24,108 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3107 transitions. Word has length 127 [2020-12-22 07:10:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:24,108 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3107 transitions. [2020-12-22 07:10:24,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3107 transitions. [2020-12-22 07:10:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:24,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:24,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:24,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:10:24,110 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash -231935954, now seen corresponding path program 1 times [2020-12-22 07:10:24,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:24,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122547966] [2020-12-22 07:10:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:24,175 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 07:10:24,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122547966] [2020-12-22 07:10:24,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:24,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:24,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131723287] [2020-12-22 07:10:24,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:24,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:24,178 INFO L87 Difference]: Start difference. First operand 2094 states and 3107 transitions. Second operand 3 states. [2020-12-22 07:10:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:24,340 INFO L93 Difference]: Finished difference Result 4169 states and 6186 transitions. [2020-12-22 07:10:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:24,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:24,352 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 07:10:24,352 INFO L226 Difference]: Without dead ends: 2094 [2020-12-22 07:10:24,356 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 07:10:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-22 07:10:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2094. [2020-12-22 07:10:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3099 transitions. [2020-12-22 07:10:24,485 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3099 transitions. Word has length 127 [2020-12-22 07:10:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:24,485 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3099 transitions. [2020-12-22 07:10:24,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3099 transitions. [2020-12-22 07:10:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:24,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:24,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:24,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:10:24,488 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash 115682866, now seen corresponding path program 1 times [2020-12-22 07:10:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:24,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462163104] [2020-12-22 07:10:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:24,553 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 07:10:24,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462163104] [2020-12-22 07:10:24,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:24,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:24,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003767488] [2020-12-22 07:10:24,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:24,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:24,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:24,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:24,562 INFO L87 Difference]: Start difference. First operand 2094 states and 3099 transitions. Second operand 4 states. [2020-12-22 07:10:24,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:24,840 INFO L93 Difference]: Finished difference Result 5113 states and 7561 transitions. [2020-12-22 07:10:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:24,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:24,855 INFO L225 Difference]: With dead ends: 5113 [2020-12-22 07:10:24,856 INFO L226 Difference]: Without dead ends: 3039 [2020-12-22 07:10:24,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2020-12-22 07:10:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2094. [2020-12-22 07:10:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3096 transitions. [2020-12-22 07:10:25,063 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3096 transitions. Word has length 127 [2020-12-22 07:10:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:25,068 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3096 transitions. [2020-12-22 07:10:25,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3096 transitions. [2020-12-22 07:10:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:25,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:25,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:25,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:10:25,071 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1857482512, now seen corresponding path program 1 times [2020-12-22 07:10:25,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:25,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581367112] [2020-12-22 07:10:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:25,153 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 07:10:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581367112] [2020-12-22 07:10:25,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:25,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:25,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248945340] [2020-12-22 07:10:25,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:25,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:25,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:25,156 INFO L87 Difference]: Start difference. First operand 2094 states and 3096 transitions. Second operand 4 states. [2020-12-22 07:10:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:25,468 INFO L93 Difference]: Finished difference Result 5109 states and 7547 transitions. [2020-12-22 07:10:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:25,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:25,486 INFO L225 Difference]: With dead ends: 5109 [2020-12-22 07:10:25,486 INFO L226 Difference]: Without dead ends: 3037 [2020-12-22 07:10:25,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2020-12-22 07:10:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2094. [2020-12-22 07:10:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3093 transitions. [2020-12-22 07:10:25,641 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3093 transitions. Word has length 127 [2020-12-22 07:10:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:25,641 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3093 transitions. [2020-12-22 07:10:25,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3093 transitions. [2020-12-22 07:10:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:25,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:25,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:25,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:10:25,644 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1814203182, now seen corresponding path program 1 times [2020-12-22 07:10:25,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:25,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707993242] [2020-12-22 07:10:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:25,724 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 07:10:25,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707993242] [2020-12-22 07:10:25,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:25,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851239934] [2020-12-22 07:10:25,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:25,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:25,727 INFO L87 Difference]: Start difference. First operand 2094 states and 3093 transitions. Second operand 4 states. [2020-12-22 07:10:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:25,995 INFO L93 Difference]: Finished difference Result 5107 states and 7537 transitions. [2020-12-22 07:10:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:25,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:26,011 INFO L225 Difference]: With dead ends: 5107 [2020-12-22 07:10:26,011 INFO L226 Difference]: Without dead ends: 3036 [2020-12-22 07:10:26,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-12-22 07:10:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2094. [2020-12-22 07:10:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3090 transitions. [2020-12-22 07:10:26,164 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3090 transitions. Word has length 127 [2020-12-22 07:10:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:26,165 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3090 transitions. [2020-12-22 07:10:26,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3090 transitions. [2020-12-22 07:10:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:26,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:26,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:26,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:10:26,167 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:26,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:26,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1932644656, now seen corresponding path program 1 times [2020-12-22 07:10:26,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:26,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788498066] [2020-12-22 07:10:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:26,218 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 07:10:26,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788498066] [2020-12-22 07:10:26,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:26,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023004874] [2020-12-22 07:10:26,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:26,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:26,221 INFO L87 Difference]: Start difference. First operand 2094 states and 3090 transitions. Second operand 4 states. [2020-12-22 07:10:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:26,606 INFO L93 Difference]: Finished difference Result 5035 states and 7427 transitions. [2020-12-22 07:10:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:26,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:26,617 INFO L225 Difference]: With dead ends: 5035 [2020-12-22 07:10:26,617 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 07:10:26,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 07:10:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2094. [2020-12-22 07:10:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3087 transitions. [2020-12-22 07:10:26,779 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3087 transitions. Word has length 127 [2020-12-22 07:10:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:26,780 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3087 transitions. [2020-12-22 07:10:26,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3087 transitions. [2020-12-22 07:10:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:26,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:26,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:10:26,782 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash -973028626, now seen corresponding path program 1 times [2020-12-22 07:10:26,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:26,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549153269] [2020-12-22 07:10:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:26,835 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 07:10:26,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549153269] [2020-12-22 07:10:26,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:26,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:26,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15551396] [2020-12-22 07:10:26,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:26,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:26,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:26,837 INFO L87 Difference]: Start difference. First operand 2094 states and 3087 transitions. Second operand 4 states. [2020-12-22 07:10:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:27,195 INFO L93 Difference]: Finished difference Result 5033 states and 7417 transitions. [2020-12-22 07:10:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:27,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:27,203 INFO L225 Difference]: With dead ends: 5033 [2020-12-22 07:10:27,203 INFO L226 Difference]: Without dead ends: 2964 [2020-12-22 07:10:27,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2020-12-22 07:10:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2094. [2020-12-22 07:10:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3084 transitions. [2020-12-22 07:10:27,361 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3084 transitions. Word has length 127 [2020-12-22 07:10:27,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:27,362 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3084 transitions. [2020-12-22 07:10:27,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3084 transitions. [2020-12-22 07:10:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:27,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:27,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:27,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:10:27,364 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1288544624, now seen corresponding path program 1 times [2020-12-22 07:10:27,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:27,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405017082] [2020-12-22 07:10:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:27,413 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 07:10:27,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405017082] [2020-12-22 07:10:27,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:27,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:27,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381979760] [2020-12-22 07:10:27,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:27,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:27,416 INFO L87 Difference]: Start difference. First operand 2094 states and 3084 transitions. Second operand 3 states. [2020-12-22 07:10:27,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:27,606 INFO L93 Difference]: Finished difference Result 4162 states and 6132 transitions. [2020-12-22 07:10:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:27,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:10:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:27,615 INFO L225 Difference]: With dead ends: 4162 [2020-12-22 07:10:27,615 INFO L226 Difference]: Without dead ends: 2094 [2020-12-22 07:10:27,622 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 07:10:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2020-12-22 07:10:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2094. [2020-12-22 07:10:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3054 transitions. [2020-12-22 07:10:27,826 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3054 transitions. Word has length 127 [2020-12-22 07:10:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:27,827 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3054 transitions. [2020-12-22 07:10:27,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3054 transitions. [2020-12-22 07:10:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:27,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:27,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:27,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:10:27,830 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:27,831 INFO L82 PathProgramCache]: Analyzing trace with hash -359309332, now seen corresponding path program 1 times [2020-12-22 07:10:27,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:27,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187121467] [2020-12-22 07:10:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:27,905 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 07:10:27,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187121467] [2020-12-22 07:10:27,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:27,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:27,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256126658] [2020-12-22 07:10:27,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:27,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:27,909 INFO L87 Difference]: Start difference. First operand 2094 states and 3054 transitions. Second operand 4 states. [2020-12-22 07:10:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:28,295 INFO L93 Difference]: Finished difference Result 5029 states and 7333 transitions. [2020-12-22 07:10:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:28,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:28,302 INFO L225 Difference]: With dead ends: 5029 [2020-12-22 07:10:28,303 INFO L226 Difference]: Without dead ends: 2962 [2020-12-22 07:10:28,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:28,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-12-22 07:10:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2094. [2020-12-22 07:10:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3051 transitions. [2020-12-22 07:10:28,467 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3051 transitions. Word has length 127 [2020-12-22 07:10:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:28,467 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3051 transitions. [2020-12-22 07:10:28,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3051 transitions. [2020-12-22 07:10:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:28,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:28,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:28,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:10:28,470 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1666451730, now seen corresponding path program 1 times [2020-12-22 07:10:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:28,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695113299] [2020-12-22 07:10:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:28,523 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 07:10:28,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695113299] [2020-12-22 07:10:28,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:28,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:28,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378006563] [2020-12-22 07:10:28,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:28,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:28,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:28,525 INFO L87 Difference]: Start difference. First operand 2094 states and 3051 transitions. Second operand 4 states. [2020-12-22 07:10:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:28,917 INFO L93 Difference]: Finished difference Result 5027 states and 7323 transitions. [2020-12-22 07:10:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:28,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:28,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:28,924 INFO L225 Difference]: With dead ends: 5027 [2020-12-22 07:10:28,925 INFO L226 Difference]: Without dead ends: 2961 [2020-12-22 07:10:28,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2020-12-22 07:10:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2094. [2020-12-22 07:10:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3048 transitions. [2020-12-22 07:10:29,095 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3048 transitions. Word has length 127 [2020-12-22 07:10:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:29,096 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3048 transitions. [2020-12-22 07:10:29,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3048 transitions. [2020-12-22 07:10:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:29,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:29,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:29,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:10:29,098 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash 231045036, now seen corresponding path program 1 times [2020-12-22 07:10:29,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:29,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941193064] [2020-12-22 07:10:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:29,150 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 07:10:29,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941193064] [2020-12-22 07:10:29,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:29,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:29,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148414997] [2020-12-22 07:10:29,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:29,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:29,152 INFO L87 Difference]: Start difference. First operand 2094 states and 3048 transitions. Second operand 4 states. [2020-12-22 07:10:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:29,534 INFO L93 Difference]: Finished difference Result 5023 states and 7309 transitions. [2020-12-22 07:10:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:29,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:29,541 INFO L225 Difference]: With dead ends: 5023 [2020-12-22 07:10:29,541 INFO L226 Difference]: Without dead ends: 2959 [2020-12-22 07:10:29,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2020-12-22 07:10:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2094. [2020-12-22 07:10:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3045 transitions. [2020-12-22 07:10:29,698 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3045 transitions. Word has length 127 [2020-12-22 07:10:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:29,699 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3045 transitions. [2020-12-22 07:10:29,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3045 transitions. [2020-12-22 07:10:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:29,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:29,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:29,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:10:29,701 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:29,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1675358230, now seen corresponding path program 1 times [2020-12-22 07:10:29,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:29,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367180287] [2020-12-22 07:10:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:29,758 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 07:10:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367180287] [2020-12-22 07:10:29,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:29,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:29,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190137401] [2020-12-22 07:10:29,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:29,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:29,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:29,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:29,761 INFO L87 Difference]: Start difference. First operand 2094 states and 3045 transitions. Second operand 4 states. [2020-12-22 07:10:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:30,130 INFO L93 Difference]: Finished difference Result 5021 states and 7299 transitions. [2020-12-22 07:10:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:30,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:30,137 INFO L225 Difference]: With dead ends: 5021 [2020-12-22 07:10:30,137 INFO L226 Difference]: Without dead ends: 2958 [2020-12-22 07:10:30,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-12-22 07:10:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2094. [2020-12-22 07:10:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3042 transitions. [2020-12-22 07:10:30,308 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3042 transitions. Word has length 127 [2020-12-22 07:10:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:30,308 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3042 transitions. [2020-12-22 07:10:30,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3042 transitions. [2020-12-22 07:10:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:30,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:30,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:30,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:10:30,311 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash -74287124, now seen corresponding path program 1 times [2020-12-22 07:10:30,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:30,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384756281] [2020-12-22 07:10:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:30,363 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 07:10:30,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384756281] [2020-12-22 07:10:30,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:30,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:30,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291089645] [2020-12-22 07:10:30,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:30,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:30,365 INFO L87 Difference]: Start difference. First operand 2094 states and 3042 transitions. Second operand 4 states. [2020-12-22 07:10:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:30,745 INFO L93 Difference]: Finished difference Result 5019 states and 7289 transitions. [2020-12-22 07:10:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:30,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:30,754 INFO L225 Difference]: With dead ends: 5019 [2020-12-22 07:10:30,754 INFO L226 Difference]: Without dead ends: 2957 [2020-12-22 07:10:30,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2020-12-22 07:10:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2094. [2020-12-22 07:10:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3039 transitions. [2020-12-22 07:10:30,999 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3039 transitions. Word has length 127 [2020-12-22 07:10:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:30,999 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3039 transitions. [2020-12-22 07:10:31,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3039 transitions. [2020-12-22 07:10:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:31,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:31,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:31,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:10:31,002 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1131018326, now seen corresponding path program 1 times [2020-12-22 07:10:31,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:31,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004956330] [2020-12-22 07:10:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:31,082 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 07:10:31,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004956330] [2020-12-22 07:10:31,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:31,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:31,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195616344] [2020-12-22 07:10:31,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:31,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:31,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:31,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:31,085 INFO L87 Difference]: Start difference. First operand 2094 states and 3039 transitions. Second operand 4 states. [2020-12-22 07:10:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:31,479 INFO L93 Difference]: Finished difference Result 5017 states and 7279 transitions. [2020-12-22 07:10:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:31,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:31,487 INFO L225 Difference]: With dead ends: 5017 [2020-12-22 07:10:31,487 INFO L226 Difference]: Without dead ends: 2956 [2020-12-22 07:10:31,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2020-12-22 07:10:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2094. [2020-12-22 07:10:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2020-12-22 07:10:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 3036 transitions. [2020-12-22 07:10:31,697 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 3036 transitions. Word has length 127 [2020-12-22 07:10:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:31,697 INFO L481 AbstractCegarLoop]: Abstraction has 2094 states and 3036 transitions. [2020-12-22 07:10:31,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 3036 transitions. [2020-12-22 07:10:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:10:31,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:31,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:31,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:10:31,700 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 220366892, now seen corresponding path program 1 times [2020-12-22 07:10:31,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:31,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194169075] [2020-12-22 07:10:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:31,758 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 07:10:31,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194169075] [2020-12-22 07:10:31,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:31,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:31,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455784046] [2020-12-22 07:10:31,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:31,760 INFO L87 Difference]: Start difference. First operand 2094 states and 3036 transitions. Second operand 4 states. [2020-12-22 07:10:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:32,408 INFO L93 Difference]: Finished difference Result 7864 states and 11375 transitions. [2020-12-22 07:10:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:32,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 07:10:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:32,423 INFO L225 Difference]: With dead ends: 7864 [2020-12-22 07:10:32,423 INFO L226 Difference]: Without dead ends: 5805 [2020-12-22 07:10:32,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2020-12-22 07:10:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5535. [2020-12-22 07:10:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5535 states. [2020-12-22 07:10:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5535 states to 5535 states and 7943 transitions. [2020-12-22 07:10:32,840 INFO L78 Accepts]: Start accepts. Automaton has 5535 states and 7943 transitions. Word has length 127 [2020-12-22 07:10:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:32,840 INFO L481 AbstractCegarLoop]: Abstraction has 5535 states and 7943 transitions. [2020-12-22 07:10:32,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5535 states and 7943 transitions. [2020-12-22 07:10:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:10:32,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:32,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:32,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:10:32,844 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2100467592, now seen corresponding path program 1 times [2020-12-22 07:10:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:32,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544948449] [2020-12-22 07:10:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:32,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544948449] [2020-12-22 07:10:32,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:32,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:32,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076186654] [2020-12-22 07:10:32,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:32,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:32,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:32,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:32,904 INFO L87 Difference]: Start difference. First operand 5535 states and 7943 transitions. Second operand 5 states. [2020-12-22 07:10:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:33,974 INFO L93 Difference]: Finished difference Result 14599 states and 20993 transitions. [2020-12-22 07:10:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:33,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-12-22 07:10:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:33,996 INFO L225 Difference]: With dead ends: 14599 [2020-12-22 07:10:33,996 INFO L226 Difference]: Without dead ends: 9109 [2020-12-22 07:10:34,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:10:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9109 states. [2020-12-22 07:10:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9109 to 5604. [2020-12-22 07:10:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5604 states. [2020-12-22 07:10:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 7971 transitions. [2020-12-22 07:10:34,615 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 7971 transitions. Word has length 147 [2020-12-22 07:10:34,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:34,615 INFO L481 AbstractCegarLoop]: Abstraction has 5604 states and 7971 transitions. [2020-12-22 07:10:34,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 7971 transitions. [2020-12-22 07:10:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:10:34,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:34,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:34,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:10:34,618 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash 67073546, now seen corresponding path program 1 times [2020-12-22 07:10:34,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:34,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521478786] [2020-12-22 07:10:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:34,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521478786] [2020-12-22 07:10:34,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:34,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388082167] [2020-12-22 07:10:34,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:34,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:34,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:34,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:34,685 INFO L87 Difference]: Start difference. First operand 5604 states and 7971 transitions. Second operand 5 states. [2020-12-22 07:10:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:35,329 INFO L93 Difference]: Finished difference Result 12272 states and 17427 transitions. [2020-12-22 07:10:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:35,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-12-22 07:10:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:35,339 INFO L225 Difference]: With dead ends: 12272 [2020-12-22 07:10:35,339 INFO L226 Difference]: Without dead ends: 6720 [2020-12-22 07:10:35,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:10:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2020-12-22 07:10:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 5610. [2020-12-22 07:10:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5610 states. [2020-12-22 07:10:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 7915 transitions. [2020-12-22 07:10:36,008 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 7915 transitions. Word has length 147 [2020-12-22 07:10:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:36,009 INFO L481 AbstractCegarLoop]: Abstraction has 5610 states and 7915 transitions. [2020-12-22 07:10:36,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 7915 transitions. [2020-12-22 07:10:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 07:10:36,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:36,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:36,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:10:36,012 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:36,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1668144652, now seen corresponding path program 1 times [2020-12-22 07:10:36,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:36,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352452402] [2020-12-22 07:10:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:36,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352452402] [2020-12-22 07:10:36,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:36,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:36,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154263577] [2020-12-22 07:10:36,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:36,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:36,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:36,071 INFO L87 Difference]: Start difference. First operand 5610 states and 7915 transitions. Second operand 4 states. [2020-12-22 07:10:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:37,388 INFO L93 Difference]: Finished difference Result 21413 states and 30174 transitions. [2020-12-22 07:10:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:37,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-12-22 07:10:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:37,403 INFO L225 Difference]: With dead ends: 21413 [2020-12-22 07:10:37,404 INFO L226 Difference]: Without dead ends: 15857 [2020-12-22 07:10:37,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15857 states. [2020-12-22 07:10:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15857 to 15245. [2020-12-22 07:10:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15245 states. [2020-12-22 07:10:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15245 states to 15245 states and 21330 transitions. [2020-12-22 07:10:38,922 INFO L78 Accepts]: Start accepts. Automaton has 15245 states and 21330 transitions. Word has length 147 [2020-12-22 07:10:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:38,923 INFO L481 AbstractCegarLoop]: Abstraction has 15245 states and 21330 transitions. [2020-12-22 07:10:38,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15245 states and 21330 transitions. [2020-12-22 07:10:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 07:10:38,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:38,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:38,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:10:38,927 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash -80535961, now seen corresponding path program 1 times [2020-12-22 07:10:38,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:38,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948465242] [2020-12-22 07:10:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:38,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948465242] [2020-12-22 07:10:38,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:38,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:38,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208809438] [2020-12-22 07:10:38,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:38,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:38,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:38,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:38,994 INFO L87 Difference]: Start difference. First operand 15245 states and 21330 transitions. Second operand 5 states. [2020-12-22 07:10:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:40,926 INFO L93 Difference]: Finished difference Result 39502 states and 55569 transitions. [2020-12-22 07:10:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:40,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-12-22 07:10:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:40,955 INFO L225 Difference]: With dead ends: 39502 [2020-12-22 07:10:40,955 INFO L226 Difference]: Without dead ends: 24315 [2020-12-22 07:10:40,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:10:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24315 states. [2020-12-22 07:10:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24315 to 15434. [2020-12-22 07:10:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15434 states. [2020-12-22 07:10:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15434 states to 15434 states and 21408 transitions. [2020-12-22 07:10:42,441 INFO L78 Accepts]: Start accepts. Automaton has 15434 states and 21408 transitions. Word has length 151 [2020-12-22 07:10:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:42,442 INFO L481 AbstractCegarLoop]: Abstraction has 15434 states and 21408 transitions. [2020-12-22 07:10:42,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 15434 states and 21408 transitions. [2020-12-22 07:10:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 07:10:42,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:42,449 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:42,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:10:42,449 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1270849257, now seen corresponding path program 1 times [2020-12-22 07:10:42,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:42,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452320349] [2020-12-22 07:10:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:42,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452320349] [2020-12-22 07:10:42,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:42,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:42,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633042090] [2020-12-22 07:10:42,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:42,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:42,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:42,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:42,536 INFO L87 Difference]: Start difference. First operand 15434 states and 21408 transitions. Second operand 5 states. [2020-12-22 07:10:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:45,755 INFO L93 Difference]: Finished difference Result 55050 states and 77133 transitions. [2020-12-22 07:10:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:45,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-12-22 07:10:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:45,796 INFO L225 Difference]: With dead ends: 55050 [2020-12-22 07:10:45,796 INFO L226 Difference]: Without dead ends: 39681 [2020-12-22 07:10:45,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:10:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39681 states. [2020-12-22 07:10:47,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39681 to 15956. [2020-12-22 07:10:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15956 states. [2020-12-22 07:10:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15956 states to 15956 states and 21930 transitions. [2020-12-22 07:10:47,484 INFO L78 Accepts]: Start accepts. Automaton has 15956 states and 21930 transitions. Word has length 151 [2020-12-22 07:10:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:47,485 INFO L481 AbstractCegarLoop]: Abstraction has 15956 states and 21930 transitions. [2020-12-22 07:10:47,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 15956 states and 21930 transitions. [2020-12-22 07:10:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 07:10:47,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:47,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:47,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:10:47,488 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash 500115691, now seen corresponding path program 1 times [2020-12-22 07:10:47,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:47,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444163269] [2020-12-22 07:10:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:47,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444163269] [2020-12-22 07:10:47,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:47,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:47,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301092485] [2020-12-22 07:10:47,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:47,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:47,555 INFO L87 Difference]: Start difference. First operand 15956 states and 21930 transitions. Second operand 4 states. [2020-12-22 07:10:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:52,164 INFO L93 Difference]: Finished difference Result 61037 states and 83841 transitions. [2020-12-22 07:10:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:52,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-12-22 07:10:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:52,218 INFO L225 Difference]: With dead ends: 61037 [2020-12-22 07:10:52,218 INFO L226 Difference]: Without dead ends: 45151 [2020-12-22 07:10:52,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45151 states. [2020-12-22 07:10:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45151 to 43811. [2020-12-22 07:10:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43811 states. [2020-12-22 07:10:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43811 states to 43811 states and 59795 transitions. [2020-12-22 07:10:56,309 INFO L78 Accepts]: Start accepts. Automaton has 43811 states and 59795 transitions. Word has length 151 [2020-12-22 07:10:56,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:56,310 INFO L481 AbstractCegarLoop]: Abstraction has 43811 states and 59795 transitions. [2020-12-22 07:10:56,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 43811 states and 59795 transitions. [2020-12-22 07:10:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 07:10:56,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:56,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:56,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:10:56,315 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:56,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1848351046, now seen corresponding path program 1 times [2020-12-22 07:10:56,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:56,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250127369] [2020-12-22 07:10:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:56,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250127369] [2020-12-22 07:10:56,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:56,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:56,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153046000] [2020-12-22 07:10:56,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:56,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:56,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:56,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:56,380 INFO L87 Difference]: Start difference. First operand 43811 states and 59795 transitions. Second operand 5 states. [2020-12-22 07:11:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,658 INFO L93 Difference]: Finished difference Result 110990 states and 152510 transitions. [2020-12-22 07:11:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:02,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-12-22 07:11:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:02,753 INFO L225 Difference]: With dead ends: 110990 [2020-12-22 07:11:02,753 INFO L226 Difference]: Without dead ends: 67253 [2020-12-22 07:11:02,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67253 states. [2020-12-22 07:11:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67253 to 44330. [2020-12-22 07:11:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44330 states. [2020-12-22 07:11:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44330 states to 44330 states and 60011 transitions. [2020-12-22 07:11:07,286 INFO L78 Accepts]: Start accepts. Automaton has 44330 states and 60011 transitions. Word has length 155 [2020-12-22 07:11:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:07,286 INFO L481 AbstractCegarLoop]: Abstraction has 44330 states and 60011 transitions. [2020-12-22 07:11:07,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 44330 states and 60011 transitions. [2020-12-22 07:11:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 07:11:07,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:07,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:07,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:07,292 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1262074824, now seen corresponding path program 1 times [2020-12-22 07:11:07,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:07,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070055043] [2020-12-22 07:11:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:07,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070055043] [2020-12-22 07:11:07,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:07,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:07,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487696886] [2020-12-22 07:11:07,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:07,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:07,351 INFO L87 Difference]: Start difference. First operand 44330 states and 60011 transitions. Second operand 5 states. [2020-12-22 07:11:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:17,502 INFO L93 Difference]: Finished difference Result 151026 states and 207034 transitions. [2020-12-22 07:11:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:17,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-12-22 07:11:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:17,638 INFO L225 Difference]: With dead ends: 151026 [2020-12-22 07:11:17,638 INFO L226 Difference]: Without dead ends: 106777 [2020-12-22 07:11:17,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106777 states. [2020-12-22 07:11:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106777 to 45758. [2020-12-22 07:11:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45758 states. [2020-12-22 07:11:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45758 states to 45758 states and 61439 transitions. [2020-12-22 07:11:22,952 INFO L78 Accepts]: Start accepts. Automaton has 45758 states and 61439 transitions. Word has length 155 [2020-12-22 07:11:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:22,952 INFO L481 AbstractCegarLoop]: Abstraction has 45758 states and 61439 transitions. [2020-12-22 07:11:22,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 45758 states and 61439 transitions. [2020-12-22 07:11:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 07:11:22,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:22,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:22,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:22,958 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash 204236746, now seen corresponding path program 1 times [2020-12-22 07:11:22,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:22,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163808347] [2020-12-22 07:11:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:23,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163808347] [2020-12-22 07:11:23,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:23,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:23,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797032620] [2020-12-22 07:11:23,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:23,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:23,023 INFO L87 Difference]: Start difference. First operand 45758 states and 61439 transitions. Second operand 4 states. [2020-12-22 07:11:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:35,976 INFO L93 Difference]: Finished difference Result 174369 states and 234140 transitions. [2020-12-22 07:11:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:35,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-12-22 07:11:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:36,143 INFO L225 Difference]: With dead ends: 174369 [2020-12-22 07:11:36,144 INFO L226 Difference]: Without dead ends: 128697 [2020-12-22 07:11:36,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128697 states. [2020-12-22 07:11:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128697 to 125989. [2020-12-22 07:11:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125989 states. [2020-12-22 07:11:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125989 states to 125989 states and 168216 transitions. [2020-12-22 07:11:49,567 INFO L78 Accepts]: Start accepts. Automaton has 125989 states and 168216 transitions. Word has length 155 [2020-12-22 07:11:49,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:49,567 INFO L481 AbstractCegarLoop]: Abstraction has 125989 states and 168216 transitions. [2020-12-22 07:11:49,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 125989 states and 168216 transitions. [2020-12-22 07:11:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 07:11:49,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:49,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:49,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:49,577 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1887348773, now seen corresponding path program 1 times [2020-12-22 07:11:49,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:49,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821834615] [2020-12-22 07:11:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:11:49,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821834615] [2020-12-22 07:11:49,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:49,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:49,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710343211] [2020-12-22 07:11:49,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:49,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:49,692 INFO L87 Difference]: Start difference. First operand 125989 states and 168216 transitions. Second operand 5 states. [2020-12-22 07:12:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:08,950 INFO L93 Difference]: Finished difference Result 312350 states and 419973 transitions. [2020-12-22 07:12:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:08,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-12-22 07:12:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:09,358 INFO L225 Difference]: With dead ends: 312350 [2020-12-22 07:12:09,358 INFO L226 Difference]: Without dead ends: 186451 [2020-12-22 07:12:09,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:12:09,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186451 states. [2020-12-22 07:12:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186451 to 127414. [2020-12-22 07:12:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127414 states. [2020-12-22 07:12:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127414 states to 127414 states and 168814 transitions. [2020-12-22 07:12:24,106 INFO L78 Accepts]: Start accepts. Automaton has 127414 states and 168814 transitions. Word has length 159 [2020-12-22 07:12:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:24,107 INFO L481 AbstractCegarLoop]: Abstraction has 127414 states and 168814 transitions. [2020-12-22 07:12:24,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 127414 states and 168814 transitions. [2020-12-22 07:12:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 07:12:24,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:24,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:24,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:12:24,128 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2127588519, now seen corresponding path program 1 times [2020-12-22 07:12:24,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:24,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029430234] [2020-12-22 07:12:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:12:24,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029430234] [2020-12-22 07:12:24,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:24,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:24,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497158864] [2020-12-22 07:12:24,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:24,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:24,200 INFO L87 Difference]: Start difference. First operand 127414 states and 168814 transitions. Second operand 4 states.