/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.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:57:21,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:57:21,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:57:21,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:57:21,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:57:21,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:57:21,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:57:21,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:57:21,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:57:21,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:57:21,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:57:21,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:57:21,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:57:21,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:57:21,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:57:21,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:57:21,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:57:21,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:57:21,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:57:21,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:57:21,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:57:21,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:57:21,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:57:21,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:57:21,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:57:21,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:57:21,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:57:21,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:57:21,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:57:21,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:57:21,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:57:21,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:57:21,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:57:21,165 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:57:21,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:57:21,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:57:21,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:57:21,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:57:21,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:57:21,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:57:21,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:57:21,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:57:21,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:57:21,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:57:21,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:57:21,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:57:21,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:57:21,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:57:21,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:57:21,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:57:21,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:57:21,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:57:21,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:57:21,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:57:21,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:57:21,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:57:21,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:57:21,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:57:21,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:57:21,604 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:57:21,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:57:21,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b179b955a/83894bcd33e644b6987f3f91c6aad698/FLAGbacc5ad3e [2020-12-22 09:57:22,758 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:57:22,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:57:22,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b179b955a/83894bcd33e644b6987f3f91c6aad698/FLAGbacc5ad3e [2020-12-22 09:57:23,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b179b955a/83894bcd33e644b6987f3f91c6aad698 [2020-12-22 09:57:23,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:57:23,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:57:23,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:57:23,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:57:23,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:57:23,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:57:23" (1/1) ... [2020-12-22 09:57:23,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577643b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:23, skipping insertion in model container [2020-12-22 09:57:23,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:57:23" (1/1) ... [2020-12-22 09:57:23,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:57:23,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:57:23,864 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.ufo.UNBOUNDED.pals+Problem12_label05.c[11758,11771] [2020-12-22 09:57:23,929 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.ufo.UNBOUNDED.pals+Problem12_label05.c[18451,18464] [2020-12-22 09:57:25,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:57:25,028 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:57:25,113 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.ufo.UNBOUNDED.pals+Problem12_label05.c[11758,11771] [2020-12-22 09:57:25,131 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.ufo.UNBOUNDED.pals+Problem12_label05.c[18451,18464] [2020-12-22 09:57:25,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:57:25,781 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:57:25,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25 WrapperNode [2020-12-22 09:57:25,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:57:25,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:57:25,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:57:25,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:57:25,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:25,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:26,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:57:26,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:57:26,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:57:26,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:57:26,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:26,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:26,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:26,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:26,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:26,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:26,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (1/1) ... [2020-12-22 09:57:27,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:57:27,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:57:27,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:57:27,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:57:27,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (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 09:57:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:57:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:57:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:57:27,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:57:32,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:57:32,379 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:57:32,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:57:32 BoogieIcfgContainer [2020-12-22 09:57:32,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:57:32,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:57:32,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:57:32,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:57:32,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:57:23" (1/3) ... [2020-12-22 09:57:32,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e4e0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:57:32, skipping insertion in model container [2020-12-22 09:57:32,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:25" (2/3) ... [2020-12-22 09:57:32,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e4e0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:57:32, skipping insertion in model container [2020-12-22 09:57:32,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:57:32" (3/3) ... [2020-12-22 09:57:32,396 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:57:32,403 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:57:32,409 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:57:32,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:57:32,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:57:32,465 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:57:32,465 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:57:32,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:57:32,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:57:32,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:57:32,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:57:32,466 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:57:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:57:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:57:32,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:32,511 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 09:57:32,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:57:32,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:32,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722233787] [2020-12-22 09:57:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:32,764 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 09:57:32,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722233787] [2020-12-22 09:57:32,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:32,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:57:32,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496060576] [2020-12-22 09:57:32,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:57:32,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:57:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:57:32,791 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:57:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:32,875 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:57:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:57:32,877 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:57:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:32,914 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:57:32,915 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:57:32,928 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 09:57:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:57:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:57:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:57:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:57:33,061 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:57:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:33,061 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:57:33,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:57:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:57:33,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:57:33,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:33,064 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 09:57:33,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:57:33,064 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:57:33,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:33,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714929139] [2020-12-22 09:57:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:33,257 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 09:57:33,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714929139] [2020-12-22 09:57:33,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:33,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:33,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747213795] [2020-12-22 09:57:33,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:33,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:33,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:33,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:33,263 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:57:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:33,393 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:57:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:57:33,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:57:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:33,399 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:57:33,400 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:57:33,401 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 09:57:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:57:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:57:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:57:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:57:33,425 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:57:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:33,425 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:57:33,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:57:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:57:33,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:33,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:33,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:57:33,438 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash -445282779, now seen corresponding path program 1 times [2020-12-22 09:57:33,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:33,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707523543] [2020-12-22 09:57:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:33,701 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 09:57:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707523543] [2020-12-22 09:57:33,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:33,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:33,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893315995] [2020-12-22 09:57:33,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:57:33,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:57:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:57:33,711 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 4 states. [2020-12-22 09:57:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:44,783 INFO L93 Difference]: Finished difference Result 3099 states and 5869 transitions. [2020-12-22 09:57:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:57:44,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 09:57:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:44,807 INFO L225 Difference]: With dead ends: 3099 [2020-12-22 09:57:44,808 INFO L226 Difference]: Without dead ends: 2346 [2020-12-22 09:57:44,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2020-12-22 09:57:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2346. [2020-12-22 09:57:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-12-22 09:57:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3536 transitions. [2020-12-22 09:57:44,922 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3536 transitions. Word has length 60 [2020-12-22 09:57:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:44,924 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3536 transitions. [2020-12-22 09:57:44,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:57:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3536 transitions. [2020-12-22 09:57:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:44,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:44,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:44,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:57:44,928 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:57:44,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:44,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169760414] [2020-12-22 09:57:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:45,021 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 09:57:45,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169760414] [2020-12-22 09:57:45,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:45,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823960474] [2020-12-22 09:57:45,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:45,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:45,026 INFO L87 Difference]: Start difference. First operand 2346 states and 3536 transitions. Second operand 3 states. [2020-12-22 09:57:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:45,075 INFO L93 Difference]: Finished difference Result 2446 states and 3694 transitions. [2020-12-22 09:57:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:45,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:57:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:45,091 INFO L225 Difference]: With dead ends: 2446 [2020-12-22 09:57:45,091 INFO L226 Difference]: Without dead ends: 2393 [2020-12-22 09:57:45,093 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 09:57:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2020-12-22 09:57:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2020-12-22 09:57:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2391 states. [2020-12-22 09:57:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3608 transitions. [2020-12-22 09:57:45,157 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3608 transitions. Word has length 64 [2020-12-22 09:57:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:45,157 INFO L481 AbstractCegarLoop]: Abstraction has 2391 states and 3608 transitions. [2020-12-22 09:57:45,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3608 transitions. [2020-12-22 09:57:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:45,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:45,160 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 09:57:45,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:57:45,160 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:57:45,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:45,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878885251] [2020-12-22 09:57:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:45,353 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 09:57:45,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878885251] [2020-12-22 09:57:45,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:45,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:45,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921093153] [2020-12-22 09:57:45,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:45,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:45,356 INFO L87 Difference]: Start difference. First operand 2391 states and 3608 transitions. Second operand 7 states. [2020-12-22 09:57:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:45,664 INFO L93 Difference]: Finished difference Result 3371 states and 5168 transitions. [2020-12-22 09:57:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:57:45,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:57:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:45,683 INFO L225 Difference]: With dead ends: 3371 [2020-12-22 09:57:45,684 INFO L226 Difference]: Without dead ends: 3273 [2020-12-22 09:57:45,685 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 09:57:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-12-22 09:57:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2487. [2020-12-22 09:57:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2487 states. [2020-12-22 09:57:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3759 transitions. [2020-12-22 09:57:45,766 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3759 transitions. Word has length 64 [2020-12-22 09:57:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:45,767 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 3759 transitions. [2020-12-22 09:57:45,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3759 transitions. [2020-12-22 09:57:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:45,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:45,768 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 09:57:45,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:57:45,769 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:57:45,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:45,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118940133] [2020-12-22 09:57:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:45,837 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 09:57:45,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118940133] [2020-12-22 09:57:45,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:45,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:45,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59119543] [2020-12-22 09:57:45,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:45,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:45,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:45,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:45,840 INFO L87 Difference]: Start difference. First operand 2487 states and 3759 transitions. Second operand 3 states. [2020-12-22 09:57:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:45,908 INFO L93 Difference]: Finished difference Result 2853 states and 4335 transitions. [2020-12-22 09:57:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:45,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:45,923 INFO L225 Difference]: With dead ends: 2853 [2020-12-22 09:57:45,923 INFO L226 Difference]: Without dead ends: 2659 [2020-12-22 09:57:45,925 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 09:57:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2020-12-22 09:57:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2653. [2020-12-22 09:57:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:57:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4013 transitions. [2020-12-22 09:57:46,005 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4013 transitions. Word has length 66 [2020-12-22 09:57:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:46,005 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4013 transitions. [2020-12-22 09:57:46,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4013 transitions. [2020-12-22 09:57:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:46,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:46,007 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] [2020-12-22 09:57:46,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:57:46,007 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:57:46,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:46,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939704998] [2020-12-22 09:57:46,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:46,199 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 09:57:46,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939704998] [2020-12-22 09:57:46,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:46,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:46,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072526966] [2020-12-22 09:57:46,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:46,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:46,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:46,202 INFO L87 Difference]: Start difference. First operand 2653 states and 4013 transitions. Second operand 7 states. [2020-12-22 09:57:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:46,488 INFO L93 Difference]: Finished difference Result 3015 states and 4575 transitions. [2020-12-22 09:57:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:46,489 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:57:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:46,501 INFO L225 Difference]: With dead ends: 3015 [2020-12-22 09:57:46,502 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 09:57:46,503 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 09:57:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 09:57:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2653. [2020-12-22 09:57:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2653 states. [2020-12-22 09:57:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 4009 transitions. [2020-12-22 09:57:46,590 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 4009 transitions. Word has length 66 [2020-12-22 09:57:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:46,592 INFO L481 AbstractCegarLoop]: Abstraction has 2653 states and 4009 transitions. [2020-12-22 09:57:46,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 4009 transitions. [2020-12-22 09:57:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:46,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:46,593 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 09:57:46,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:57:46,594 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:46,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:57:46,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:46,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345758533] [2020-12-22 09:57:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:46,679 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 09:57:46,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345758533] [2020-12-22 09:57:46,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:46,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:46,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244156648] [2020-12-22 09:57:46,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:46,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:46,682 INFO L87 Difference]: Start difference. First operand 2653 states and 4009 transitions. Second operand 3 states. [2020-12-22 09:57:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:46,762 INFO L93 Difference]: Finished difference Result 3325 states and 5043 transitions. [2020-12-22 09:57:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:46,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:46,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:46,778 INFO L225 Difference]: With dead ends: 3325 [2020-12-22 09:57:46,778 INFO L226 Difference]: Without dead ends: 2965 [2020-12-22 09:57:46,780 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 09:57:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-12-22 09:57:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-12-22 09:57:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-12-22 09:57:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4477 transitions. [2020-12-22 09:57:46,892 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4477 transitions. Word has length 66 [2020-12-22 09:57:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:46,893 INFO L481 AbstractCegarLoop]: Abstraction has 2963 states and 4477 transitions. [2020-12-22 09:57:46,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4477 transitions. [2020-12-22 09:57:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:46,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:46,894 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 09:57:46,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:57:46,895 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:57:46,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:46,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151221597] [2020-12-22 09:57:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:47,011 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 09:57:47,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151221597] [2020-12-22 09:57:47,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:47,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:47,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490328845] [2020-12-22 09:57:47,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:47,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:47,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:47,014 INFO L87 Difference]: Start difference. First operand 2963 states and 4477 transitions. Second operand 3 states. [2020-12-22 09:57:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:47,148 INFO L93 Difference]: Finished difference Result 4207 states and 6367 transitions. [2020-12-22 09:57:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:47,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:47,167 INFO L225 Difference]: With dead ends: 4207 [2020-12-22 09:57:47,168 INFO L226 Difference]: Without dead ends: 3537 [2020-12-22 09:57:47,170 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 09:57:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-12-22 09:57:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3535. [2020-12-22 09:57:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3535 states. [2020-12-22 09:57:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5325 transitions. [2020-12-22 09:57:47,322 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5325 transitions. Word has length 66 [2020-12-22 09:57:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:47,322 INFO L481 AbstractCegarLoop]: Abstraction has 3535 states and 5325 transitions. [2020-12-22 09:57:47,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5325 transitions. [2020-12-22 09:57:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:47,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:47,330 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 09:57:47,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:57:47,331 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:57:47,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:47,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307593171] [2020-12-22 09:57:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:47,397 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 09:57:47,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307593171] [2020-12-22 09:57:47,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:47,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:47,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601114043] [2020-12-22 09:57:47,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:47,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:47,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:47,403 INFO L87 Difference]: Start difference. First operand 3535 states and 5325 transitions. Second operand 3 states. [2020-12-22 09:57:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:47,594 INFO L93 Difference]: Finished difference Result 5827 states and 8751 transitions. [2020-12-22 09:57:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:47,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:47,637 INFO L225 Difference]: With dead ends: 5827 [2020-12-22 09:57:47,637 INFO L226 Difference]: Without dead ends: 4585 [2020-12-22 09:57:47,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2020-12-22 09:57:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4583. [2020-12-22 09:57:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4583 states. [2020-12-22 09:57:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6845 transitions. [2020-12-22 09:57:47,890 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6845 transitions. Word has length 66 [2020-12-22 09:57:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:47,891 INFO L481 AbstractCegarLoop]: Abstraction has 4583 states and 6845 transitions. [2020-12-22 09:57:47,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6845 transitions. [2020-12-22 09:57:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:57:47,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:47,892 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 09:57:47,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:57:47,893 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:57:47,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:47,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199825216] [2020-12-22 09:57:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:48,001 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 09:57:48,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199825216] [2020-12-22 09:57:48,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:48,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:48,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220060961] [2020-12-22 09:57:48,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:48,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:48,005 INFO L87 Difference]: Start difference. First operand 4583 states and 6845 transitions. Second operand 5 states. [2020-12-22 09:57:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:48,412 INFO L93 Difference]: Finished difference Result 6309 states and 9347 transitions. [2020-12-22 09:57:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:48,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:57:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:48,428 INFO L225 Difference]: With dead ends: 6309 [2020-12-22 09:57:48,429 INFO L226 Difference]: Without dead ends: 6307 [2020-12-22 09:57:48,432 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 09:57:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2020-12-22 09:57:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 4679. [2020-12-22 09:57:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-12-22 09:57:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 6925 transitions. [2020-12-22 09:57:48,721 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 6925 transitions. Word has length 67 [2020-12-22 09:57:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:48,722 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 6925 transitions. [2020-12-22 09:57:48,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 6925 transitions. [2020-12-22 09:57:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:57:48,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:48,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:48,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:57:48,723 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:57:48,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:48,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988475407] [2020-12-22 09:57:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:48,780 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 09:57:48,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988475407] [2020-12-22 09:57:48,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:48,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:48,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989556538] [2020-12-22 09:57:48,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:48,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:48,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:48,783 INFO L87 Difference]: Start difference. First operand 4679 states and 6925 transitions. Second operand 3 states. [2020-12-22 09:57:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:49,160 INFO L93 Difference]: Finished difference Result 7118 states and 10515 transitions. [2020-12-22 09:57:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:49,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:57:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:49,175 INFO L225 Difference]: With dead ends: 7118 [2020-12-22 09:57:49,175 INFO L226 Difference]: Without dead ends: 5771 [2020-12-22 09:57:49,180 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 09:57:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-12-22 09:57:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2020-12-22 09:57:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:57:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8479 transitions. [2020-12-22 09:57:49,589 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8479 transitions. Word has length 68 [2020-12-22 09:57:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:49,590 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8479 transitions. [2020-12-22 09:57:49,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8479 transitions. [2020-12-22 09:57:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:49,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:49,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:49,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:57:49,595 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:49,596 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:57:49,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:49,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131452267] [2020-12-22 09:57:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:57:49,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131452267] [2020-12-22 09:57:49,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:49,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:49,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096689354] [2020-12-22 09:57:49,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:49,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:49,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:49,746 INFO L87 Difference]: Start difference. First operand 5769 states and 8479 transitions. Second operand 7 states. [2020-12-22 09:57:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:51,095 INFO L93 Difference]: Finished difference Result 23845 states and 34581 transitions. [2020-12-22 09:57:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:51,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:51,139 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:57:51,139 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:57:51,151 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 09:57:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:57:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:57:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:57:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13455 transitions. [2020-12-22 09:57:51,830 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13455 transitions. Word has length 94 [2020-12-22 09:57:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:51,830 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13455 transitions. [2020-12-22 09:57:51,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13455 transitions. [2020-12-22 09:57:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:51,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:51,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:51,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:57:51,835 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:57:51,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:51,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841093399] [2020-12-22 09:57:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:57:51,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841093399] [2020-12-22 09:57:51,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:51,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:51,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599133616] [2020-12-22 09:57:51,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:51,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:51,974 INFO L87 Difference]: Start difference. First operand 9241 states and 13455 transitions. Second operand 7 states. [2020-12-22 09:57:53,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:53,580 INFO L93 Difference]: Finished difference Result 27317 states and 39557 transitions. [2020-12-22 09:57:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:53,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:53,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:53,631 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:57:53,631 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:57:53,645 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 09:57:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:57:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:57:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:57:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 20879 transitions. [2020-12-22 09:57:54,687 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 20879 transitions. Word has length 94 [2020-12-22 09:57:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:54,687 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 20879 transitions. [2020-12-22 09:57:54,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 20879 transitions. [2020-12-22 09:57:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:54,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:54,692 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:54,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:57:54,692 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:54,693 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:57:54,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:54,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054100966] [2020-12-22 09:57:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:57:54,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054100966] [2020-12-22 09:57:54,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:54,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:54,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709825976] [2020-12-22 09:57:54,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:54,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:54,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:54,819 INFO L87 Difference]: Start difference. First operand 14457 states and 20879 transitions. Second operand 7 states. [2020-12-22 09:57:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:56,907 INFO L93 Difference]: Finished difference Result 30789 states and 44533 transitions. [2020-12-22 09:57:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:56,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:56,966 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:57:56,966 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:57:56,981 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 09:57:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:57:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:57:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:57:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25855 transitions. [2020-12-22 09:57:58,090 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25855 transitions. Word has length 94 [2020-12-22 09:57:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:58,091 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25855 transitions. [2020-12-22 09:57:58,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25855 transitions. [2020-12-22 09:57:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:57:58,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:58,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:58,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:57:58,096 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:57:58,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:58,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761523599] [2020-12-22 09:57:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:57:58,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761523599] [2020-12-22 09:57:58,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:58,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:58,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826259721] [2020-12-22 09:57:58,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:58,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:58,218 INFO L87 Difference]: Start difference. First operand 17929 states and 25855 transitions. Second operand 7 states. [2020-12-22 09:57:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:59,717 INFO L93 Difference]: Finished difference Result 34261 states and 49509 transitions. [2020-12-22 09:57:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:59,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:57:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:59,777 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:57:59,778 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:57:59,794 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 09:57:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:58:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:58:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:58:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30831 transitions. [2020-12-22 09:58:01,071 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30831 transitions. Word has length 94 [2020-12-22 09:58:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:01,071 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30831 transitions. [2020-12-22 09:58:01,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30831 transitions. [2020-12-22 09:58:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:58:01,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:01,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:01,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:58:01,079 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:58:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:01,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976622213] [2020-12-22 09:58:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:01,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976622213] [2020-12-22 09:58:01,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:01,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:01,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613846286] [2020-12-22 09:58:01,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:01,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:01,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:01,153 INFO L87 Difference]: Start difference. First operand 21401 states and 30831 transitions. Second operand 3 states. [2020-12-22 09:58:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:02,469 INFO L93 Difference]: Finished difference Result 34810 states and 50228 transitions. [2020-12-22 09:58:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:02,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:58:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:02,504 INFO L225 Difference]: With dead ends: 34810 [2020-12-22 09:58:02,504 INFO L226 Difference]: Without dead ends: 15704 [2020-12-22 09:58:02,530 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 09:58:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2020-12-22 09:58:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2020-12-22 09:58:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15702 states. [2020-12-22 09:58:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22673 transitions. [2020-12-22 09:58:03,462 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22673 transitions. Word has length 96 [2020-12-22 09:58:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:03,463 INFO L481 AbstractCegarLoop]: Abstraction has 15702 states and 22673 transitions. [2020-12-22 09:58:03,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22673 transitions. [2020-12-22 09:58:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:58:03,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:03,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:03,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:58:03,468 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:58:03,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:03,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423652367] [2020-12-22 09:58:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:58:03,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423652367] [2020-12-22 09:58:03,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:03,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:03,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342270731] [2020-12-22 09:58:03,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:03,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:03,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:03,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:03,580 INFO L87 Difference]: Start difference. First operand 15702 states and 22673 transitions. Second operand 7 states. [2020-12-22 09:58:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:04,902 INFO L93 Difference]: Finished difference Result 27874 states and 40279 transitions. [2020-12-22 09:58:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:04,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:58:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:04,940 INFO L225 Difference]: With dead ends: 27874 [2020-12-22 09:58:04,940 INFO L226 Difference]: Without dead ends: 25440 [2020-12-22 09:58:04,953 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 09:58:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2020-12-22 09:58:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2020-12-22 09:58:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18134 states. [2020-12-22 09:58:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26161 transitions. [2020-12-22 09:58:06,101 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26161 transitions. Word has length 96 [2020-12-22 09:58:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:06,101 INFO L481 AbstractCegarLoop]: Abstraction has 18134 states and 26161 transitions. [2020-12-22 09:58:06,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26161 transitions. [2020-12-22 09:58:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:06,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:06,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:06,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:58:06,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:58:06,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:06,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279445396] [2020-12-22 09:58:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:06,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279445396] [2020-12-22 09:58:06,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:06,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:06,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430124581] [2020-12-22 09:58:06,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:06,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:06,171 INFO L87 Difference]: Start difference. First operand 18134 states and 26161 transitions. Second operand 3 states. [2020-12-22 09:58:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:06,683 INFO L93 Difference]: Finished difference Result 26042 states and 37499 transitions. [2020-12-22 09:58:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:06,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:58:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:06,696 INFO L225 Difference]: With dead ends: 26042 [2020-12-22 09:58:06,697 INFO L226 Difference]: Without dead ends: 10232 [2020-12-22 09:58:06,715 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 09:58:06,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-12-22 09:58:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2020-12-22 09:58:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10230 states. [2020-12-22 09:58:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14721 transitions. [2020-12-22 09:58:07,355 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14721 transitions. Word has length 97 [2020-12-22 09:58:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:07,356 INFO L481 AbstractCegarLoop]: Abstraction has 10230 states and 14721 transitions. [2020-12-22 09:58:07,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14721 transitions. [2020-12-22 09:58:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:07,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:07,359 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:07,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:58:07,360 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:58:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:07,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097465459] [2020-12-22 09:58:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097465459] [2020-12-22 09:58:07,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:07,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:07,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860718845] [2020-12-22 09:58:07,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:07,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:07,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:07,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:07,418 INFO L87 Difference]: Start difference. First operand 10230 states and 14721 transitions. Second operand 3 states. [2020-12-22 09:58:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:07,841 INFO L93 Difference]: Finished difference Result 14186 states and 20339 transitions. [2020-12-22 09:58:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:07,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:58:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:07,853 INFO L225 Difference]: With dead ends: 14186 [2020-12-22 09:58:07,853 INFO L226 Difference]: Without dead ends: 6280 [2020-12-22 09:58:07,863 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 09:58:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-12-22 09:58:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-12-22 09:58:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:58:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9053 transitions. [2020-12-22 09:58:08,249 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9053 transitions. Word has length 97 [2020-12-22 09:58:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:08,249 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 9053 transitions. [2020-12-22 09:58:08,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9053 transitions. [2020-12-22 09:58:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:08,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:08,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:08,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:58:08,253 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:08,254 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:58:08,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:08,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041375423] [2020-12-22 09:58:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:08,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041375423] [2020-12-22 09:58:08,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:08,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:08,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320762282] [2020-12-22 09:58:08,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:08,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:08,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:08,315 INFO L87 Difference]: Start difference. First operand 6278 states and 9053 transitions. Second operand 3 states. [2020-12-22 09:58:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:08,497 INFO L93 Difference]: Finished difference Result 8258 states and 11837 transitions. [2020-12-22 09:58:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:08,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:58:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:08,502 INFO L225 Difference]: With dead ends: 8258 [2020-12-22 09:58:08,502 INFO L226 Difference]: Without dead ends: 4304 [2020-12-22 09:58:08,505 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 09:58:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-12-22 09:58:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2020-12-22 09:58:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 09:58:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6245 transitions. [2020-12-22 09:58:08,645 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6245 transitions. Word has length 97 [2020-12-22 09:58:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:08,645 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6245 transitions. [2020-12-22 09:58:08,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6245 transitions. [2020-12-22 09:58:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:08,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:08,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:08,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:58:08,648 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:58:08,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:08,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878673330] [2020-12-22 09:58:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:08,990 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 09:58:08,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878673330] [2020-12-22 09:58:08,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391058408] [2020-12-22 09:58:08,991 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 09:58:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:09,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:58:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:58:09,702 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 09:58:09,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:58:09,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:58:09,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658342183] [2020-12-22 09:58:09,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:58:09,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:09,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:58:09,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:58:09,707 INFO L87 Difference]: Start difference. First operand 4302 states and 6245 transitions. Second operand 16 states. [2020-12-22 09:58:11,724 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:58:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:13,835 INFO L93 Difference]: Finished difference Result 15373 states and 21264 transitions. [2020-12-22 09:58:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:58:13,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:58:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:13,890 INFO L225 Difference]: With dead ends: 15373 [2020-12-22 09:58:13,890 INFO L226 Difference]: Without dead ends: 13395 [2020-12-22 09:58:13,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:58:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2020-12-22 09:58:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10024. [2020-12-22 09:58:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2020-12-22 09:58:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 13807 transitions. [2020-12-22 09:58:15,249 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 13807 transitions. Word has length 97 [2020-12-22 09:58:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:15,249 INFO L481 AbstractCegarLoop]: Abstraction has 10024 states and 13807 transitions. [2020-12-22 09:58:15,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:58:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 13807 transitions. [2020-12-22 09:58:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:15,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:15,254 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, 1, 1, 1, 1] [2020-12-22 09:58:15,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:58:15,470 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:58:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:15,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217876186] [2020-12-22 09:58:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:15,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217876186] [2020-12-22 09:58:15,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038287474] [2020-12-22 09:58:15,897 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 09:58:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:16,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:58:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:58:16,325 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:58:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:16,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:58:16,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:58:16,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980068401] [2020-12-22 09:58:16,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:58:16,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:58:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:58:16,730 INFO L87 Difference]: Start difference. First operand 10024 states and 13807 transitions. Second operand 22 states. [2020-12-22 09:58:19,053 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:58:21,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:21,838 INFO L93 Difference]: Finished difference Result 40825 states and 54873 transitions. [2020-12-22 09:58:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:58:21,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:58:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:21,939 INFO L225 Difference]: With dead ends: 40825 [2020-12-22 09:58:21,939 INFO L226 Difference]: Without dead ends: 34322 [2020-12-22 09:58:21,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:58:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2020-12-22 09:58:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 22527. [2020-12-22 09:58:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22527 states. [2020-12-22 09:58:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22527 states to 22527 states and 30346 transitions. [2020-12-22 09:58:24,029 INFO L78 Accepts]: Start accepts. Automaton has 22527 states and 30346 transitions. Word has length 98 [2020-12-22 09:58:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:24,030 INFO L481 AbstractCegarLoop]: Abstraction has 22527 states and 30346 transitions. [2020-12-22 09:58:24,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:58:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 22527 states and 30346 transitions. [2020-12-22 09:58:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:24,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:24,033 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, 1, 1, 1, 1] [2020-12-22 09:58:24,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:58:24,247 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:24,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:58:24,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:24,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406279500] [2020-12-22 09:58:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406279500] [2020-12-22 09:58:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421427024] [2020-12-22 09:58:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:58:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:58:24,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:58:24,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:58:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:25,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:58:25,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:58:25,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463602398] [2020-12-22 09:58:25,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:58:25,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:25,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:58:25,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:58:25,163 INFO L87 Difference]: Start difference. First operand 22527 states and 30346 transitions. Second operand 17 states. [2020-12-22 09:58:27,890 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:58:29,014 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:58:33,416 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:58:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:51,159 INFO L93 Difference]: Finished difference Result 217082 states and 288156 transitions. [2020-12-22 09:58:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:58:51,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:58:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:51,553 INFO L225 Difference]: With dead ends: 217082 [2020-12-22 09:58:51,554 INFO L226 Difference]: Without dead ends: 197525 [2020-12-22 09:58:51,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:58:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197525 states. [2020-12-22 09:59:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197525 to 112800. [2020-12-22 09:59:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112800 states. [2020-12-22 09:59:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112800 states to 112800 states and 147729 transitions. [2020-12-22 09:59:04,675 INFO L78 Accepts]: Start accepts. Automaton has 112800 states and 147729 transitions. Word has length 98 [2020-12-22 09:59:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:04,675 INFO L481 AbstractCegarLoop]: Abstraction has 112800 states and 147729 transitions. [2020-12-22 09:59:04,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:59:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 112800 states and 147729 transitions. [2020-12-22 09:59:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:04,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:04,681 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, 1, 1, 1, 1] [2020-12-22 09:59:04,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:59:04,896 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:59:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:04,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215783554] [2020-12-22 09:59:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:59:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215783554] [2020-12-22 09:59:05,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:05,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:05,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953982705] [2020-12-22 09:59:05,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:05,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:05,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:05,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:05,028 INFO L87 Difference]: Start difference. First operand 112800 states and 147729 transitions. Second operand 6 states. [2020-12-22 09:59:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:16,116 INFO L93 Difference]: Finished difference Result 213245 states and 279510 transitions. [2020-12-22 09:59:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:16,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:16,306 INFO L225 Difference]: With dead ends: 213245 [2020-12-22 09:59:16,306 INFO L226 Difference]: Without dead ends: 102941 [2020-12-22 09:59:16,387 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 09:59:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102941 states. [2020-12-22 09:59:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102941 to 102941. [2020-12-22 09:59:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102941 states. [2020-12-22 09:59:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102941 states to 102941 states and 133968 transitions. [2020-12-22 09:59:27,442 INFO L78 Accepts]: Start accepts. Automaton has 102941 states and 133968 transitions. Word has length 98 [2020-12-22 09:59:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:27,443 INFO L481 AbstractCegarLoop]: Abstraction has 102941 states and 133968 transitions. [2020-12-22 09:59:27,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 102941 states and 133968 transitions. [2020-12-22 09:59:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:27,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:27,453 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, 1, 1, 1, 1] [2020-12-22 09:59:27,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:59:27,453 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:59:27,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:27,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700261972] [2020-12-22 09:59:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:59:27,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700261972] [2020-12-22 09:59:27,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:27,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:27,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765559239] [2020-12-22 09:59:27,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:27,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:27,580 INFO L87 Difference]: Start difference. First operand 102941 states and 133968 transitions. Second operand 6 states. [2020-12-22 09:59:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:36,135 INFO L93 Difference]: Finished difference Result 176479 states and 229419 transitions. [2020-12-22 09:59:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:36,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:36,234 INFO L225 Difference]: With dead ends: 176479 [2020-12-22 09:59:36,235 INFO L226 Difference]: Without dead ends: 76200 [2020-12-22 09:59:36,304 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 09:59:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76200 states. [2020-12-22 09:59:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76200 to 76200. [2020-12-22 09:59:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76200 states. [2020-12-22 09:59:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76200 states to 76200 states and 97896 transitions. [2020-12-22 09:59:44,634 INFO L78 Accepts]: Start accepts. Automaton has 76200 states and 97896 transitions. Word has length 98 [2020-12-22 09:59:44,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:44,634 INFO L481 AbstractCegarLoop]: Abstraction has 76200 states and 97896 transitions. [2020-12-22 09:59:44,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 76200 states and 97896 transitions. [2020-12-22 09:59:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:44,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:44,637 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, 1, 1, 1, 1] [2020-12-22 09:59:44,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:59:44,637 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:59:44,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:44,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565361253] [2020-12-22 09:59:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:59:44,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565361253] [2020-12-22 09:59:44,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:44,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:44,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117054672] [2020-12-22 09:59:44,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:44,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:44,725 INFO L87 Difference]: Start difference. First operand 76200 states and 97896 transitions. Second operand 6 states. [2020-12-22 09:59:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:51,522 INFO L93 Difference]: Finished difference Result 131990 states and 169560 transitions. [2020-12-22 09:59:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:51,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:51,598 INFO L225 Difference]: With dead ends: 131990 [2020-12-22 09:59:51,598 INFO L226 Difference]: Without dead ends: 58170 [2020-12-22 09:59:51,636 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 09:59:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58170 states. [2020-12-22 09:59:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58170 to 58170. [2020-12-22 09:59:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58170 states. [2020-12-22 09:59:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58170 states to 58170 states and 74590 transitions. [2020-12-22 09:59:58,286 INFO L78 Accepts]: Start accepts. Automaton has 58170 states and 74590 transitions. Word has length 98 [2020-12-22 09:59:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:58,286 INFO L481 AbstractCegarLoop]: Abstraction has 58170 states and 74590 transitions. [2020-12-22 09:59:58,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 58170 states and 74590 transitions. [2020-12-22 09:59:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:59:58,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:58,291 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, 1, 1, 1, 1, 1] [2020-12-22 09:59:58,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:59:58,291 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:59:58,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:58,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096340140] [2020-12-22 09:59:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:59:58,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096340140] [2020-12-22 09:59:58,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:58,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:58,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400508595] [2020-12-22 09:59:58,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:58,397 INFO L87 Difference]: Start difference. First operand 58170 states and 74590 transitions. Second operand 6 states. [2020-12-22 10:00:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:04,403 INFO L93 Difference]: Finished difference Result 101224 states and 129493 transitions. [2020-12-22 10:00:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:04,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 10:00:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:04,461 INFO L225 Difference]: With dead ends: 101224 [2020-12-22 10:00:04,462 INFO L226 Difference]: Without dead ends: 45436 [2020-12-22 10:00:04,503 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 10:00:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45436 states. [2020-12-22 10:00:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45436 to 45436. [2020-12-22 10:00:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45436 states. [2020-12-22 10:00:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45436 states to 45436 states and 57833 transitions. [2020-12-22 10:00:09,879 INFO L78 Accepts]: Start accepts. Automaton has 45436 states and 57833 transitions. Word has length 99 [2020-12-22 10:00:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:09,879 INFO L481 AbstractCegarLoop]: Abstraction has 45436 states and 57833 transitions. [2020-12-22 10:00:09,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 45436 states and 57833 transitions. [2020-12-22 10:00:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 10:00:09,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:09,882 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, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:09,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:00:09,883 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 10:00:09,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:09,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714698250] [2020-12-22 10:00:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:10,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714698250] [2020-12-22 10:00:10,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132570756] [2020-12-22 10:00:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:00:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:10,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:00:10,913 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 10:00:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:11,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:11,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 10:00:11,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931609349] [2020-12-22 10:00:11,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:00:11,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:00:11,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:00:11,573 INFO L87 Difference]: Start difference. First operand 45436 states and 57833 transitions. Second operand 20 states. [2020-12-22 10:00:12,480 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 10:00:13,060 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 10:00:13,820 WARN L197 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 10:00:14,617 WARN L197 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 10:00:15,251 WARN L197 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:15,998 WARN L197 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:16,727 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:00:17,222 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 10:00:17,882 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:00:18,519 WARN L197 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 10:00:19,415 WARN L197 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:00:20,093 WARN L197 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:00:20,971 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:00:21,706 WARN L197 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:00:22,363 WARN L197 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:00:23,414 WARN L197 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:26,921 WARN L197 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:27,824 WARN L197 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 10:00:28,586 WARN L197 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:29,220 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:30,089 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:00:30,521 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:31,025 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:31,462 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:32,068 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 10:00:32,448 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:33,297 WARN L197 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 10:00:34,052 WARN L197 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:34,566 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 10:00:35,000 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:36,158 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:36,605 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:37,542 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:37,989 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:38,420 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:42,102 WARN L197 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:00:43,576 WARN L197 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:00:44,606 WARN L197 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:45,097 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:45,592 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:46,374 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:00:46,879 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:47,632 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:47,993 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:00:48,569 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:00:48,868 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:00:59,239 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:00:59,514 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 10:01:00,422 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:01:00,711 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 10:01:02,944 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:01:03,667 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 71