/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:00:20,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:00:20,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:00:20,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:00:20,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:00:20,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:00:20,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:00:20,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:00:20,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:00:20,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:00:20,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:00:20,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:00:20,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:00:20,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:00:20,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:00:20,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:00:20,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:00:20,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:00:20,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:00:20,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:00:20,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:00:20,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:00:20,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:00:20,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:00:20,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:00:20,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:00:20,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:00:20,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:00:20,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:00:20,392 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:00:20,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:00:20,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:00:20,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:00:20,398 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:00:20,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:00:20,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:00:20,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:00:20,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:00:20,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:00:20,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:00:20,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:00:20,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:00:20,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:00:20,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:00:20,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:00:20,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:00:20,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:20,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:00:20,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:00:20,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:00:20,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:00:20,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:00:20,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:00:20,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:00:20,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:00:20,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:00:20,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:00:20,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:00:20,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:00:20,864 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:00:20,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:00:20,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c160424/7db1f5045ca146b78f6e340e68d35e15/FLAGcc8eb99a2 [2020-12-22 10:00:21,996 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:00:21,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:00:22,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c160424/7db1f5045ca146b78f6e340e68d35e15/FLAGcc8eb99a2 [2020-12-22 10:00:22,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c160424/7db1f5045ca146b78f6e340e68d35e15 [2020-12-22 10:00:22,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:00:22,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:00:22,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:22,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:00:22,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:00:22,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:22" (1/1) ... [2020-12-22 10:00:22,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba24b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:22, skipping insertion in model container [2020-12-22 10:00:22,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:00:22" (1/1) ... [2020-12-22 10:00:22,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:00:22,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:00:23,154 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[11832,11845] [2020-12-22 10:00:23,301 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[19337,19350] [2020-12-22 10:00:24,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:24,694 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:00:24,780 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[11832,11845] [2020-12-22 10:00:24,803 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[19337,19350] [2020-12-22 10:00:25,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:00:25,528 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:00:25,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25 WrapperNode [2020-12-22 10:00:25,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:00:25,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:25,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:00:25,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:00:25,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:25,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:00:26,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:00:26,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:00:26,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:00:26,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... [2020-12-22 10:00:26,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:00:26,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:00:26,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:00:26,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:00:26,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:00:26,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:00:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:00:26,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:00:26,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:00:33,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:00:33,469 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 10:00:33,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:33 BoogieIcfgContainer [2020-12-22 10:00:33,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:00:33,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:00:33,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:00:33,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:00:33,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:00:22" (1/3) ... [2020-12-22 10:00:33,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696b5a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:33, skipping insertion in model container [2020-12-22 10:00:33,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:00:25" (2/3) ... [2020-12-22 10:00:33,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696b5a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:00:33, skipping insertion in model container [2020-12-22 10:00:33,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:00:33" (3/3) ... [2020-12-22 10:00:33,483 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:00:33,489 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:00:33,495 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:00:33,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:00:33,550 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:00:33,550 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:00:33,551 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:00:33,551 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:00:33,551 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:00:33,551 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:00:33,551 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:00:33,552 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:00:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states. [2020-12-22 10:00:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 10:00:33,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:33,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:33,601 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 10:00:33,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:33,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424194748] [2020-12-22 10:00:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:33,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424194748] [2020-12-22 10:00:33,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:33,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:00:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988735738] [2020-12-22 10:00:33,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:00:33,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:33,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:00:33,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:00:33,886 INFO L87 Difference]: Start difference. First operand 908 states. Second operand 2 states. [2020-12-22 10:00:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:33,988 INFO L93 Difference]: Finished difference Result 1777 states and 3370 transitions. [2020-12-22 10:00:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:00:33,990 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 10:00:33,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:34,042 INFO L225 Difference]: With dead ends: 1777 [2020-12-22 10:00:34,043 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 10:00:34,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:00:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 10:00:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 10:00:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 10:00:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1588 transitions. [2020-12-22 10:00:34,172 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1588 transitions. Word has length 34 [2020-12-22 10:00:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:34,173 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1588 transitions. [2020-12-22 10:00:34,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:00:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1588 transitions. [2020-12-22 10:00:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 10:00:34,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:34,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:34,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:00:34,184 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 10:00:34,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:34,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907830256] [2020-12-22 10:00:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:34,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907830256] [2020-12-22 10:00:34,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:34,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:34,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143631360] [2020-12-22 10:00:34,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:00:34,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:00:34,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:34,467 INFO L87 Difference]: Start difference. First operand 842 states and 1588 transitions. Second operand 5 states. [2020-12-22 10:00:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:34,661 INFO L93 Difference]: Finished difference Result 897 states and 1673 transitions. [2020-12-22 10:00:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:00:34,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 10:00:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:34,669 INFO L225 Difference]: With dead ends: 897 [2020-12-22 10:00:34,670 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 10:00:34,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 10:00:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2020-12-22 10:00:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 10:00:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1557 transitions. [2020-12-22 10:00:34,711 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1557 transitions. Word has length 34 [2020-12-22 10:00:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:34,711 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1557 transitions. [2020-12-22 10:00:34,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:00:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1557 transitions. [2020-12-22 10:00:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:34,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:34,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:34,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:00:34,715 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 10:00:34,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:34,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591678285] [2020-12-22 10:00:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:34,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591678285] [2020-12-22 10:00:34,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:34,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:34,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794514850] [2020-12-22 10:00:34,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:34,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:34,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:34,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:34,890 INFO L87 Difference]: Start difference. First operand 842 states and 1557 transitions. Second operand 3 states. [2020-12-22 10:00:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:34,947 INFO L93 Difference]: Finished difference Result 938 states and 1709 transitions. [2020-12-22 10:00:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:34,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:34,954 INFO L225 Difference]: With dead ends: 938 [2020-12-22 10:00:34,955 INFO L226 Difference]: Without dead ends: 887 [2020-12-22 10:00:34,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2020-12-22 10:00:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 885. [2020-12-22 10:00:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2020-12-22 10:00:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1626 transitions. [2020-12-22 10:00:35,091 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1626 transitions. Word has length 64 [2020-12-22 10:00:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:35,091 INFO L481 AbstractCegarLoop]: Abstraction has 885 states and 1626 transitions. [2020-12-22 10:00:35,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1626 transitions. [2020-12-22 10:00:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:35,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:35,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:35,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:00:35,096 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 10:00:35,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:35,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767765373] [2020-12-22 10:00:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:35,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767765373] [2020-12-22 10:00:35,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:35,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:35,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495053737] [2020-12-22 10:00:35,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:35,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:35,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,266 INFO L87 Difference]: Start difference. First operand 885 states and 1626 transitions. Second operand 3 states. [2020-12-22 10:00:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:35,319 INFO L93 Difference]: Finished difference Result 1061 states and 1906 transitions. [2020-12-22 10:00:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:35,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:35,325 INFO L225 Difference]: With dead ends: 1061 [2020-12-22 10:00:35,326 INFO L226 Difference]: Without dead ends: 967 [2020-12-22 10:00:35,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-12-22 10:00:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 965. [2020-12-22 10:00:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-12-22 10:00:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1753 transitions. [2020-12-22 10:00:35,358 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1753 transitions. Word has length 64 [2020-12-22 10:00:35,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:35,360 INFO L481 AbstractCegarLoop]: Abstraction has 965 states and 1753 transitions. [2020-12-22 10:00:35,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1753 transitions. [2020-12-22 10:00:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:35,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:35,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:35,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:00:35,362 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 10:00:35,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:35,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840958758] [2020-12-22 10:00:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:35,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840958758] [2020-12-22 10:00:35,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:35,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:35,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055535514] [2020-12-22 10:00:35,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:35,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,498 INFO L87 Difference]: Start difference. First operand 965 states and 1753 transitions. Second operand 3 states. [2020-12-22 10:00:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:35,559 INFO L93 Difference]: Finished difference Result 1289 states and 2267 transitions. [2020-12-22 10:00:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:35,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:35,568 INFO L225 Difference]: With dead ends: 1289 [2020-12-22 10:00:35,568 INFO L226 Difference]: Without dead ends: 1115 [2020-12-22 10:00:35,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-12-22 10:00:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1113. [2020-12-22 10:00:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2020-12-22 10:00:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1985 transitions. [2020-12-22 10:00:35,611 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1985 transitions. Word has length 64 [2020-12-22 10:00:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:35,612 INFO L481 AbstractCegarLoop]: Abstraction has 1113 states and 1985 transitions. [2020-12-22 10:00:35,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1985 transitions. [2020-12-22 10:00:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:35,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:35,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:35,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:00:35,614 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 10:00:35,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:35,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370720780] [2020-12-22 10:00:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:35,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370720780] [2020-12-22 10:00:35,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:35,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017377543] [2020-12-22 10:00:35,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:35,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,693 INFO L87 Difference]: Start difference. First operand 1113 states and 1985 transitions. Second operand 3 states. [2020-12-22 10:00:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:35,754 INFO L93 Difference]: Finished difference Result 1709 states and 2923 transitions. [2020-12-22 10:00:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:35,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:35,767 INFO L225 Difference]: With dead ends: 1709 [2020-12-22 10:00:35,767 INFO L226 Difference]: Without dead ends: 1387 [2020-12-22 10:00:35,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2020-12-22 10:00:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1385. [2020-12-22 10:00:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2020-12-22 10:00:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2405 transitions. [2020-12-22 10:00:35,815 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2405 transitions. Word has length 64 [2020-12-22 10:00:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:35,816 INFO L481 AbstractCegarLoop]: Abstraction has 1385 states and 2405 transitions. [2020-12-22 10:00:35,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2405 transitions. [2020-12-22 10:00:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:35,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:35,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:35,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:00:35,818 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 10:00:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:35,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890470814] [2020-12-22 10:00:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890470814] [2020-12-22 10:00:35,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:35,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:35,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038354385] [2020-12-22 10:00:35,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:35,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:35,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:35,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,906 INFO L87 Difference]: Start difference. First operand 1385 states and 2405 transitions. Second operand 3 states. [2020-12-22 10:00:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:35,972 INFO L93 Difference]: Finished difference Result 2477 states and 4103 transitions. [2020-12-22 10:00:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:35,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 10:00:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:35,983 INFO L225 Difference]: With dead ends: 2477 [2020-12-22 10:00:35,983 INFO L226 Difference]: Without dead ends: 1883 [2020-12-22 10:00:35,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2020-12-22 10:00:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1881. [2020-12-22 10:00:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1881 states. [2020-12-22 10:00:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3157 transitions. [2020-12-22 10:00:36,054 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3157 transitions. Word has length 64 [2020-12-22 10:00:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:36,054 INFO L481 AbstractCegarLoop]: Abstraction has 1881 states and 3157 transitions. [2020-12-22 10:00:36,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3157 transitions. [2020-12-22 10:00:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 10:00:36,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:36,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:36,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:00:36,056 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 10:00:36,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:36,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101287092] [2020-12-22 10:00:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:36,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101287092] [2020-12-22 10:00:36,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:36,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:36,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558580252] [2020-12-22 10:00:36,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:36,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:36,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:36,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:36,201 INFO L87 Difference]: Start difference. First operand 1881 states and 3157 transitions. Second operand 7 states. [2020-12-22 10:00:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:37,098 INFO L93 Difference]: Finished difference Result 12781 states and 19967 transitions. [2020-12-22 10:00:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:00:37,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 10:00:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:37,168 INFO L225 Difference]: With dead ends: 12781 [2020-12-22 10:00:37,168 INFO L226 Difference]: Without dead ends: 11691 [2020-12-22 10:00:37,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:00:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2020-12-22 10:00:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 2969. [2020-12-22 10:00:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2969 states. [2020-12-22 10:00:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 4773 transitions. [2020-12-22 10:00:37,492 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 4773 transitions. Word has length 64 [2020-12-22 10:00:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:37,493 INFO L481 AbstractCegarLoop]: Abstraction has 2969 states and 4773 transitions. [2020-12-22 10:00:37,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 4773 transitions. [2020-12-22 10:00:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 10:00:37,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:37,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:37,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:00:37,495 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:37,496 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 10:00:37,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:37,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481140970] [2020-12-22 10:00:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:37,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481140970] [2020-12-22 10:00:37,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:37,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:00:37,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83060394] [2020-12-22 10:00:37,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:37,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:37,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:37,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:37,588 INFO L87 Difference]: Start difference. First operand 2969 states and 4773 transitions. Second operand 3 states. [2020-12-22 10:00:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:37,807 INFO L93 Difference]: Finished difference Result 6159 states and 9593 transitions. [2020-12-22 10:00:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:37,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 10:00:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:37,830 INFO L225 Difference]: With dead ends: 6159 [2020-12-22 10:00:37,830 INFO L226 Difference]: Without dead ends: 3981 [2020-12-22 10:00:37,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2020-12-22 10:00:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3979. [2020-12-22 10:00:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3979 states. [2020-12-22 10:00:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 6247 transitions. [2020-12-22 10:00:38,080 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 6247 transitions. Word has length 66 [2020-12-22 10:00:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:38,081 INFO L481 AbstractCegarLoop]: Abstraction has 3979 states and 6247 transitions. [2020-12-22 10:00:38,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 6247 transitions. [2020-12-22 10:00:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 10:00:38,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:38,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:38,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:00:38,088 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 10:00:38,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:38,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075648513] [2020-12-22 10:00:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:38,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075648513] [2020-12-22 10:00:38,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:38,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:38,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276227319] [2020-12-22 10:00:38,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:38,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:38,314 INFO L87 Difference]: Start difference. First operand 3979 states and 6247 transitions. Second operand 7 states. [2020-12-22 10:00:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:38,733 INFO L93 Difference]: Finished difference Result 7167 states and 11017 transitions. [2020-12-22 10:00:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:38,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 10:00:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:38,747 INFO L225 Difference]: With dead ends: 7167 [2020-12-22 10:00:38,748 INFO L226 Difference]: Without dead ends: 3981 [2020-12-22 10:00:38,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:00:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2020-12-22 10:00:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3979. [2020-12-22 10:00:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3979 states. [2020-12-22 10:00:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 6199 transitions. [2020-12-22 10:00:39,005 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 6199 transitions. Word has length 66 [2020-12-22 10:00:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:39,005 INFO L481 AbstractCegarLoop]: Abstraction has 3979 states and 6199 transitions. [2020-12-22 10:00:39,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 6199 transitions. [2020-12-22 10:00:39,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:39,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:39,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:39,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:00:39,007 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 10:00:39,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:39,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614462713] [2020-12-22 10:00:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:39,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614462713] [2020-12-22 10:00:39,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:39,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:39,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373200348] [2020-12-22 10:00:39,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:39,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:39,235 INFO L87 Difference]: Start difference. First operand 3979 states and 6199 transitions. Second operand 6 states. [2020-12-22 10:00:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:39,635 INFO L93 Difference]: Finished difference Result 7165 states and 10920 transitions. [2020-12-22 10:00:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:39,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 10:00:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:39,647 INFO L225 Difference]: With dead ends: 7165 [2020-12-22 10:00:39,647 INFO L226 Difference]: Without dead ends: 3979 [2020-12-22 10:00:39,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:39,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2020-12-22 10:00:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3979. [2020-12-22 10:00:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3979 states. [2020-12-22 10:00:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 6151 transitions. [2020-12-22 10:00:39,879 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 6151 transitions. Word has length 67 [2020-12-22 10:00:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:39,879 INFO L481 AbstractCegarLoop]: Abstraction has 3979 states and 6151 transitions. [2020-12-22 10:00:39,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 6151 transitions. [2020-12-22 10:00:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:39,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:39,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:39,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:00:39,881 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 10:00:39,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:39,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501819541] [2020-12-22 10:00:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:40,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501819541] [2020-12-22 10:00:40,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:40,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:40,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460864757] [2020-12-22 10:00:40,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:40,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:40,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:40,003 INFO L87 Difference]: Start difference. First operand 3979 states and 6151 transitions. Second operand 6 states. [2020-12-22 10:00:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:40,403 INFO L93 Difference]: Finished difference Result 7165 states and 10824 transitions. [2020-12-22 10:00:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:40,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 10:00:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:40,415 INFO L225 Difference]: With dead ends: 7165 [2020-12-22 10:00:40,415 INFO L226 Difference]: Without dead ends: 3979 [2020-12-22 10:00:40,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2020-12-22 10:00:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3979. [2020-12-22 10:00:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3979 states. [2020-12-22 10:00:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 6103 transitions. [2020-12-22 10:00:40,661 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 6103 transitions. Word has length 67 [2020-12-22 10:00:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:40,662 INFO L481 AbstractCegarLoop]: Abstraction has 3979 states and 6103 transitions. [2020-12-22 10:00:40,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 6103 transitions. [2020-12-22 10:00:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:40,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:40,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:40,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:00:40,664 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 10:00:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:40,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111438526] [2020-12-22 10:00:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:40,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111438526] [2020-12-22 10:00:40,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:40,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:40,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103431322] [2020-12-22 10:00:40,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:00:40,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:40,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:00:40,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:00:40,758 INFO L87 Difference]: Start difference. First operand 3979 states and 6103 transitions. Second operand 5 states. [2020-12-22 10:00:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:41,240 INFO L93 Difference]: Finished difference Result 6758 states and 10013 transitions. [2020-12-22 10:00:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:41,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 10:00:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:41,257 INFO L225 Difference]: With dead ends: 6758 [2020-12-22 10:00:41,258 INFO L226 Difference]: Without dead ends: 6756 [2020-12-22 10:00:41,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:00:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6756 states. [2020-12-22 10:00:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6756 to 4171. [2020-12-22 10:00:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4171 states. [2020-12-22 10:00:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4171 states to 4171 states and 6279 transitions. [2020-12-22 10:00:41,567 INFO L78 Accepts]: Start accepts. Automaton has 4171 states and 6279 transitions. Word has length 67 [2020-12-22 10:00:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:41,568 INFO L481 AbstractCegarLoop]: Abstraction has 4171 states and 6279 transitions. [2020-12-22 10:00:41,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:00:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4171 states and 6279 transitions. [2020-12-22 10:00:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:00:41,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:41,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:41,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:00:41,569 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash 430085756, now seen corresponding path program 1 times [2020-12-22 10:00:41,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:41,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932691457] [2020-12-22 10:00:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932691457] [2020-12-22 10:00:41,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:41,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:00:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253701360] [2020-12-22 10:00:41,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:00:41,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:00:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:00:41,641 INFO L87 Difference]: Start difference. First operand 4171 states and 6279 transitions. Second operand 3 states. [2020-12-22 10:00:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:47,801 INFO L93 Difference]: Finished difference Result 5675 states and 9152 transitions. [2020-12-22 10:00:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:00:47,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 10:00:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:47,815 INFO L225 Difference]: With dead ends: 5675 [2020-12-22 10:00:47,815 INFO L226 Difference]: Without dead ends: 4922 [2020-12-22 10:00:47,817 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 10:00:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4922 states. [2020-12-22 10:00:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4922 to 4922. [2020-12-22 10:00:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4922 states. [2020-12-22 10:00:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 7258 transitions. [2020-12-22 10:00:48,168 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 7258 transitions. Word has length 67 [2020-12-22 10:00:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:48,168 INFO L481 AbstractCegarLoop]: Abstraction has 4922 states and 7258 transitions. [2020-12-22 10:00:48,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:00:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 7258 transitions. [2020-12-22 10:00:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:48,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:48,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:48,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:00:48,175 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash -119875554, now seen corresponding path program 1 times [2020-12-22 10:00:48,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:48,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800727319] [2020-12-22 10:00:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:00:48,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800727319] [2020-12-22 10:00:48,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:48,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:48,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962475431] [2020-12-22 10:00:48,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:48,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:48,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:48,331 INFO L87 Difference]: Start difference. First operand 4922 states and 7258 transitions. Second operand 7 states. [2020-12-22 10:00:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:49,887 INFO L93 Difference]: Finished difference Result 22502 states and 32192 transitions. [2020-12-22 10:00:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:49,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:49,942 INFO L225 Difference]: With dead ends: 22502 [2020-12-22 10:00:49,942 INFO L226 Difference]: Without dead ends: 19124 [2020-12-22 10:00:49,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19124 states. [2020-12-22 10:00:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19124 to 8298. [2020-12-22 10:00:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8298 states. [2020-12-22 10:00:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 12010 transitions. [2020-12-22 10:00:50,622 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 12010 transitions. Word has length 94 [2020-12-22 10:00:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:50,623 INFO L481 AbstractCegarLoop]: Abstraction has 8298 states and 12010 transitions. [2020-12-22 10:00:50,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 12010 transitions. [2020-12-22 10:00:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:50,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:50,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:50,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:00:50,628 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1888658370, now seen corresponding path program 1 times [2020-12-22 10:00:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:50,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243198074] [2020-12-22 10:00:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:00:50,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243198074] [2020-12-22 10:00:50,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:50,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:50,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901386672] [2020-12-22 10:00:50,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:50,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:50,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:50,757 INFO L87 Difference]: Start difference. First operand 8298 states and 12010 transitions. Second operand 7 states. [2020-12-22 10:00:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:51,990 INFO L93 Difference]: Finished difference Result 25878 states and 36944 transitions. [2020-12-22 10:00:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:51,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:52,041 INFO L225 Difference]: With dead ends: 25878 [2020-12-22 10:00:52,041 INFO L226 Difference]: Without dead ends: 22500 [2020-12-22 10:00:52,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22500 states. [2020-12-22 10:00:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22500 to 13370. [2020-12-22 10:00:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13370 states. [2020-12-22 10:00:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 19098 transitions. [2020-12-22 10:00:53,149 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 19098 transitions. Word has length 94 [2020-12-22 10:00:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:53,149 INFO L481 AbstractCegarLoop]: Abstraction has 13370 states and 19098 transitions. [2020-12-22 10:00:53,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 19098 transitions. [2020-12-22 10:00:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:53,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:53,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:53,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:00:53,155 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash -757018530, now seen corresponding path program 1 times [2020-12-22 10:00:53,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:53,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859408765] [2020-12-22 10:00:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:00:53,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859408765] [2020-12-22 10:00:53,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:53,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:53,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691701312] [2020-12-22 10:00:53,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:53,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:53,273 INFO L87 Difference]: Start difference. First operand 13370 states and 19098 transitions. Second operand 7 states. [2020-12-22 10:00:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:54,990 INFO L93 Difference]: Finished difference Result 29254 states and 41696 transitions. [2020-12-22 10:00:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:54,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:55,044 INFO L225 Difference]: With dead ends: 29254 [2020-12-22 10:00:55,044 INFO L226 Difference]: Without dead ends: 25876 [2020-12-22 10:00:55,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25876 states. [2020-12-22 10:00:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25876 to 16746. [2020-12-22 10:00:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16746 states. [2020-12-22 10:00:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16746 states to 16746 states and 23850 transitions. [2020-12-22 10:00:56,216 INFO L78 Accepts]: Start accepts. Automaton has 16746 states and 23850 transitions. Word has length 94 [2020-12-22 10:00:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:56,216 INFO L481 AbstractCegarLoop]: Abstraction has 16746 states and 23850 transitions. [2020-12-22 10:00:56,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 16746 states and 23850 transitions. [2020-12-22 10:00:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:56,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:56,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:56,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:00:56,222 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1992477570, now seen corresponding path program 1 times [2020-12-22 10:00:56,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:56,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265598695] [2020-12-22 10:00:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:00:56,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265598695] [2020-12-22 10:00:56,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:56,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:56,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869371026] [2020-12-22 10:00:56,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:56,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:56,357 INFO L87 Difference]: Start difference. First operand 16746 states and 23850 transitions. Second operand 7 states. [2020-12-22 10:00:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:58,073 INFO L93 Difference]: Finished difference Result 32630 states and 46448 transitions. [2020-12-22 10:00:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:00:58,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:00:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:58,127 INFO L225 Difference]: With dead ends: 32630 [2020-12-22 10:00:58,127 INFO L226 Difference]: Without dead ends: 29252 [2020-12-22 10:00:58,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:00:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29252 states. [2020-12-22 10:00:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29252 to 20122. [2020-12-22 10:00:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20122 states. [2020-12-22 10:00:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20122 states to 20122 states and 28602 transitions. [2020-12-22 10:00:59,760 INFO L78 Accepts]: Start accepts. Automaton has 20122 states and 28602 transitions. Word has length 94 [2020-12-22 10:00:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:59,761 INFO L481 AbstractCegarLoop]: Abstraction has 20122 states and 28602 transitions. [2020-12-22 10:00:59,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:00:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 20122 states and 28602 transitions. [2020-12-22 10:00:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:00:59,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:59,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:59,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:00:59,766 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:59,767 INFO L82 PathProgramCache]: Analyzing trace with hash 881494174, now seen corresponding path program 1 times [2020-12-22 10:00:59,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:59,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20512601] [2020-12-22 10:00:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:00:59,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20512601] [2020-12-22 10:00:59,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:59,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 10:00:59,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294373756] [2020-12-22 10:00:59,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:00:59,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:59,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:00:59,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:00:59,897 INFO L87 Difference]: Start difference. First operand 20122 states and 28602 transitions. Second operand 7 states. [2020-12-22 10:01:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:02,044 INFO L93 Difference]: Finished difference Result 33990 states and 48384 transitions. [2020-12-22 10:01:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:01:02,045 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 10:01:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:02,096 INFO L225 Difference]: With dead ends: 33990 [2020-12-22 10:01:02,097 INFO L226 Difference]: Without dead ends: 31620 [2020-12-22 10:01:02,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:01:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31620 states. [2020-12-22 10:01:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31620 to 22490. [2020-12-22 10:01:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22490 states. [2020-12-22 10:01:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22490 states to 22490 states and 31962 transitions. [2020-12-22 10:01:03,809 INFO L78 Accepts]: Start accepts. Automaton has 22490 states and 31962 transitions. Word has length 94 [2020-12-22 10:01:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:03,810 INFO L481 AbstractCegarLoop]: Abstraction has 22490 states and 31962 transitions. [2020-12-22 10:01:03,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:01:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22490 states and 31962 transitions. [2020-12-22 10:01:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:01:03,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:03,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:03,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:01:03,818 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:03,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2121264847, now seen corresponding path program 1 times [2020-12-22 10:01:03,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:03,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804973924] [2020-12-22 10:01:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:04,097 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-22 10:01:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:04,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804973924] [2020-12-22 10:01:04,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55355332] [2020-12-22 10:01:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:01:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:01:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:01:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:01:04,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:01:04,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:01:04,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801170044] [2020-12-22 10:01:04,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:01:04,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:04,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:01:04,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:01:04,931 INFO L87 Difference]: Start difference. First operand 22490 states and 31962 transitions. Second operand 16 states. [2020-12-22 10:01:05,784 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-22 10:01:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:18,657 INFO L93 Difference]: Finished difference Result 135089 states and 188761 transitions. [2020-12-22 10:01:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 10:01:18,658 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-12-22 10:01:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:18,991 INFO L225 Difference]: With dead ends: 135089 [2020-12-22 10:01:18,991 INFO L226 Difference]: Without dead ends: 114143 [2020-12-22 10:01:19,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1223, Invalid=5419, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 10:01:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114143 states. [2020-12-22 10:01:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114143 to 71746. [2020-12-22 10:01:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71746 states. [2020-12-22 10:01:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71746 states to 71746 states and 99946 transitions. [2020-12-22 10:01:25,935 INFO L78 Accepts]: Start accepts. Automaton has 71746 states and 99946 transitions. Word has length 95 [2020-12-22 10:01:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:25,935 INFO L481 AbstractCegarLoop]: Abstraction has 71746 states and 99946 transitions. [2020-12-22 10:01:25,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:01:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 71746 states and 99946 transitions. [2020-12-22 10:01:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:01:25,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:25,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:26,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:01:26,161 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash 421270486, now seen corresponding path program 1 times [2020-12-22 10:01:26,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:26,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575060746] [2020-12-22 10:01:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:26,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575060746] [2020-12-22 10:01:26,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838387414] [2020-12-22 10:01:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:01:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:26,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:01:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:01:26,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:01:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:27,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:01:27,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-22 10:01:27,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566264395] [2020-12-22 10:01:27,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:01:27,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:01:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:01:27,179 INFO L87 Difference]: Start difference. First operand 71746 states and 99946 transitions. Second operand 21 states. [2020-12-22 10:01:27,733 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 10:01:28,524 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:28,717 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:01:29,265 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:01:38,522 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:38,709 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:01:38,946 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:39,142 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:01:39,703 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:01:39,887 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-22 10:01:40,143 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:01:40,354 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:40,542 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:01:40,931 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:41,470 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:42,480 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 10:01:43,068 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-12-22 10:01:43,986 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:01:44,206 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:01:44,482 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:01:44,725 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 10:01:44,959 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:01:45,175 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 10:01:45,440 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 10:01:46,463 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 10:01:46,666 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:01:47,378 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:01:54,166 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-22 10:03:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:10,410 INFO L93 Difference]: Finished difference Result 974253 states and 1327479 transitions. [2020-12-22 10:03:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2020-12-22 10:03:10,411 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 10:03:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:12,360 INFO L225 Difference]: With dead ends: 974253 [2020-12-22 10:03:12,361 INFO L226 Difference]: Without dead ends: 904051 [2020-12-22 10:03:12,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45792 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=10942, Invalid=93710, Unknown=0, NotChecked=0, Total=104652 [2020-12-22 10:03:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904051 states. [2020-12-22 10:03:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904051 to 346462. [2020-12-22 10:03:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346462 states. [2020-12-22 10:03:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346462 states to 346462 states and 476866 transitions. [2020-12-22 10:03:52,633 INFO L78 Accepts]: Start accepts. Automaton has 346462 states and 476866 transitions. Word has length 96 [2020-12-22 10:03:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:52,634 INFO L481 AbstractCegarLoop]: Abstraction has 346462 states and 476866 transitions. [2020-12-22 10:03:52,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:03:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 346462 states and 476866 transitions. [2020-12-22 10:03:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 10:03:52,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:52,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:52,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:03:52,874 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:52,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:52,875 INFO L82 PathProgramCache]: Analyzing trace with hash 496443166, now seen corresponding path program 1 times [2020-12-22 10:03:52,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:52,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008975701] [2020-12-22 10:03:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:52,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008975701] [2020-12-22 10:03:52,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:52,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:52,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452264879] [2020-12-22 10:03:52,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:52,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:52,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:52,972 INFO L87 Difference]: Start difference. First operand 346462 states and 476866 transitions. Second operand 3 states.