/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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:26:50,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:26:50,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:26:50,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:26:50,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:26:50,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:26:50,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:26:50,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:26:50,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:26:50,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:26:50,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:26:50,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:26:50,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:26:50,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:26:50,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:26:50,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:26:50,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:26:50,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:26:50,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:26:50,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:26:50,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:26:50,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:26:50,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:26:50,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:26:50,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:26:50,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:26:50,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:26:50,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:26:50,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:26:50,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:26:50,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:26:50,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:26:50,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:26:50,963 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:26:50,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:26:50,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:26:50,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:26:50,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:26:50,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:26:50,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:26:50,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:26:50,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:26:50,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:26:50,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:26:50,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:26:50,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:26:50,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:26:50,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:26:50,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:26:50,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:26:50,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:26:50,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:26:50,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:26:50,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:26:50,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:26:51,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:26:51,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:26:51,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:26:51,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:26:51,417 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:26:51,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:26:51,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7529a85/5a4fbc724e4d40b8937ff1bc64b442c2/FLAGd12a36157 [2020-12-22 10:26:52,440 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:26:52,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:26:52,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7529a85/5a4fbc724e4d40b8937ff1bc64b442c2/FLAGd12a36157 [2020-12-22 10:26:52,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd7529a85/5a4fbc724e4d40b8937ff1bc64b442c2 [2020-12-22 10:26:52,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:26:52,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:26:52,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:26:52,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:26:52,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:26:52,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:26:52" (1/1) ... [2020-12-22 10:26:52,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538adbe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:52, skipping insertion in model container [2020-12-22 10:26:52,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:26:52" (1/1) ... [2020-12-22 10:26:52,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:26:53,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:26:53,603 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[26949,26962] [2020-12-22 10:26:53,696 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[34454,34467] [2020-12-22 10:26:54,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:26:54,701 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:26:54,795 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[26949,26962] [2020-12-22 10:26:54,810 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.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[34454,34467] [2020-12-22 10:26:55,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:26:55,464 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:26:55,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55 WrapperNode [2020-12-22 10:26:55,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:26:55,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:26:55,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:26:55,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:26:55,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:55,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:55,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:26:55,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:26:55,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:26:55,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:26:55,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:55,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:56,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:56,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:56,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:56,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:56,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (1/1) ... [2020-12-22 10:26:56,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:26:56,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:26:56,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:26:56,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:26:56,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (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 10:26:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:26:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:26:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:26:56,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:27:01,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:27:01,943 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:27:01,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:27:01 BoogieIcfgContainer [2020-12-22 10:27:01,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:27:01,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:27:01,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:27:01,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:27:01,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:26:52" (1/3) ... [2020-12-22 10:27:01,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9ee5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:27:01, skipping insertion in model container [2020-12-22 10:27:01,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:26:55" (2/3) ... [2020-12-22 10:27:01,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9ee5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:27:01, skipping insertion in model container [2020-12-22 10:27:01,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:27:01" (3/3) ... [2020-12-22 10:27:01,955 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:27:01,962 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:27:01,968 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:27:01,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:27:02,020 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:27:02,020 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:27:02,020 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:27:02,021 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:27:02,021 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:27:02,021 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:27:02,021 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:27:02,021 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:27:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states. [2020-12-22 10:27:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:27:02,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:02,066 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] [2020-12-22 10:27:02,067 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:27:02,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:02,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961229187] [2020-12-22 10:27:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:02,344 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 10:27:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961229187] [2020-12-22 10:27:02,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:02,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:27:02,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275851666] [2020-12-22 10:27:02,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:27:02,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:27:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:27:02,369 INFO L87 Difference]: Start difference. First operand 962 states. Second operand 2 states. [2020-12-22 10:27:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:02,453 INFO L93 Difference]: Finished difference Result 1855 states and 3508 transitions. [2020-12-22 10:27:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:27:02,455 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:27:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:02,481 INFO L225 Difference]: With dead ends: 1855 [2020-12-22 10:27:02,482 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 10:27:02,490 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 10:27:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 10:27:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2020-12-22 10:27:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 10:27:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1687 transitions. [2020-12-22 10:27:02,599 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1687 transitions. Word has length 46 [2020-12-22 10:27:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:02,599 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1687 transitions. [2020-12-22 10:27:02,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:27:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1687 transitions. [2020-12-22 10:27:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:27:02,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:02,605 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] [2020-12-22 10:27:02,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:27:02,606 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:02,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:27:02,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:02,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753834029] [2020-12-22 10:27:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:02,840 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 10:27:02,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753834029] [2020-12-22 10:27:02,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:02,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:27:02,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499637377] [2020-12-22 10:27:02,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:27:02,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:27:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:27:02,846 INFO L87 Difference]: Start difference. First operand 896 states and 1687 transitions. Second operand 5 states. [2020-12-22 10:27:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:03,113 INFO L93 Difference]: Finished difference Result 975 states and 1811 transitions. [2020-12-22 10:27:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:27:03,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:27:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:03,122 INFO L225 Difference]: With dead ends: 975 [2020-12-22 10:27:03,122 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 10:27:03,123 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 10:27:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 10:27:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2020-12-22 10:27:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 10:27:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1626 transitions. [2020-12-22 10:27:03,159 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1626 transitions. Word has length 46 [2020-12-22 10:27:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:03,160 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1626 transitions. [2020-12-22 10:27:03,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:27:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1626 transitions. [2020-12-22 10:27:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:27:03,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:03,169 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 10:27:03,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:27:03,170 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:03,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1106656147, now seen corresponding path program 1 times [2020-12-22 10:27:03,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:03,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595323577] [2020-12-22 10:27:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:03,460 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 10:27:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595323577] [2020-12-22 10:27:03,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:03,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:03,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994409541] [2020-12-22 10:27:03,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:27:03,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:03,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:27:03,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:27:03,466 INFO L87 Difference]: Start difference. First operand 896 states and 1626 transitions. Second operand 4 states. [2020-12-22 10:27:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:14,139 INFO L93 Difference]: Finished difference Result 3151 states and 5935 transitions. [2020-12-22 10:27:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:27:14,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:27:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:14,155 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 10:27:14,156 INFO L226 Difference]: Without dead ends: 2398 [2020-12-22 10:27:14,158 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 10:27:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2020-12-22 10:27:14,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2398. [2020-12-22 10:27:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2398 states. [2020-12-22 10:27:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3602 transitions. [2020-12-22 10:27:14,228 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3602 transitions. Word has length 67 [2020-12-22 10:27:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:14,229 INFO L481 AbstractCegarLoop]: Abstraction has 2398 states and 3602 transitions. [2020-12-22 10:27:14,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:27:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3602 transitions. [2020-12-22 10:27:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:27:14,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:14,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:14,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:27:14,233 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:14,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:27:14,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:14,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802526484] [2020-12-22 10:27:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:14,396 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 10:27:14,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802526484] [2020-12-22 10:27:14,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:14,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:14,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307362513] [2020-12-22 10:27:14,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:14,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:14,403 INFO L87 Difference]: Start difference. First operand 2398 states and 3602 transitions. Second operand 3 states. [2020-12-22 10:27:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:14,466 INFO L93 Difference]: Finished difference Result 2542 states and 3832 transitions. [2020-12-22 10:27:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:14,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:27:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:14,484 INFO L225 Difference]: With dead ends: 2542 [2020-12-22 10:27:14,485 INFO L226 Difference]: Without dead ends: 2467 [2020-12-22 10:27:14,486 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 10:27:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2020-12-22 10:27:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2465. [2020-12-22 10:27:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 10:27:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3710 transitions. [2020-12-22 10:27:14,607 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3710 transitions. Word has length 106 [2020-12-22 10:27:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:14,609 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3710 transitions. [2020-12-22 10:27:14,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3710 transitions. [2020-12-22 10:27:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:27:14,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:14,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:14,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:27:14,611 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:27:14,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:14,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200506982] [2020-12-22 10:27:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:14,707 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 10:27:14,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200506982] [2020-12-22 10:27:14,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:14,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:14,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364125463] [2020-12-22 10:27:14,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:14,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:14,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:14,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:14,711 INFO L87 Difference]: Start difference. First operand 2465 states and 3710 transitions. Second operand 3 states. [2020-12-22 10:27:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:14,771 INFO L93 Difference]: Finished difference Result 2737 states and 4146 transitions. [2020-12-22 10:27:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:14,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:27:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:14,786 INFO L225 Difference]: With dead ends: 2737 [2020-12-22 10:27:14,787 INFO L226 Difference]: Without dead ends: 2595 [2020-12-22 10:27:14,788 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 10:27:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2020-12-22 10:27:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2593. [2020-12-22 10:27:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2593 states. [2020-12-22 10:27:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3915 transitions. [2020-12-22 10:27:14,852 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3915 transitions. Word has length 106 [2020-12-22 10:27:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:14,853 INFO L481 AbstractCegarLoop]: Abstraction has 2593 states and 3915 transitions. [2020-12-22 10:27:14,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3915 transitions. [2020-12-22 10:27:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:27:14,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:14,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:14,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:27:14,861 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:14,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:27:14,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:14,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589599193] [2020-12-22 10:27:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:15,022 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 10:27:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589599193] [2020-12-22 10:27:15,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:15,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:15,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613006766] [2020-12-22 10:27:15,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:15,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:15,026 INFO L87 Difference]: Start difference. First operand 2593 states and 3915 transitions. Second operand 3 states. [2020-12-22 10:27:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:15,112 INFO L93 Difference]: Finished difference Result 3109 states and 4741 transitions. [2020-12-22 10:27:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:15,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:27:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:15,136 INFO L225 Difference]: With dead ends: 3109 [2020-12-22 10:27:15,136 INFO L226 Difference]: Without dead ends: 2839 [2020-12-22 10:27:15,138 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 10:27:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2020-12-22 10:27:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2837. [2020-12-22 10:27:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2837 states. [2020-12-22 10:27:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 4303 transitions. [2020-12-22 10:27:15,240 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 4303 transitions. Word has length 106 [2020-12-22 10:27:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:15,242 INFO L481 AbstractCegarLoop]: Abstraction has 2837 states and 4303 transitions. [2020-12-22 10:27:15,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 4303 transitions. [2020-12-22 10:27:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:27:15,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:15,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:15,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:27:15,245 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:15,248 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:27:15,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:15,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124194340] [2020-12-22 10:27:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:15,373 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 10:27:15,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124194340] [2020-12-22 10:27:15,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:15,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:15,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50903695] [2020-12-22 10:27:15,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:15,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:15,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:15,376 INFO L87 Difference]: Start difference. First operand 2837 states and 4303 transitions. Second operand 3 states. [2020-12-22 10:27:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:15,453 INFO L93 Difference]: Finished difference Result 3817 states and 5865 transitions. [2020-12-22 10:27:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:15,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:27:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:15,473 INFO L225 Difference]: With dead ends: 3817 [2020-12-22 10:27:15,473 INFO L226 Difference]: Without dead ends: 3303 [2020-12-22 10:27:15,475 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 10:27:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2020-12-22 10:27:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 3301. [2020-12-22 10:27:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3301 states. [2020-12-22 10:27:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 5035 transitions. [2020-12-22 10:27:15,577 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 5035 transitions. Word has length 106 [2020-12-22 10:27:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:15,577 INFO L481 AbstractCegarLoop]: Abstraction has 3301 states and 5035 transitions. [2020-12-22 10:27:15,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 5035 transitions. [2020-12-22 10:27:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:27:15,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:15,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:15,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:27:15,580 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:27:15,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:15,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253454482] [2020-12-22 10:27:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:15,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253454482] [2020-12-22 10:27:15,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:15,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:15,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758646984] [2020-12-22 10:27:15,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:15,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:15,781 INFO L87 Difference]: Start difference. First operand 3301 states and 5035 transitions. Second operand 10 states. [2020-12-22 10:27:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:17,005 INFO L93 Difference]: Finished difference Result 18949 states and 29883 transitions. [2020-12-22 10:27:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:27:17,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:27:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:17,100 INFO L225 Difference]: With dead ends: 18949 [2020-12-22 10:27:17,100 INFO L226 Difference]: Without dead ends: 17971 [2020-12-22 10:27:17,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:27:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17971 states. [2020-12-22 10:27:17,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17971 to 4277. [2020-12-22 10:27:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4277 states. [2020-12-22 10:27:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 6555 transitions. [2020-12-22 10:27:17,484 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 6555 transitions. Word has length 106 [2020-12-22 10:27:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:17,485 INFO L481 AbstractCegarLoop]: Abstraction has 4277 states and 6555 transitions. [2020-12-22 10:27:17,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 6555 transitions. [2020-12-22 10:27:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:27:17,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:17,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:17,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:27:17,487 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:17,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:27:17,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:17,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138628294] [2020-12-22 10:27:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:17,605 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 10:27:17,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138628294] [2020-12-22 10:27:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377905914] [2020-12-22 10:27:17,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:17,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:17,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:17,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:17,609 INFO L87 Difference]: Start difference. First operand 4277 states and 6555 transitions. Second operand 3 states. [2020-12-22 10:27:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:17,870 INFO L93 Difference]: Finished difference Result 7171 states and 11103 transitions. [2020-12-22 10:27:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:17,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:27:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:17,882 INFO L225 Difference]: With dead ends: 7171 [2020-12-22 10:27:17,882 INFO L226 Difference]: Without dead ends: 5217 [2020-12-22 10:27:17,886 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 10:27:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2020-12-22 10:27:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5215. [2020-12-22 10:27:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5215 states. [2020-12-22 10:27:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 8005 transitions. [2020-12-22 10:27:18,270 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 8005 transitions. Word has length 108 [2020-12-22 10:27:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:18,270 INFO L481 AbstractCegarLoop]: Abstraction has 5215 states and 8005 transitions. [2020-12-22 10:27:18,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 8005 transitions. [2020-12-22 10:27:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:27:18,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:18,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:18,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:27:18,272 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:27:18,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:18,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717562446] [2020-12-22 10:27:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:18,709 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 10:27:18,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717562446] [2020-12-22 10:27:18,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:18,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:18,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788384248] [2020-12-22 10:27:18,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:18,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:18,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:18,712 INFO L87 Difference]: Start difference. First operand 5215 states and 8005 transitions. Second operand 10 states. [2020-12-22 10:27:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:19,507 INFO L93 Difference]: Finished difference Result 8107 states and 12527 transitions. [2020-12-22 10:27:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:19,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:27:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:19,519 INFO L225 Difference]: With dead ends: 8107 [2020-12-22 10:27:19,519 INFO L226 Difference]: Without dead ends: 5217 [2020-12-22 10:27:19,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:27:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2020-12-22 10:27:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5215. [2020-12-22 10:27:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5215 states. [2020-12-22 10:27:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5215 states to 5215 states and 7981 transitions. [2020-12-22 10:27:19,764 INFO L78 Accepts]: Start accepts. Automaton has 5215 states and 7981 transitions. Word has length 108 [2020-12-22 10:27:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:19,765 INFO L481 AbstractCegarLoop]: Abstraction has 5215 states and 7981 transitions. [2020-12-22 10:27:19,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:27:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5215 states and 7981 transitions. [2020-12-22 10:27:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:27:19,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:19,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:19,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:27:19,767 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:19,767 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:27:19,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:19,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225795207] [2020-12-22 10:27:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:19,854 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 10:27:19,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225795207] [2020-12-22 10:27:19,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:19,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80367112] [2020-12-22 10:27:19,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:19,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:19,857 INFO L87 Difference]: Start difference. First operand 5215 states and 7981 transitions. Second operand 3 states. [2020-12-22 10:27:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:20,229 INFO L93 Difference]: Finished difference Result 10707 states and 16495 transitions. [2020-12-22 10:27:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:20,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:27:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:20,247 INFO L225 Difference]: With dead ends: 10707 [2020-12-22 10:27:20,247 INFO L226 Difference]: Without dead ends: 7817 [2020-12-22 10:27:20,253 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 10:27:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2020-12-22 10:27:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7815. [2020-12-22 10:27:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7815 states. [2020-12-22 10:27:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 11949 transitions. [2020-12-22 10:27:20,703 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 11949 transitions. Word has length 108 [2020-12-22 10:27:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:20,704 INFO L481 AbstractCegarLoop]: Abstraction has 7815 states and 11949 transitions. [2020-12-22 10:27:20,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 11949 transitions. [2020-12-22 10:27:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:27:20,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:20,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:20,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:27:20,706 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:20,706 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:27:20,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:20,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140188904] [2020-12-22 10:27:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:20,791 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 10:27:20,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140188904] [2020-12-22 10:27:20,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:20,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:20,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146868826] [2020-12-22 10:27:20,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:20,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:20,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:20,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:20,793 INFO L87 Difference]: Start difference. First operand 7815 states and 11949 transitions. Second operand 3 states. [2020-12-22 10:27:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:21,558 INFO L93 Difference]: Finished difference Result 18219 states and 27919 transitions. [2020-12-22 10:27:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:21,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:27:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:21,586 INFO L225 Difference]: With dead ends: 18219 [2020-12-22 10:27:21,586 INFO L226 Difference]: Without dead ends: 12729 [2020-12-22 10:27:21,596 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 10:27:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12729 states. [2020-12-22 10:27:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12729 to 12727. [2020-12-22 10:27:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12727 states. [2020-12-22 10:27:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12727 states to 12727 states and 19357 transitions. [2020-12-22 10:27:22,417 INFO L78 Accepts]: Start accepts. Automaton has 12727 states and 19357 transitions. Word has length 108 [2020-12-22 10:27:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:22,418 INFO L481 AbstractCegarLoop]: Abstraction has 12727 states and 19357 transitions. [2020-12-22 10:27:22,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 12727 states and 19357 transitions. [2020-12-22 10:27:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:27:22,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:22,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:22,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:27:22,420 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:27:22,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:22,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25755558] [2020-12-22 10:27:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:22,503 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 10:27:22,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25755558] [2020-12-22 10:27:22,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:22,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:22,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790477715] [2020-12-22 10:27:22,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:22,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:22,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:22,511 INFO L87 Difference]: Start difference. First operand 12727 states and 19357 transitions. Second operand 3 states. [2020-12-22 10:27:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:24,080 INFO L93 Difference]: Finished difference Result 32379 states and 49183 transitions. [2020-12-22 10:27:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:24,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:27:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:24,128 INFO L225 Difference]: With dead ends: 32379 [2020-12-22 10:27:24,128 INFO L226 Difference]: Without dead ends: 21977 [2020-12-22 10:27:24,145 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 10:27:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21977 states. [2020-12-22 10:27:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21977 to 21975. [2020-12-22 10:27:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21975 states. [2020-12-22 10:27:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21975 states to 21975 states and 33117 transitions. [2020-12-22 10:27:25,788 INFO L78 Accepts]: Start accepts. Automaton has 21975 states and 33117 transitions. Word has length 108 [2020-12-22 10:27:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:25,788 INFO L481 AbstractCegarLoop]: Abstraction has 21975 states and 33117 transitions. [2020-12-22 10:27:25,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 21975 states and 33117 transitions. [2020-12-22 10:27:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:27:25,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:25,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:25,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:27:25,790 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:27:25,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:25,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742408214] [2020-12-22 10:27:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:25,877 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 10:27:25,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742408214] [2020-12-22 10:27:25,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:25,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:25,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39370283] [2020-12-22 10:27:25,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:27:25,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:27:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:27:25,880 INFO L87 Difference]: Start difference. First operand 21975 states and 33117 transitions. Second operand 3 states. [2020-12-22 10:27:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:28,087 INFO L93 Difference]: Finished difference Result 58971 states and 88543 transitions. [2020-12-22 10:27:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:27:28,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:27:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:28,170 INFO L225 Difference]: With dead ends: 58971 [2020-12-22 10:27:28,171 INFO L226 Difference]: Without dead ends: 39321 [2020-12-22 10:27:28,196 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 10:27:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39321 states. [2020-12-22 10:27:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39321 to 39319. [2020-12-22 10:27:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39319 states. [2020-12-22 10:27:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39319 states to 39319 states and 58525 transitions. [2020-12-22 10:27:30,645 INFO L78 Accepts]: Start accepts. Automaton has 39319 states and 58525 transitions. Word has length 108 [2020-12-22 10:27:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:30,646 INFO L481 AbstractCegarLoop]: Abstraction has 39319 states and 58525 transitions. [2020-12-22 10:27:30,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:27:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 39319 states and 58525 transitions. [2020-12-22 10:27:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:27:30,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:30,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:30,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:27:30,648 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:27:30,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:30,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025416313] [2020-12-22 10:27:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:30,798 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 10:27:30,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025416313] [2020-12-22 10:27:30,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:30,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:27:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475211967] [2020-12-22 10:27:30,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:27:30,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:27:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:27:30,800 INFO L87 Difference]: Start difference. First operand 39319 states and 58525 transitions. Second operand 8 states. [2020-12-22 10:27:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:35,054 INFO L93 Difference]: Finished difference Result 70974 states and 104590 transitions. [2020-12-22 10:27:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:27:35,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:27:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:35,148 INFO L225 Difference]: With dead ends: 70974 [2020-12-22 10:27:35,149 INFO L226 Difference]: Without dead ends: 70972 [2020-12-22 10:27:35,165 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 10:27:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70972 states. [2020-12-22 10:27:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70972 to 40855. [2020-12-22 10:27:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40855 states. [2020-12-22 10:27:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40855 states to 40855 states and 59933 transitions. [2020-12-22 10:27:38,261 INFO L78 Accepts]: Start accepts. Automaton has 40855 states and 59933 transitions. Word has length 109 [2020-12-22 10:27:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:38,262 INFO L481 AbstractCegarLoop]: Abstraction has 40855 states and 59933 transitions. [2020-12-22 10:27:38,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:27:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 40855 states and 59933 transitions. [2020-12-22 10:27:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 10:27:38,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:38,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:27:38,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:27:38,271 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:38,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1016370227, now seen corresponding path program 1 times [2020-12-22 10:27:38,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:38,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568372565] [2020-12-22 10:27:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:27:38,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568372565] [2020-12-22 10:27:38,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:38,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:27:38,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457435562] [2020-12-22 10:27:38,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:27:38,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:27:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:27:38,459 INFO L87 Difference]: Start difference. First operand 40855 states and 59933 transitions. Second operand 4 states. [2020-12-22 10:27:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:27:48,570 INFO L93 Difference]: Finished difference Result 44649 states and 66038 transitions. [2020-12-22 10:27:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:27:48,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 10:27:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:27:48,612 INFO L225 Difference]: With dead ends: 44649 [2020-12-22 10:27:48,612 INFO L226 Difference]: Without dead ends: 42357 [2020-12-22 10:27:48,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:27:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42357 states. [2020-12-22 10:27:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42357 to 42357. [2020-12-22 10:27:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42357 states. [2020-12-22 10:27:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42357 states to 42357 states and 61518 transitions. [2020-12-22 10:27:51,352 INFO L78 Accepts]: Start accepts. Automaton has 42357 states and 61518 transitions. Word has length 138 [2020-12-22 10:27:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:27:51,353 INFO L481 AbstractCegarLoop]: Abstraction has 42357 states and 61518 transitions. [2020-12-22 10:27:51,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:27:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 42357 states and 61518 transitions. [2020-12-22 10:27:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:27:51,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:27:51,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 10:27:51,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:27:51,378 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:27:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:27:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash 949310851, now seen corresponding path program 1 times [2020-12-22 10:27:51,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:27:51,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340065479] [2020-12-22 10:27:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:27:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:27:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:27:51,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340065479] [2020-12-22 10:27:51,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:27:51,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:27:51,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159343462] [2020-12-22 10:27:51,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:27:51,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:27:51,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:27:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:27:51,601 INFO L87 Difference]: Start difference. First operand 42357 states and 61518 transitions. Second operand 10 states. [2020-12-22 10:28:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:09,950 INFO L93 Difference]: Finished difference Result 358023 states and 523543 transitions. [2020-12-22 10:28:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:09,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:10,604 INFO L225 Difference]: With dead ends: 358023 [2020-12-22 10:28:10,604 INFO L226 Difference]: Without dead ends: 319493 [2020-12-22 10:28:10,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319493 states. [2020-12-22 10:28:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319493 to 80885. [2020-12-22 10:28:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80885 states. [2020-12-22 10:28:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80885 states to 80885 states and 117582 transitions. [2020-12-22 10:28:18,146 INFO L78 Accepts]: Start accepts. Automaton has 80885 states and 117582 transitions. Word has length 148 [2020-12-22 10:28:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:18,147 INFO L481 AbstractCegarLoop]: Abstraction has 80885 states and 117582 transitions. [2020-12-22 10:28:18,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 80885 states and 117582 transitions. [2020-12-22 10:28:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:18,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:18,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:18,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:28:18,172 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash 978833069, now seen corresponding path program 1 times [2020-12-22 10:28:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:18,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304923261] [2020-12-22 10:28:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:28:18,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304923261] [2020-12-22 10:28:18,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:18,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:18,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091943505] [2020-12-22 10:28:18,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:18,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:18,576 INFO L87 Difference]: Start difference. First operand 80885 states and 117582 transitions. Second operand 10 states. [2020-12-22 10:28:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:41,629 INFO L93 Difference]: Finished difference Result 396551 states and 579607 transitions. [2020-12-22 10:28:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:41,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:28:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:42,351 INFO L225 Difference]: With dead ends: 396551 [2020-12-22 10:28:42,352 INFO L226 Difference]: Without dead ends: 358021 [2020-12-22 10:28:42,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358021 states. [2020-12-22 10:28:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358021 to 138741. [2020-12-22 10:28:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138741 states. [2020-12-22 10:28:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138741 states to 138741 states and 201358 transitions. [2020-12-22 10:28:54,787 INFO L78 Accepts]: Start accepts. Automaton has 138741 states and 201358 transitions. Word has length 148 [2020-12-22 10:28:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:54,787 INFO L481 AbstractCegarLoop]: Abstraction has 138741 states and 201358 transitions. [2020-12-22 10:28:54,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 138741 states and 201358 transitions. [2020-12-22 10:28:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:28:54,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:54,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:28:54,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:28:54,816 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:54,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:54,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1252520781, now seen corresponding path program 1 times [2020-12-22 10:28:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:54,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916689999] [2020-12-22 10:28:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:28:55,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916689999] [2020-12-22 10:28:55,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:55,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:28:55,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883857120] [2020-12-22 10:28:55,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:55,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:55,294 INFO L87 Difference]: Start difference. First operand 138741 states and 201358 transitions. Second operand 10 states. [2020-12-22 10:29:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:23,199 INFO L93 Difference]: Finished difference Result 435079 states and 635671 transitions. [2020-12-22 10:29:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:29:23,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:29:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:23,919 INFO L225 Difference]: With dead ends: 435079 [2020-12-22 10:29:23,920 INFO L226 Difference]: Without dead ends: 396549 [2020-12-22 10:29:24,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396549 states. [2020-12-22 10:29:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396549 to 177269. [2020-12-22 10:29:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177269 states. [2020-12-22 10:29:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177269 states to 177269 states and 257422 transitions. [2020-12-22 10:29:39,984 INFO L78 Accepts]: Start accepts. Automaton has 177269 states and 257422 transitions. Word has length 148 [2020-12-22 10:29:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:39,985 INFO L481 AbstractCegarLoop]: Abstraction has 177269 states and 257422 transitions. [2020-12-22 10:29:39,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:29:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 177269 states and 257422 transitions. [2020-12-22 10:29:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:29:40,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:40,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:29:40,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:29:40,019 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:40,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1223374867, now seen corresponding path program 1 times [2020-12-22 10:29:40,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:40,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205164944] [2020-12-22 10:29:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:29:40,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205164944] [2020-12-22 10:29:40,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:29:40,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:29:40,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174022375] [2020-12-22 10:29:40,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:29:40,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:40,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:29:40,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:29:40,250 INFO L87 Difference]: Start difference. First operand 177269 states and 257422 transitions. Second operand 10 states. [2020-12-22 10:30:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:15,965 INFO L93 Difference]: Finished difference Result 473607 states and 691735 transitions. [2020-12-22 10:30:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:30:15,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:30:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:16,992 INFO L225 Difference]: With dead ends: 473607 [2020-12-22 10:30:16,992 INFO L226 Difference]: Without dead ends: 435077 [2020-12-22 10:30:17,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435077 states.