/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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:18:18,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:18:18,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:18:18,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:18:18,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:18:18,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:18:18,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:18:18,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:18:18,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:18:18,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:18:18,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:18:18,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:18:18,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:18:18,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:18:18,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:18:18,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:18:18,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:18:18,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:18:18,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:18:18,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:18:18,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:18:18,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:18:18,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:18:18,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:18:18,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:18:18,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:18:18,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:18:18,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:18:18,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:18:18,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:18:18,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:18:18,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:18:18,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:18:18,795 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:18:18,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:18:18,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:18:18,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:18:18,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:18:18,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:18:18,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:18:18,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:18:18,798 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:18:18,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:18:18,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:18:18,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:18:18,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:18:18,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:18:18,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:18:18,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:18:18,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:18:18,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:18:18,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:18:18,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:18:18,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:18:18,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:18:19,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:18:19,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:18:19,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:18:19,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:18:19,228 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:18:19,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:18:19,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbf9f8d1/8a7c042850104942914472f95f8575da/FLAG49be19502 [2020-12-22 10:18:20,352 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:18:20,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:18:20,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbf9f8d1/8a7c042850104942914472f95f8575da/FLAG49be19502 [2020-12-22 10:18:20,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbf9f8d1/8a7c042850104942914472f95f8575da [2020-12-22 10:18:20,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:18:20,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:18:20,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:18:20,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:18:20,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:18:20,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:18:20" (1/1) ... [2020-12-22 10:18:20,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dcc6a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:20, skipping insertion in model container [2020-12-22 10:18:20,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:18:20" (1/1) ... [2020-12-22 10:18:20,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:18:20,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:18:21,360 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[20646,20659] [2020-12-22 10:18:21,478 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[28151,28164] [2020-12-22 10:18:22,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:18:22,410 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:18:22,498 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[20646,20659] [2020-12-22 10:18:22,514 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.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[28151,28164] [2020-12-22 10:18:23,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:18:23,267 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:18:23,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23 WrapperNode [2020-12-22 10:18:23,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:18:23,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:18:23,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:18:23,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:18:23,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:23,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:23,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:18:23,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:18:23,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:18:23,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:18:23,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:23,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:23,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:23,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:24,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:24,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:24,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... [2020-12-22 10:18:24,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:18:24,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:18:24,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:18:24,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:18:24,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:18:24,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:18:24,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:18:24,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:18:24,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:18:29,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:18:29,837 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:18:29,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:18:29 BoogieIcfgContainer [2020-12-22 10:18:29,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:18:29,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:18:29,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:18:29,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:18:29,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:18:20" (1/3) ... [2020-12-22 10:18:29,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219a43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:18:29, skipping insertion in model container [2020-12-22 10:18:29,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:23" (2/3) ... [2020-12-22 10:18:29,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219a43c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:18:29, skipping insertion in model container [2020-12-22 10:18:29,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:18:29" (3/3) ... [2020-12-22 10:18:29,850 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:18:29,856 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:18:29,862 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:18:29,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:18:29,916 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:18:29,916 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:18:29,916 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:18:29,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:18:29,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:18:29,917 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:18:29,917 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:18:29,917 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:18:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states. [2020-12-22 10:18:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:18:29,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:29,964 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] [2020-12-22 10:18:29,965 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:18:29,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:29,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517103223] [2020-12-22 10:18:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517103223] [2020-12-22 10:18:30,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:30,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:18:30,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535938937] [2020-12-22 10:18:30,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:18:30,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:18:30,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:18:30,370 INFO L87 Difference]: Start difference. First operand 943 states. Second operand 2 states. [2020-12-22 10:18:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:30,472 INFO L93 Difference]: Finished difference Result 1828 states and 3460 transitions. [2020-12-22 10:18:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:18:30,473 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:18:30,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:30,505 INFO L225 Difference]: With dead ends: 1828 [2020-12-22 10:18:30,505 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:18:30,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:18:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:18:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:18:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:18:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1652 transitions. [2020-12-22 10:18:30,658 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1652 transitions. Word has length 42 [2020-12-22 10:18:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:30,659 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1652 transitions. [2020-12-22 10:18:30,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:18:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1652 transitions. [2020-12-22 10:18:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:18:30,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:30,668 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] [2020-12-22 10:18:30,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:18:30,669 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:30,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:30,671 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:18:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:30,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762261621] [2020-12-22 10:18:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762261621] [2020-12-22 10:18:30,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:30,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:18:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278567178] [2020-12-22 10:18:30,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:18:30,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:18:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:18:30,870 INFO L87 Difference]: Start difference. First operand 877 states and 1652 transitions. Second operand 5 states. [2020-12-22 10:18:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:31,028 INFO L93 Difference]: Finished difference Result 948 states and 1763 transitions. [2020-12-22 10:18:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:18:31,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:18:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:31,038 INFO L225 Difference]: With dead ends: 948 [2020-12-22 10:18:31,038 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:18:31,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:18:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:18:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:18:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:18:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1602 transitions. [2020-12-22 10:18:31,064 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1602 transitions. Word has length 42 [2020-12-22 10:18:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:31,065 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1602 transitions. [2020-12-22 10:18:31,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:18:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1602 transitions. [2020-12-22 10:18:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:18:31,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:31,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:31,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:18:31,073 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:31,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:31,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1765816528, now seen corresponding path program 1 times [2020-12-22 10:18:31,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:31,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170239229] [2020-12-22 10:18:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:31,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170239229] [2020-12-22 10:18:31,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:31,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:31,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409378793] [2020-12-22 10:18:31,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:18:31,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:18:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:18:31,362 INFO L87 Difference]: Start difference. First operand 877 states and 1602 transitions. Second operand 4 states. [2020-12-22 10:18:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:42,691 INFO L93 Difference]: Finished difference Result 3132 states and 5911 transitions. [2020-12-22 10:18:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:18:42,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:18:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:42,707 INFO L225 Difference]: With dead ends: 3132 [2020-12-22 10:18:42,707 INFO L226 Difference]: Without dead ends: 2379 [2020-12-22 10:18:42,710 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 10:18:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-12-22 10:18:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2379. [2020-12-22 10:18:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2020-12-22 10:18:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3716 transitions. [2020-12-22 10:18:42,780 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3716 transitions. Word has length 67 [2020-12-22 10:18:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:42,781 INFO L481 AbstractCegarLoop]: Abstraction has 2379 states and 3716 transitions. [2020-12-22 10:18:42,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:18:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3716 transitions. [2020-12-22 10:18:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:42,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:42,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:42,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:18:42,783 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:42,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:18:42,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:42,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421863383] [2020-12-22 10:18:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:42,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421863383] [2020-12-22 10:18:42,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:42,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:42,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749239992] [2020-12-22 10:18:42,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:42,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:42,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:42,890 INFO L87 Difference]: Start difference. First operand 2379 states and 3716 transitions. Second operand 3 states. [2020-12-22 10:18:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:42,942 INFO L93 Difference]: Finished difference Result 2507 states and 3920 transitions. [2020-12-22 10:18:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:42,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:42,957 INFO L225 Difference]: With dead ends: 2507 [2020-12-22 10:18:42,957 INFO L226 Difference]: Without dead ends: 2440 [2020-12-22 10:18:42,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2020-12-22 10:18:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2438. [2020-12-22 10:18:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-12-22 10:18:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3811 transitions. [2020-12-22 10:18:43,023 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3811 transitions. Word has length 91 [2020-12-22 10:18:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:43,024 INFO L481 AbstractCegarLoop]: Abstraction has 2438 states and 3811 transitions. [2020-12-22 10:18:43,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3811 transitions. [2020-12-22 10:18:43,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:43,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:43,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:43,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:18:43,027 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:18:43,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:43,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005360805] [2020-12-22 10:18:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:43,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005360805] [2020-12-22 10:18:43,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:43,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:43,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223840121] [2020-12-22 10:18:43,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:43,195 INFO L87 Difference]: Start difference. First operand 2438 states and 3811 transitions. Second operand 3 states. [2020-12-22 10:18:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:43,264 INFO L93 Difference]: Finished difference Result 2678 states and 4195 transitions. [2020-12-22 10:18:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:43,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:43,278 INFO L225 Difference]: With dead ends: 2678 [2020-12-22 10:18:43,278 INFO L226 Difference]: Without dead ends: 2552 [2020-12-22 10:18:43,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2020-12-22 10:18:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2550. [2020-12-22 10:18:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2550 states. [2020-12-22 10:18:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3990 transitions. [2020-12-22 10:18:43,344 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3990 transitions. Word has length 91 [2020-12-22 10:18:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:43,346 INFO L481 AbstractCegarLoop]: Abstraction has 2550 states and 3990 transitions. [2020-12-22 10:18:43,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3990 transitions. [2020-12-22 10:18:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:43,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:43,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:18:43,351 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:18:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:43,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925945160] [2020-12-22 10:18:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:43,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925945160] [2020-12-22 10:18:43,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:43,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:43,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615956973] [2020-12-22 10:18:43,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:43,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:43,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:43,468 INFO L87 Difference]: Start difference. First operand 2550 states and 3990 transitions. Second operand 3 states. [2020-12-22 10:18:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:43,539 INFO L93 Difference]: Finished difference Result 3002 states and 4712 transitions. [2020-12-22 10:18:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:43,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:43,558 INFO L225 Difference]: With dead ends: 3002 [2020-12-22 10:18:43,559 INFO L226 Difference]: Without dead ends: 2764 [2020-12-22 10:18:43,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2020-12-22 10:18:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2762. [2020-12-22 10:18:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2020-12-22 10:18:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 4326 transitions. [2020-12-22 10:18:43,637 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 4326 transitions. Word has length 91 [2020-12-22 10:18:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:43,638 INFO L481 AbstractCegarLoop]: Abstraction has 2762 states and 4326 transitions. [2020-12-22 10:18:43,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 4326 transitions. [2020-12-22 10:18:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:43,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:43,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:43,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:18:43,644 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:18:43,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:43,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830970726] [2020-12-22 10:18:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:43,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830970726] [2020-12-22 10:18:43,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:43,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:43,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796667128] [2020-12-22 10:18:43,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:43,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:43,763 INFO L87 Difference]: Start difference. First operand 2762 states and 4326 transitions. Second operand 3 states. [2020-12-22 10:18:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:43,837 INFO L93 Difference]: Finished difference Result 3614 states and 5680 transitions. [2020-12-22 10:18:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:43,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:43,854 INFO L225 Difference]: With dead ends: 3614 [2020-12-22 10:18:43,854 INFO L226 Difference]: Without dead ends: 3164 [2020-12-22 10:18:43,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2020-12-22 10:18:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3162. [2020-12-22 10:18:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3162 states. [2020-12-22 10:18:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 4954 transitions. [2020-12-22 10:18:43,952 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 4954 transitions. Word has length 91 [2020-12-22 10:18:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:43,952 INFO L481 AbstractCegarLoop]: Abstraction has 3162 states and 4954 transitions. [2020-12-22 10:18:43,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 4954 transitions. [2020-12-22 10:18:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:43,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:43,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:43,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:18:43,954 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:43,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:18:43,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:43,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133786534] [2020-12-22 10:18:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133786534] [2020-12-22 10:18:44,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:44,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:44,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795444669] [2020-12-22 10:18:44,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:44,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:44,049 INFO L87 Difference]: Start difference. First operand 3162 states and 4954 transitions. Second operand 3 states. [2020-12-22 10:18:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:44,162 INFO L93 Difference]: Finished difference Result 4766 states and 7484 transitions. [2020-12-22 10:18:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:44,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:44,183 INFO L225 Difference]: With dead ends: 4766 [2020-12-22 10:18:44,183 INFO L226 Difference]: Without dead ends: 3916 [2020-12-22 10:18:44,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-12-22 10:18:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3914. [2020-12-22 10:18:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3914 states. [2020-12-22 10:18:44,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 6122 transitions. [2020-12-22 10:18:44,338 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 6122 transitions. Word has length 91 [2020-12-22 10:18:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:44,338 INFO L481 AbstractCegarLoop]: Abstraction has 3914 states and 6122 transitions. [2020-12-22 10:18:44,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 6122 transitions. [2020-12-22 10:18:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:44,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:44,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:44,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:18:44,340 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:18:44,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:44,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187866106] [2020-12-22 10:18:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:44,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187866106] [2020-12-22 10:18:44,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:44,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133127408] [2020-12-22 10:18:44,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:44,574 INFO L87 Difference]: Start difference. First operand 3914 states and 6122 transitions. Second operand 9 states. [2020-12-22 10:18:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:45,915 INFO L93 Difference]: Finished difference Result 26342 states and 41304 transitions. [2020-12-22 10:18:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:18:45,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:18:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:46,015 INFO L225 Difference]: With dead ends: 26342 [2020-12-22 10:18:46,015 INFO L226 Difference]: Without dead ends: 24740 [2020-12-22 10:18:46,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:18:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24740 states. [2020-12-22 10:18:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24740 to 5514. [2020-12-22 10:18:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5514 states. [2020-12-22 10:18:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 8570 transitions. [2020-12-22 10:18:46,639 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 8570 transitions. Word has length 91 [2020-12-22 10:18:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:46,640 INFO L481 AbstractCegarLoop]: Abstraction has 5514 states and 8570 transitions. [2020-12-22 10:18:46,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 8570 transitions. [2020-12-22 10:18:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:46,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:46,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:46,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:18:46,642 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:46,642 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:18:46,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:46,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800201254] [2020-12-22 10:18:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:46,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800201254] [2020-12-22 10:18:46,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:46,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:46,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115285982] [2020-12-22 10:18:46,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:46,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:46,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:46,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:46,736 INFO L87 Difference]: Start difference. First operand 5514 states and 8570 transitions. Second operand 3 states. [2020-12-22 10:18:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:47,134 INFO L93 Difference]: Finished difference Result 10240 states and 15886 transitions. [2020-12-22 10:18:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:47,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:18:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:47,153 INFO L225 Difference]: With dead ends: 10240 [2020-12-22 10:18:47,154 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:18:47,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:18:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:18:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:18:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10876 transitions. [2020-12-22 10:18:47,618 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10876 transitions. Word has length 93 [2020-12-22 10:18:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:47,619 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10876 transitions. [2020-12-22 10:18:47,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10876 transitions. [2020-12-22 10:18:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:47,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:47,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:47,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:18:47,621 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:18:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:47,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518155530] [2020-12-22 10:18:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:47,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518155530] [2020-12-22 10:18:47,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:47,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:47,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688888166] [2020-12-22 10:18:47,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:47,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:47,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:47,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:47,971 INFO L87 Difference]: Start difference. First operand 7036 states and 10876 transitions. Second operand 9 states. [2020-12-22 10:18:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:48,912 INFO L93 Difference]: Finished difference Result 11760 states and 18142 transitions. [2020-12-22 10:18:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:48,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:18:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:48,930 INFO L225 Difference]: With dead ends: 11760 [2020-12-22 10:18:48,930 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:18:48,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:18:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:18:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:18:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:18:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10828 transitions. [2020-12-22 10:18:49,368 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10828 transitions. Word has length 93 [2020-12-22 10:18:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:49,369 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10828 transitions. [2020-12-22 10:18:49,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10828 transitions. [2020-12-22 10:18:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:49,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:49,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:49,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:18:49,371 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:49,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:18:49,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:49,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261485277] [2020-12-22 10:18:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:49,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261485277] [2020-12-22 10:18:49,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:49,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:49,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686356556] [2020-12-22 10:18:49,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:49,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:49,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:49,446 INFO L87 Difference]: Start difference. First operand 7036 states and 10828 transitions. Second operand 3 states. [2020-12-22 10:18:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:50,045 INFO L93 Difference]: Finished difference Result 15904 states and 24302 transitions. [2020-12-22 10:18:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:50,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:18:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:50,069 INFO L225 Difference]: With dead ends: 15904 [2020-12-22 10:18:50,069 INFO L226 Difference]: Without dead ends: 11182 [2020-12-22 10:18:50,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11182 states. [2020-12-22 10:18:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11182 to 11180. [2020-12-22 10:18:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11180 states. [2020-12-22 10:18:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 16988 transitions. [2020-12-22 10:18:50,826 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 16988 transitions. Word has length 93 [2020-12-22 10:18:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:50,827 INFO L481 AbstractCegarLoop]: Abstraction has 11180 states and 16988 transitions. [2020-12-22 10:18:50,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:50,827 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 16988 transitions. [2020-12-22 10:18:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:50,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:50,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:50,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:18:50,829 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:18:50,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:50,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541611472] [2020-12-22 10:18:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:50,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541611472] [2020-12-22 10:18:50,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:50,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:50,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848965962] [2020-12-22 10:18:50,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:50,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:50,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:50,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:50,903 INFO L87 Difference]: Start difference. First operand 11180 states and 16988 transitions. Second operand 3 states. [2020-12-22 10:18:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:51,858 INFO L93 Difference]: Finished difference Result 27760 states and 41822 transitions. [2020-12-22 10:18:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:51,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:18:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:51,899 INFO L225 Difference]: With dead ends: 27760 [2020-12-22 10:18:51,899 INFO L226 Difference]: Without dead ends: 18894 [2020-12-22 10:18:51,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18894 states. [2020-12-22 10:18:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18894 to 18892. [2020-12-22 10:18:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:18:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 28252 transitions. [2020-12-22 10:18:52,931 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 28252 transitions. Word has length 93 [2020-12-22 10:18:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:52,931 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 28252 transitions. [2020-12-22 10:18:52,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 28252 transitions. [2020-12-22 10:18:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:18:52,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:52,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:52,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:18:52,933 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:18:52,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:52,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667701876] [2020-12-22 10:18:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:53,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667701876] [2020-12-22 10:18:53,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:53,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:18:53,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388307171] [2020-12-22 10:18:53,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:18:53,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:18:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:18:53,036 INFO L87 Difference]: Start difference. First operand 18892 states and 28252 transitions. Second operand 6 states. [2020-12-22 10:18:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:54,315 INFO L93 Difference]: Finished difference Result 35470 states and 52893 transitions. [2020-12-22 10:18:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:18:54,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:18:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:54,347 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:18:54,347 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:18:54,370 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 10:18:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:18:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:18:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:18:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 27996 transitions. [2020-12-22 10:18:55,577 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 27996 transitions. Word has length 94 [2020-12-22 10:18:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:55,577 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 27996 transitions. [2020-12-22 10:18:55,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:18:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 27996 transitions. [2020-12-22 10:18:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:18:55,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:55,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:55,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:18:55,579 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:18:55,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:55,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629850752] [2020-12-22 10:18:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:55,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629850752] [2020-12-22 10:18:55,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:55,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:18:55,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311756258] [2020-12-22 10:18:55,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:18:55,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:55,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:18:55,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:18:55,695 INFO L87 Difference]: Start difference. First operand 18892 states and 27996 transitions. Second operand 6 states. [2020-12-22 10:18:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:56,721 INFO L93 Difference]: Finished difference Result 35470 states and 52381 transitions. [2020-12-22 10:18:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:18:56,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:18:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:56,757 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:18:56,758 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:18:56,779 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 10:18:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:18:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:18:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:18:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 27804 transitions. [2020-12-22 10:18:57,947 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 27804 transitions. Word has length 94 [2020-12-22 10:18:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:57,947 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 27804 transitions. [2020-12-22 10:18:57,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:18:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 27804 transitions. [2020-12-22 10:18:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:18:57,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:57,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:57,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:18:57,949 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:57,950 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:18:57,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:57,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634826417] [2020-12-22 10:18:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:58,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634826417] [2020-12-22 10:18:58,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:58,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:18:58,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673417933] [2020-12-22 10:18:58,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:18:58,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:18:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:18:58,071 INFO L87 Difference]: Start difference. First operand 18892 states and 27804 transitions. Second operand 8 states. [2020-12-22 10:19:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:01,100 INFO L93 Difference]: Finished difference Result 33135 states and 48198 transitions. [2020-12-22 10:19:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:19:01,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:19:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:01,150 INFO L225 Difference]: With dead ends: 33135 [2020-12-22 10:19:01,150 INFO L226 Difference]: Without dead ends: 33133 [2020-12-22 10:19:01,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33133 states. [2020-12-22 10:19:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33133 to 19660. [2020-12-22 10:19:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19660 states. [2020-12-22 10:19:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19660 states to 19660 states and 28508 transitions. [2020-12-22 10:19:02,848 INFO L78 Accepts]: Start accepts. Automaton has 19660 states and 28508 transitions. Word has length 94 [2020-12-22 10:19:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:02,848 INFO L481 AbstractCegarLoop]: Abstraction has 19660 states and 28508 transitions. [2020-12-22 10:19:02,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:19:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19660 states and 28508 transitions. [2020-12-22 10:19:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:02,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:02,862 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:02,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:19:02,862 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1704205326, now seen corresponding path program 1 times [2020-12-22 10:19:02,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:02,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390662915] [2020-12-22 10:19:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:19:03,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390662915] [2020-12-22 10:19:03,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:03,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:03,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065824422] [2020-12-22 10:19:03,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:03,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:03,041 INFO L87 Difference]: Start difference. First operand 19660 states and 28508 transitions. Second operand 9 states. [2020-12-22 10:19:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:11,289 INFO L93 Difference]: Finished difference Result 144476 states and 207492 transitions. [2020-12-22 10:19:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:11,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:11,634 INFO L225 Difference]: With dead ends: 144476 [2020-12-22 10:19:11,635 INFO L226 Difference]: Without dead ends: 127130 [2020-12-22 10:19:11,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127130 states. [2020-12-22 10:19:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127130 to 37004. [2020-12-22 10:19:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37004 states. [2020-12-22 10:19:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37004 states to 37004 states and 53212 transitions. [2020-12-22 10:19:15,428 INFO L78 Accepts]: Start accepts. Automaton has 37004 states and 53212 transitions. Word has length 129 [2020-12-22 10:19:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:15,428 INFO L481 AbstractCegarLoop]: Abstraction has 37004 states and 53212 transitions. [2020-12-22 10:19:15,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 37004 states and 53212 transitions. [2020-12-22 10:19:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:15,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:15,444 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:15,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:19:15,445 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:15,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:15,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1343254354, now seen corresponding path program 1 times [2020-12-22 10:19:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:15,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927825093] [2020-12-22 10:19:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:19:15,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927825093] [2020-12-22 10:19:15,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:15,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196269628] [2020-12-22 10:19:15,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:15,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:15,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:15,621 INFO L87 Difference]: Start difference. First operand 37004 states and 53212 transitions. Second operand 9 states. [2020-12-22 10:19:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:25,795 INFO L93 Difference]: Finished difference Result 161820 states and 232196 transitions. [2020-12-22 10:19:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:25,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:25,985 INFO L225 Difference]: With dead ends: 161820 [2020-12-22 10:19:25,985 INFO L226 Difference]: Without dead ends: 144474 [2020-12-22 10:19:26,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144474 states. [2020-12-22 10:19:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144474 to 63052. [2020-12-22 10:19:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63052 states. [2020-12-22 10:19:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63052 states to 63052 states and 90108 transitions. [2020-12-22 10:19:31,815 INFO L78 Accepts]: Start accepts. Automaton has 63052 states and 90108 transitions. Word has length 129 [2020-12-22 10:19:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:31,815 INFO L481 AbstractCegarLoop]: Abstraction has 63052 states and 90108 transitions. [2020-12-22 10:19:31,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 63052 states and 90108 transitions. [2020-12-22 10:19:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:31,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:31,835 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:31,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:19:31,835 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:31,836 INFO L82 PathProgramCache]: Analyzing trace with hash 126178628, now seen corresponding path program 1 times [2020-12-22 10:19:31,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:31,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647457183] [2020-12-22 10:19:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:19:32,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647457183] [2020-12-22 10:19:32,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:32,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:32,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586926173] [2020-12-22 10:19:32,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:32,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:32,047 INFO L87 Difference]: Start difference. First operand 63052 states and 90108 transitions. Second operand 9 states. [2020-12-22 10:19:44,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:44,154 INFO L93 Difference]: Finished difference Result 179164 states and 256900 transitions. [2020-12-22 10:19:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:44,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:44,537 INFO L225 Difference]: With dead ends: 179164 [2020-12-22 10:19:44,537 INFO L226 Difference]: Without dead ends: 161818 [2020-12-22 10:19:44,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161818 states. [2020-12-22 10:19:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161818 to 80396. [2020-12-22 10:19:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80396 states. [2020-12-22 10:19:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80396 states to 80396 states and 114812 transitions. [2020-12-22 10:19:51,909 INFO L78 Accepts]: Start accepts. Automaton has 80396 states and 114812 transitions. Word has length 129 [2020-12-22 10:19:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:51,909 INFO L481 AbstractCegarLoop]: Abstraction has 80396 states and 114812 transitions. [2020-12-22 10:19:51,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 80396 states and 114812 transitions. [2020-12-22 10:19:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:51,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:51,932 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:51,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:19:51,932 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1109280412, now seen corresponding path program 1 times [2020-12-22 10:19:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:51,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809893844] [2020-12-22 10:19:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:19:52,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809893844] [2020-12-22 10:19:52,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:52,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:52,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314025851] [2020-12-22 10:19:52,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:52,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:52,136 INFO L87 Difference]: Start difference. First operand 80396 states and 114812 transitions. Second operand 9 states. [2020-12-22 10:20:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:06,483 INFO L93 Difference]: Finished difference Result 196508 states and 281604 transitions. [2020-12-22 10:20:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:06,484 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:06,906 INFO L225 Difference]: With dead ends: 196508 [2020-12-22 10:20:06,907 INFO L226 Difference]: Without dead ends: 179162 [2020-12-22 10:20:06,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179162 states. [2020-12-22 10:20:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179162 to 97740. [2020-12-22 10:20:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97740 states. [2020-12-22 10:20:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97740 states to 97740 states and 139516 transitions. [2020-12-22 10:20:16,452 INFO L78 Accepts]: Start accepts. Automaton has 97740 states and 139516 transitions. Word has length 129 [2020-12-22 10:20:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:16,453 INFO L481 AbstractCegarLoop]: Abstraction has 97740 states and 139516 transitions. [2020-12-22 10:20:16,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:20:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 97740 states and 139516 transitions. [2020-12-22 10:20:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:20:16,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:16,473 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:20:16,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:20:16,473 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1764691332, now seen corresponding path program 1 times [2020-12-22 10:20:16,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:16,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722668271] [2020-12-22 10:20:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:20:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722668271] [2020-12-22 10:20:16,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:16,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:20:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484354400] [2020-12-22 10:20:16,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:20:16,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:16,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:20:16,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:20:16,654 INFO L87 Difference]: Start difference. First operand 97740 states and 139516 transitions. Second operand 9 states. [2020-12-22 10:20:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:34,217 INFO L93 Difference]: Finished difference Result 213852 states and 306308 transitions. [2020-12-22 10:20:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:34,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:34,686 INFO L225 Difference]: With dead ends: 213852 [2020-12-22 10:20:34,686 INFO L226 Difference]: Without dead ends: 196506 [2020-12-22 10:20:34,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196506 states. [2020-12-22 10:20:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196506 to 115084. [2020-12-22 10:20:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115084 states. [2020-12-22 10:20:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115084 states to 115084 states and 164220 transitions. [2020-12-22 10:20:46,363 INFO L78 Accepts]: Start accepts. Automaton has 115084 states and 164220 transitions. Word has length 129 [2020-12-22 10:20:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:46,363 INFO L481 AbstractCegarLoop]: Abstraction has 115084 states and 164220 transitions. [2020-12-22 10:20:46,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:20:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 115084 states and 164220 transitions. [2020-12-22 10:20:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:20:46,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:46,379 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:20:46,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:20:46,380 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1198870948, now seen corresponding path program 1 times [2020-12-22 10:20:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:46,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121490729] [2020-12-22 10:20:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:20:46,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121490729] [2020-12-22 10:20:46,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:46,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:20:46,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383799660] [2020-12-22 10:20:46,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:20:46,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:20:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:20:46,572 INFO L87 Difference]: Start difference. First operand 115084 states and 164220 transitions. Second operand 9 states. [2020-12-22 10:21:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:07,884 INFO L93 Difference]: Finished difference Result 231196 states and 331012 transitions. [2020-12-22 10:21:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:21:07,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:21:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:08,387 INFO L225 Difference]: With dead ends: 231196 [2020-12-22 10:21:08,387 INFO L226 Difference]: Without dead ends: 213850 [2020-12-22 10:21:08,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:21:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213850 states. [2020-12-22 10:21:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213850 to 132428. [2020-12-22 10:21:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132428 states. [2020-12-22 10:21:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132428 states to 132428 states and 188924 transitions. [2020-12-22 10:21:22,977 INFO L78 Accepts]: Start accepts. Automaton has 132428 states and 188924 transitions. Word has length 129 [2020-12-22 10:21:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:22,977 INFO L481 AbstractCegarLoop]: Abstraction has 132428 states and 188924 transitions. [2020-12-22 10:21:22,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:21:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 132428 states and 188924 transitions. [2020-12-22 10:21:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:21:22,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:22,998 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:22,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:21:22,998 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:22,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:22,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1388086724, now seen corresponding path program 1 times [2020-12-22 10:21:22,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:22,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640466681] [2020-12-22 10:21:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:21:23,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640466681] [2020-12-22 10:21:23,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:23,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:21:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140255845] [2020-12-22 10:21:23,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:21:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:21:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:21:23,417 INFO L87 Difference]: Start difference. First operand 132428 states and 188924 transitions. Second operand 9 states. [2020-12-22 10:21:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:47,590 INFO L93 Difference]: Finished difference Result 237916 states and 340740 transitions. [2020-12-22 10:21:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:21:47,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:21:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:48,085 INFO L225 Difference]: With dead ends: 237916 [2020-12-22 10:21:48,085 INFO L226 Difference]: Without dead ends: 225882 [2020-12-22 10:21:48,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:21:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225882 states. [2020-12-22 10:22:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225882 to 144460. [2020-12-22 10:22:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144460 states. [2020-12-22 10:22:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144460 states to 144460 states and 206204 transitions. [2020-12-22 10:22:04,714 INFO L78 Accepts]: Start accepts. Automaton has 144460 states and 206204 transitions. Word has length 129 [2020-12-22 10:22:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:04,714 INFO L481 AbstractCegarLoop]: Abstraction has 144460 states and 206204 transitions. [2020-12-22 10:22:04,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:22:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 144460 states and 206204 transitions. [2020-12-22 10:22:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:22:04,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:04,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:04,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:22:04,734 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash -342494627, now seen corresponding path program 1 times [2020-12-22 10:22:04,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:04,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892013174] [2020-12-22 10:22:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:04,812 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 10:22:04,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892013174] [2020-12-22 10:22:04,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:04,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:22:04,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358925579] [2020-12-22 10:22:04,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:22:04,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:04,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:22:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:22:04,817 INFO L87 Difference]: Start difference. First operand 144460 states and 206204 transitions. Second operand 3 states.