/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:10:36,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:10:36,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:10:36,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:10:36,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:10:36,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:10:36,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:10:37,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:10:37,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:10:37,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:10:37,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:10:37,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:10:37,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:10:37,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:10:37,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:10:37,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:10:37,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:10:37,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:10:37,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:10:37,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:10:37,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:10:37,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:10:37,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:10:37,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:10:37,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:10:37,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:10:37,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:10:37,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:10:37,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:10:37,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:10:37,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:10:37,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:10:37,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:10:37,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:10:37,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:10:37,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:10:37,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:10:37,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:10:37,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:10:37,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:10:37,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:10:37,097 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:10:37,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:10:37,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:10:37,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:10:37,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:10:37,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:10:37,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:10:37,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:10:37,099 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:10:37,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:10:37,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:10:37,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:10:37,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:10:37,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:10:37,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:10:37,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:10:37,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:10:37,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:10:37,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:10:37,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:10:37,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:10:37,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:10:37,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:10:37,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:10:37,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:10:37,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:10:37,565 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:10:37,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c [2020-12-22 10:10:37,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cfd7a602/7f46977e63cc4803b51c098f06f0a1e5/FLAG8343311cd [2020-12-22 10:10:38,592 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:10:38,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c [2020-12-22 10:10:38,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cfd7a602/7f46977e63cc4803b51c098f06f0a1e5/FLAG8343311cd [2020-12-22 10:10:39,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cfd7a602/7f46977e63cc4803b51c098f06f0a1e5 [2020-12-22 10:10:39,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:10:39,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:10:39,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:10:39,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:10:39,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:10:39,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:10:39" (1/1) ... [2020-12-22 10:10:39,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de1ddc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:39, skipping insertion in model container [2020-12-22 10:10:39,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:10:39" (1/1) ... [2020-12-22 10:10:39,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:10:39,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:10:39,656 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c[20581,20594] [2020-12-22 10:10:39,777 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c[27274,27287] [2020-12-22 10:10:40,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:10:40,814 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:10:40,889 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c[20581,20594] [2020-12-22 10:10:40,902 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c[27274,27287] [2020-12-22 10:10:41,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:10:41,673 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:10:41,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41 WrapperNode [2020-12-22 10:10:41,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:10:41,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:10:41,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:10:41,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:10:41,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:41,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:10:42,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:10:42,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:10:42,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:10:42,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (1/1) ... [2020-12-22 10:10:42,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:10:42,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:10:42,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:10:42,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:10:42,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (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 10:10:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:10:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:10:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:10:42,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:10:48,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:10:48,131 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:10:48,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:10:48 BoogieIcfgContainer [2020-12-22 10:10:48,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:10:48,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:10:48,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:10:48,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:10:48,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:10:39" (1/3) ... [2020-12-22 10:10:48,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642b0ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:10:48, skipping insertion in model container [2020-12-22 10:10:48,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:10:41" (2/3) ... [2020-12-22 10:10:48,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642b0ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:10:48, skipping insertion in model container [2020-12-22 10:10:48,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:10:48" (3/3) ... [2020-12-22 10:10:48,149 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals+Problem12_label05.c [2020-12-22 10:10:48,156 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:10:48,162 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:10:48,184 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:10:48,241 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:10:48,245 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:10:48,246 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:10:48,246 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:10:48,246 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:10:48,246 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:10:48,246 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:10:48,246 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:10:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states. [2020-12-22 10:10:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:10:48,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:48,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:48,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:48,316 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:10:48,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:48,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836660178] [2020-12-22 10:10:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:48,669 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 10:10:48,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836660178] [2020-12-22 10:10:48,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:48,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:10:48,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458280429] [2020-12-22 10:10:48,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:10:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:48,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:10:48,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:10:48,694 INFO L87 Difference]: Start difference. First operand 944 states. Second operand 2 states. [2020-12-22 10:10:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:48,819 INFO L93 Difference]: Finished difference Result 1832 states and 3464 transitions. [2020-12-22 10:10:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:10:48,825 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:10:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:48,855 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:10:48,855 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:10:48,864 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 10:10:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:10:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:10:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:10:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1653 transitions. [2020-12-22 10:10:48,981 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1653 transitions. Word has length 42 [2020-12-22 10:10:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:48,982 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1653 transitions. [2020-12-22 10:10:48,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:10:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1653 transitions. [2020-12-22 10:10:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:10:48,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:48,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:48,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:10:48,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:10:48,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:48,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819503299] [2020-12-22 10:10:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:49,110 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 10:10:49,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819503299] [2020-12-22 10:10:49,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:49,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:10:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10282327] [2020-12-22 10:10:49,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:10:49,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:10:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:10:49,116 INFO L87 Difference]: Start difference. First operand 878 states and 1653 transitions. Second operand 5 states. [2020-12-22 10:10:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:49,293 INFO L93 Difference]: Finished difference Result 950 states and 1765 transitions. [2020-12-22 10:10:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:10:49,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:10:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:49,303 INFO L225 Difference]: With dead ends: 950 [2020-12-22 10:10:49,303 INFO L226 Difference]: Without dead ends: 878 [2020-12-22 10:10:49,304 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 10:10:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2020-12-22 10:10:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2020-12-22 10:10:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-12-22 10:10:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1603 transitions. [2020-12-22 10:10:49,349 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1603 transitions. Word has length 42 [2020-12-22 10:10:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:49,349 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1603 transitions. [2020-12-22 10:10:49,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:10:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1603 transitions. [2020-12-22 10:10:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:10:49,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:49,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:49,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:10:49,360 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash -537240347, now seen corresponding path program 1 times [2020-12-22 10:10:49,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:49,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255828753] [2020-12-22 10:10:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:49,605 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 10:10:49,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255828753] [2020-12-22 10:10:49,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:49,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:49,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674445511] [2020-12-22 10:10:49,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:10:49,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:10:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:10:49,614 INFO L87 Difference]: Start difference. First operand 878 states and 1603 transitions. Second operand 4 states. [2020-12-22 10:11:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:01,185 INFO L93 Difference]: Finished difference Result 3133 states and 5912 transitions. [2020-12-22 10:11:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:11:01,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 10:11:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:01,201 INFO L225 Difference]: With dead ends: 3133 [2020-12-22 10:11:01,202 INFO L226 Difference]: Without dead ends: 2380 [2020-12-22 10:11:01,204 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 10:11:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2020-12-22 10:11:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2020-12-22 10:11:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2020-12-22 10:11:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3729 transitions. [2020-12-22 10:11:01,322 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3729 transitions. Word has length 60 [2020-12-22 10:11:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:01,323 INFO L481 AbstractCegarLoop]: Abstraction has 2380 states and 3729 transitions. [2020-12-22 10:11:01,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:11:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3729 transitions. [2020-12-22 10:11:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:01,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:01,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:01,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:11:01,329 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:11:01,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:01,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750738023] [2020-12-22 10:11:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:01,484 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 10:11:01,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750738023] [2020-12-22 10:11:01,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:01,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:01,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003454727] [2020-12-22 10:11:01,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:01,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:01,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:01,487 INFO L87 Difference]: Start difference. First operand 2380 states and 3729 transitions. Second operand 3 states. [2020-12-22 10:11:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:01,540 INFO L93 Difference]: Finished difference Result 2510 states and 3935 transitions. [2020-12-22 10:11:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:01,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:01,556 INFO L225 Difference]: With dead ends: 2510 [2020-12-22 10:11:01,556 INFO L226 Difference]: Without dead ends: 2442 [2020-12-22 10:11:01,558 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 10:11:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2020-12-22 10:11:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2020-12-22 10:11:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2440 states. [2020-12-22 10:11:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3825 transitions. [2020-12-22 10:11:01,623 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3825 transitions. Word has length 91 [2020-12-22 10:11:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:01,624 INFO L481 AbstractCegarLoop]: Abstraction has 2440 states and 3825 transitions. [2020-12-22 10:11:01,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3825 transitions. [2020-12-22 10:11:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:01,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:01,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:01,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:11:01,628 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:11:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:01,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97126110] [2020-12-22 10:11:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:01,838 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 10:11:01,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97126110] [2020-12-22 10:11:01,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:01,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:01,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423821567] [2020-12-22 10:11:01,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:01,843 INFO L87 Difference]: Start difference. First operand 2440 states and 3825 transitions. Second operand 3 states. [2020-12-22 10:11:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:01,908 INFO L93 Difference]: Finished difference Result 2684 states and 4213 transitions. [2020-12-22 10:11:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:01,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:01,925 INFO L225 Difference]: With dead ends: 2684 [2020-12-22 10:11:01,926 INFO L226 Difference]: Without dead ends: 2556 [2020-12-22 10:11:01,928 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 10:11:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-12-22 10:11:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2554. [2020-12-22 10:11:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-12-22 10:11:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 4006 transitions. [2020-12-22 10:11:01,999 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 4006 transitions. Word has length 91 [2020-12-22 10:11:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:02,000 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 4006 transitions. [2020-12-22 10:11:02,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 4006 transitions. [2020-12-22 10:11:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:02,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:02,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:02,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:11:02,002 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:11:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:02,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268845577] [2020-12-22 10:11:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:02,114 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 10:11:02,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268845577] [2020-12-22 10:11:02,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:02,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:02,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012341651] [2020-12-22 10:11:02,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:02,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:02,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:02,117 INFO L87 Difference]: Start difference. First operand 2554 states and 4006 transitions. Second operand 3 states. [2020-12-22 10:11:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:02,177 INFO L93 Difference]: Finished difference Result 3014 states and 4736 transitions. [2020-12-22 10:11:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:02,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:02,194 INFO L225 Difference]: With dead ends: 3014 [2020-12-22 10:11:02,194 INFO L226 Difference]: Without dead ends: 2772 [2020-12-22 10:11:02,196 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 10:11:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2020-12-22 10:11:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2770. [2020-12-22 10:11:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-12-22 10:11:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 4346 transitions. [2020-12-22 10:11:02,274 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 4346 transitions. Word has length 91 [2020-12-22 10:11:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:02,274 INFO L481 AbstractCegarLoop]: Abstraction has 2770 states and 4346 transitions. [2020-12-22 10:11:02,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 4346 transitions. [2020-12-22 10:11:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:02,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:02,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:02,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:11:02,276 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:11:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:02,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262926985] [2020-12-22 10:11:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:11:02,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262926985] [2020-12-22 10:11:02,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:02,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:02,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407948727] [2020-12-22 10:11:02,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:02,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:02,356 INFO L87 Difference]: Start difference. First operand 2770 states and 4346 transitions. Second operand 3 states. [2020-12-22 10:11:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:02,414 INFO L93 Difference]: Finished difference Result 3638 states and 5716 transitions. [2020-12-22 10:11:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:02,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:02,432 INFO L225 Difference]: With dead ends: 3638 [2020-12-22 10:11:02,432 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 10:11:02,435 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 10:11:02,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 10:11:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3178. [2020-12-22 10:11:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-12-22 10:11:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4982 transitions. [2020-12-22 10:11:02,532 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4982 transitions. Word has length 91 [2020-12-22 10:11:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:02,533 INFO L481 AbstractCegarLoop]: Abstraction has 3178 states and 4982 transitions. [2020-12-22 10:11:02,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4982 transitions. [2020-12-22 10:11:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:02,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:02,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:02,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:11:02,534 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:11:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:02,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953783810] [2020-12-22 10:11:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:02,648 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 10:11:02,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953783810] [2020-12-22 10:11:02,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:02,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:02,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073585922] [2020-12-22 10:11:02,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:02,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:02,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:02,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:02,651 INFO L87 Difference]: Start difference. First operand 3178 states and 4982 transitions. Second operand 3 states. [2020-12-22 10:11:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:02,759 INFO L93 Difference]: Finished difference Result 4814 states and 7544 transitions. [2020-12-22 10:11:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:02,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:02,785 INFO L225 Difference]: With dead ends: 4814 [2020-12-22 10:11:02,785 INFO L226 Difference]: Without dead ends: 3948 [2020-12-22 10:11:02,790 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 10:11:02,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2020-12-22 10:11:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3946. [2020-12-22 10:11:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2020-12-22 10:11:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 6166 transitions. [2020-12-22 10:11:02,988 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 6166 transitions. Word has length 91 [2020-12-22 10:11:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:02,988 INFO L481 AbstractCegarLoop]: Abstraction has 3946 states and 6166 transitions. [2020-12-22 10:11:02,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 6166 transitions. [2020-12-22 10:11:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:02,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:02,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:02,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:11:02,991 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:02,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:11:02,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:03,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404508201] [2020-12-22 10:11:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:03,252 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 10:11:03,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404508201] [2020-12-22 10:11:03,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:03,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:03,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457778055] [2020-12-22 10:11:03,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:03,256 INFO L87 Difference]: Start difference. First operand 3946 states and 6166 transitions. Second operand 9 states. [2020-12-22 10:11:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:04,940 INFO L93 Difference]: Finished difference Result 26822 states and 41796 transitions. [2020-12-22 10:11:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:11:04,941 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:11:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:05,047 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 10:11:05,047 INFO L226 Difference]: Without dead ends: 25188 [2020-12-22 10:11:05,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:11:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25188 states. [2020-12-22 10:11:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25188 to 5578. [2020-12-22 10:11:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5578 states. [2020-12-22 10:11:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 8646 transitions. [2020-12-22 10:11:05,614 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 8646 transitions. Word has length 91 [2020-12-22 10:11:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:05,614 INFO L481 AbstractCegarLoop]: Abstraction has 5578 states and 8646 transitions. [2020-12-22 10:11:05,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 8646 transitions. [2020-12-22 10:11:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:05,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:05,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:05,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:11:05,618 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:11:05,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:05,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918879076] [2020-12-22 10:11:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:05,832 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 10:11:05,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918879076] [2020-12-22 10:11:05,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:05,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:05,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592256739] [2020-12-22 10:11:05,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:05,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:05,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:05,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:05,839 INFO L87 Difference]: Start difference. First operand 5578 states and 8646 transitions. Second operand 3 states. [2020-12-22 10:11:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:06,136 INFO L93 Difference]: Finished difference Result 10400 states and 16058 transitions. [2020-12-22 10:11:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:06,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:06,155 INFO L225 Difference]: With dead ends: 10400 [2020-12-22 10:11:06,155 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:11:06,163 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 10:11:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:11:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:11:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:11:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10984 transitions. [2020-12-22 10:11:06,528 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10984 transitions. Word has length 93 [2020-12-22 10:11:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:06,529 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10984 transitions. [2020-12-22 10:11:06,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10984 transitions. [2020-12-22 10:11:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:06,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:06,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:06,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:11:06,533 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:11:06,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:06,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280159627] [2020-12-22 10:11:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:06,907 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 10:11:06,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280159627] [2020-12-22 10:11:06,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:06,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:06,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69916721] [2020-12-22 10:11:06,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:06,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:06,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:06,912 INFO L87 Difference]: Start difference. First operand 7132 states and 10984 transitions. Second operand 9 states. [2020-12-22 10:11:07,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:07,781 INFO L93 Difference]: Finished difference Result 11952 states and 18346 transitions. [2020-12-22 10:11:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:07,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:11:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:07,801 INFO L225 Difference]: With dead ends: 11952 [2020-12-22 10:11:07,802 INFO L226 Difference]: Without dead ends: 7134 [2020-12-22 10:11:07,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:11:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2020-12-22 10:11:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7132. [2020-12-22 10:11:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7132 states. [2020-12-22 10:11:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 10936 transitions. [2020-12-22 10:11:08,268 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 10936 transitions. Word has length 93 [2020-12-22 10:11:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:08,268 INFO L481 AbstractCegarLoop]: Abstraction has 7132 states and 10936 transitions. [2020-12-22 10:11:08,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 10936 transitions. [2020-12-22 10:11:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:08,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:08,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:08,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:11:08,271 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:08,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:11:08,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:08,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976114222] [2020-12-22 10:11:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:08,359 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 10:11:08,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976114222] [2020-12-22 10:11:08,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:08,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:08,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166724027] [2020-12-22 10:11:08,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:08,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:08,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:08,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:08,361 INFO L87 Difference]: Start difference. First operand 7132 states and 10936 transitions. Second operand 3 states. [2020-12-22 10:11:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:08,944 INFO L93 Difference]: Finished difference Result 16192 states and 24602 transitions. [2020-12-22 10:11:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:08,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:08,972 INFO L225 Difference]: With dead ends: 16192 [2020-12-22 10:11:08,972 INFO L226 Difference]: Without dead ends: 11374 [2020-12-22 10:11:08,982 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 10:11:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11374 states. [2020-12-22 10:11:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11374 to 11372. [2020-12-22 10:11:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11372 states. [2020-12-22 10:11:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 17192 transitions. [2020-12-22 10:11:09,630 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 17192 transitions. Word has length 93 [2020-12-22 10:11:09,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:09,630 INFO L481 AbstractCegarLoop]: Abstraction has 11372 states and 17192 transitions. [2020-12-22 10:11:09,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 17192 transitions. [2020-12-22 10:11:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:09,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:09,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:09,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:11:09,633 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:11:09,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:09,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879374081] [2020-12-22 10:11:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:09,803 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 10:11:09,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879374081] [2020-12-22 10:11:09,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:09,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:09,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607242834] [2020-12-22 10:11:09,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:09,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:09,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:09,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:09,812 INFO L87 Difference]: Start difference. First operand 11372 states and 17192 transitions. Second operand 3 states. [2020-12-22 10:11:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:10,659 INFO L93 Difference]: Finished difference Result 28336 states and 42410 transitions. [2020-12-22 10:11:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:10,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:10,703 INFO L225 Difference]: With dead ends: 28336 [2020-12-22 10:11:10,703 INFO L226 Difference]: Without dead ends: 19278 [2020-12-22 10:11:10,720 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 10:11:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2020-12-22 10:11:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 19276. [2020-12-22 10:11:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19276 states. [2020-12-22 10:11:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19276 states to 19276 states and 28648 transitions. [2020-12-22 10:11:12,241 INFO L78 Accepts]: Start accepts. Automaton has 19276 states and 28648 transitions. Word has length 93 [2020-12-22 10:11:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:12,241 INFO L481 AbstractCegarLoop]: Abstraction has 19276 states and 28648 transitions. [2020-12-22 10:11:12,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 19276 states and 28648 transitions. [2020-12-22 10:11:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:12,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:12,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:12,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:11:12,243 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:11:12,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:12,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864778066] [2020-12-22 10:11:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:12,348 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 10:11:12,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864778066] [2020-12-22 10:11:12,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:12,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:11:12,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042179891] [2020-12-22 10:11:12,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:11:12,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:12,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:11:12,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:11:12,351 INFO L87 Difference]: Start difference. First operand 19276 states and 28648 transitions. Second operand 6 states. [2020-12-22 10:11:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:14,658 INFO L93 Difference]: Finished difference Result 51856 states and 76842 transitions. [2020-12-22 10:11:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:11:14,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:11:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:14,749 INFO L225 Difference]: With dead ends: 51856 [2020-12-22 10:11:14,749 INFO L226 Difference]: Without dead ends: 34894 [2020-12-22 10:11:14,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34894 states. [2020-12-22 10:11:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34894 to 30796. [2020-12-22 10:11:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30796 states. [2020-12-22 10:11:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30796 states to 30796 states and 45544 transitions. [2020-12-22 10:11:16,759 INFO L78 Accepts]: Start accepts. Automaton has 30796 states and 45544 transitions. Word has length 94 [2020-12-22 10:11:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:16,759 INFO L481 AbstractCegarLoop]: Abstraction has 30796 states and 45544 transitions. [2020-12-22 10:11:16,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:11:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 30796 states and 45544 transitions. [2020-12-22 10:11:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:16,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:16,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:16,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:11:16,762 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:16,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:11:16,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:16,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543504605] [2020-12-22 10:11:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:16,883 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 10:11:16,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543504605] [2020-12-22 10:11:16,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:16,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:11:16,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829279809] [2020-12-22 10:11:16,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:11:16,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:11:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:11:16,886 INFO L87 Difference]: Start difference. First operand 30796 states and 45544 transitions. Second operand 6 states. [2020-12-22 10:11:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:18,832 INFO L93 Difference]: Finished difference Result 59278 states and 87465 transitions. [2020-12-22 10:11:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:11:18,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:11:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:18,893 INFO L225 Difference]: With dead ends: 59278 [2020-12-22 10:11:18,893 INFO L226 Difference]: Without dead ends: 30796 [2020-12-22 10:11:18,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30796 states. [2020-12-22 10:11:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30796 to 30796. [2020-12-22 10:11:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30796 states. [2020-12-22 10:11:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30796 states to 30796 states and 45224 transitions. [2020-12-22 10:11:21,040 INFO L78 Accepts]: Start accepts. Automaton has 30796 states and 45224 transitions. Word has length 94 [2020-12-22 10:11:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:21,041 INFO L481 AbstractCegarLoop]: Abstraction has 30796 states and 45224 transitions. [2020-12-22 10:11:21,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:11:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 30796 states and 45224 transitions. [2020-12-22 10:11:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:21,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:21,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:21,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:11:21,042 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:21,043 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:11:21,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:21,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132789117] [2020-12-22 10:11:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:21,202 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 10:11:21,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132789117] [2020-12-22 10:11:21,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:21,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:11:21,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861859778] [2020-12-22 10:11:21,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:11:21,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:21,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:11:21,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:11:21,207 INFO L87 Difference]: Start difference. First operand 30796 states and 45224 transitions. Second operand 8 states. [2020-12-22 10:11:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:25,393 INFO L93 Difference]: Finished difference Result 57839 states and 83922 transitions. [2020-12-22 10:11:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:11:25,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:11:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:25,461 INFO L225 Difference]: With dead ends: 57839 [2020-12-22 10:11:25,461 INFO L226 Difference]: Without dead ends: 57837 [2020-12-22 10:11:25,473 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 10:11:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57837 states. [2020-12-22 10:11:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57837 to 32332. [2020-12-22 10:11:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32332 states. [2020-12-22 10:11:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32332 states to 32332 states and 46696 transitions. [2020-12-22 10:11:27,796 INFO L78 Accepts]: Start accepts. Automaton has 32332 states and 46696 transitions. Word has length 94 [2020-12-22 10:11:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:27,797 INFO L481 AbstractCegarLoop]: Abstraction has 32332 states and 46696 transitions. [2020-12-22 10:11:27,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:11:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 32332 states and 46696 transitions. [2020-12-22 10:11:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:11:27,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:27,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:27,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:11:27,816 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:27,816 INFO L82 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2020-12-22 10:11:27,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:27,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10612159] [2020-12-22 10:11:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:11:28,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10612159] [2020-12-22 10:11:28,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:28,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187558623] [2020-12-22 10:11:28,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:28,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:28,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:28,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:28,027 INFO L87 Difference]: Start difference. First operand 32332 states and 46696 transitions. Second operand 9 states. [2020-12-22 10:11:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:42,040 INFO L93 Difference]: Finished difference Result 252060 states and 361680 transitions. [2020-12-22 10:11:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:42,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:11:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:42,525 INFO L225 Difference]: With dead ends: 252060 [2020-12-22 10:11:42,525 INFO L226 Difference]: Without dead ends: 222042 [2020-12-22 10:11:42,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222042 states. [2020-12-22 10:11:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222042 to 62348. [2020-12-22 10:11:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62348 states. [2020-12-22 10:11:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62348 states to 62348 states and 89448 transitions. [2020-12-22 10:11:48,114 INFO L78 Accepts]: Start accepts. Automaton has 62348 states and 89448 transitions. Word has length 130 [2020-12-22 10:11:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:48,115 INFO L481 AbstractCegarLoop]: Abstraction has 62348 states and 89448 transitions. [2020-12-22 10:11:48,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 62348 states and 89448 transitions. [2020-12-22 10:11:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:11:48,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:48,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:48,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:11:48,137 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1349380685, now seen corresponding path program 1 times [2020-12-22 10:11:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:48,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892078657] [2020-12-22 10:11:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:11:48,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892078657] [2020-12-22 10:11:48,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:48,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:48,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722453742] [2020-12-22 10:11:48,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:48,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:48,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:48,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:48,474 INFO L87 Difference]: Start difference. First operand 62348 states and 89448 transitions. Second operand 9 states. [2020-12-22 10:12:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:05,338 INFO L93 Difference]: Finished difference Result 282076 states and 404432 transitions. [2020-12-22 10:12:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:05,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:12:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:05,864 INFO L225 Difference]: With dead ends: 282076 [2020-12-22 10:12:05,864 INFO L226 Difference]: Without dead ends: 252058 [2020-12-22 10:12:05,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252058 states. [2020-12-22 10:12:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252058 to 107404. [2020-12-22 10:12:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107404 states. [2020-12-22 10:12:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107404 states to 107404 states and 153288 transitions. [2020-12-22 10:12:15,143 INFO L78 Accepts]: Start accepts. Automaton has 107404 states and 153288 transitions. Word has length 130 [2020-12-22 10:12:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:15,144 INFO L481 AbstractCegarLoop]: Abstraction has 107404 states and 153288 transitions. [2020-12-22 10:12:15,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 107404 states and 153288 transitions. [2020-12-22 10:12:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:12:15,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:15,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:15,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:12:15,169 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1476153629, now seen corresponding path program 1 times [2020-12-22 10:12:15,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:15,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917328278] [2020-12-22 10:12:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:12:15,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917328278] [2020-12-22 10:12:15,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:15,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:15,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103293757] [2020-12-22 10:12:15,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:15,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:15,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:15,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:15,403 INFO L87 Difference]: Start difference. First operand 107404 states and 153288 transitions. Second operand 9 states. [2020-12-22 10:12:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:35,947 INFO L93 Difference]: Finished difference Result 312092 states and 447184 transitions. [2020-12-22 10:12:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:35,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 10:12:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:36,572 INFO L225 Difference]: With dead ends: 312092 [2020-12-22 10:12:36,572 INFO L226 Difference]: Without dead ends: 282074 [2020-12-22 10:12:36,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282074 states. [2020-12-22 10:12:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282074 to 137420. [2020-12-22 10:12:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137420 states. [2020-12-22 10:12:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137420 states to 137420 states and 196040 transitions. [2020-12-22 10:12:48,928 INFO L78 Accepts]: Start accepts. Automaton has 137420 states and 196040 transitions. Word has length 130 [2020-12-22 10:12:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:48,928 INFO L481 AbstractCegarLoop]: Abstraction has 137420 states and 196040 transitions. [2020-12-22 10:12:48,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 137420 states and 196040 transitions. [2020-12-22 10:12:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 10:12:48,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:48,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:48,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:12:48,955 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:48,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1583354627, now seen corresponding path program 1 times [2020-12-22 10:12:48,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:48,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695711961] [2020-12-22 10:12:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:12:49,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695711961] [2020-12-22 10:12:49,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:49,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066072282] [2020-12-22 10:12:49,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:49,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:49,470 INFO L87 Difference]: Start difference. First operand 137420 states and 196040 transitions. Second operand 9 states.