/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/systemc/token_ring.08.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:07,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:07,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:08,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:08,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:08,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:08,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:08,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:08,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:08,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:08,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:08,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:10:08,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:10:08,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:10:08,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:10:08,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:10:08,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:10:08,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:10:08,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:10:08,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:10:08,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:10:08,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:10:08,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:10:08,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:10:08,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:10:08,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:08,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:08,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:08,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:08,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:08,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:08,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:08,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:08,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:08,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:08,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:08,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:08,197 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:08,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:08,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:08,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:08,202 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:08,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:08,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:08,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:08,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:08,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:08,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:08,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:08,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:08,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:08,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:08,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:08,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:08,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:08,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:08,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:08,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:08,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:08,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:08,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:08,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:08,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:08,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:08,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:08,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:08,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:08,680 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:08,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2020-12-22 07:10:08,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299a0b3e5/e7c97f57bcb740218b01c514b64fb1ec/FLAG7c13ca088 [2020-12-22 07:10:09,459 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:09,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2020-12-22 07:10:09,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299a0b3e5/e7c97f57bcb740218b01c514b64fb1ec/FLAG7c13ca088 [2020-12-22 07:10:09,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/299a0b3e5/e7c97f57bcb740218b01c514b64fb1ec [2020-12-22 07:10:09,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:09,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:09,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:09,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:09,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:09,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:09" (1/1) ... [2020-12-22 07:10:09,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f72153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:09, skipping insertion in model container [2020-12-22 07:10:09,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:09" (1/1) ... [2020-12-22 07:10:09,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:09,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:10,043 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/systemc/token_ring.08.cil-2.c[366,379] [2020-12-22 07:10:10,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:10,201 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:10,213 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/systemc/token_ring.08.cil-2.c[366,379] [2020-12-22 07:10:10,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:10,314 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:10,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10 WrapperNode [2020-12-22 07:10:10,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:10,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:10,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:10,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:10,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:10,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:10,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:10,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:10,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (1/1) ... [2020-12-22 07:10:10,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:10,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:10,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:10,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:10,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (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 07:10:10,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:10,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:10,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:12,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:12,826 INFO L299 CfgBuilder]: Removed 327 assume(true) statements. [2020-12-22 07:10:12,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:12 BoogieIcfgContainer [2020-12-22 07:10:12,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:12,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:12,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:12,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:12,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:09" (1/3) ... [2020-12-22 07:10:12,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed5df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:12, skipping insertion in model container [2020-12-22 07:10:12,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:10" (2/3) ... [2020-12-22 07:10:12,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed5df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:12, skipping insertion in model container [2020-12-22 07:10:12,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:12" (3/3) ... [2020-12-22 07:10:12,841 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.08.cil-2.c [2020-12-22 07:10:12,849 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:12,857 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:10:12,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:10:12,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:12,915 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:12,915 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:12,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:12,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:12,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:12,916 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:12,916 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states. [2020-12-22 07:10:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:12,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:12,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:12,965 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash -245504410, now seen corresponding path program 1 times [2020-12-22 07:10:12,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:12,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816147325] [2020-12-22 07:10:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:13,303 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 07:10:13,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816147325] [2020-12-22 07:10:13,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:13,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:13,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961046738] [2020-12-22 07:10:13,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:13,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:13,330 INFO L87 Difference]: Start difference. First operand 981 states. Second operand 3 states. [2020-12-22 07:10:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:13,460 INFO L93 Difference]: Finished difference Result 1957 states and 2989 transitions. [2020-12-22 07:10:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:13,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:13,492 INFO L225 Difference]: With dead ends: 1957 [2020-12-22 07:10:13,493 INFO L226 Difference]: Without dead ends: 977 [2020-12-22 07:10:13,502 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 07:10:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2020-12-22 07:10:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2020-12-22 07:10:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-12-22 07:10:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1469 transitions. [2020-12-22 07:10:13,657 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1469 transitions. Word has length 116 [2020-12-22 07:10:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:13,657 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 1469 transitions. [2020-12-22 07:10:13,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1469 transitions. [2020-12-22 07:10:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:13,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:13,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:13,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:13,661 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash -716860760, now seen corresponding path program 1 times [2020-12-22 07:10:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:13,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239268247] [2020-12-22 07:10:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:13,778 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 07:10:13,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239268247] [2020-12-22 07:10:13,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:13,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:13,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440234855] [2020-12-22 07:10:13,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:13,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:13,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:13,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:13,783 INFO L87 Difference]: Start difference. First operand 977 states and 1469 transitions. Second operand 4 states. [2020-12-22 07:10:13,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:13,945 INFO L93 Difference]: Finished difference Result 2743 states and 4111 transitions. [2020-12-22 07:10:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:13,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:13,956 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 07:10:13,956 INFO L226 Difference]: Without dead ends: 1779 [2020-12-22 07:10:13,960 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 07:10:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-12-22 07:10:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1775. [2020-12-22 07:10:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1775 states. [2020-12-22 07:10:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2657 transitions. [2020-12-22 07:10:14,037 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2657 transitions. Word has length 116 [2020-12-22 07:10:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:14,038 INFO L481 AbstractCegarLoop]: Abstraction has 1775 states and 2657 transitions. [2020-12-22 07:10:14,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2657 transitions. [2020-12-22 07:10:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:14,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:14,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:14,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:14,042 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1544712490, now seen corresponding path program 1 times [2020-12-22 07:10:14,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:14,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927758892] [2020-12-22 07:10:14,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:14,235 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 07:10:14,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927758892] [2020-12-22 07:10:14,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:14,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:14,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741294936] [2020-12-22 07:10:14,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:14,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:14,238 INFO L87 Difference]: Start difference. First operand 1775 states and 2657 transitions. Second operand 4 states. [2020-12-22 07:10:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:14,437 INFO L93 Difference]: Finished difference Result 5132 states and 7669 transitions. [2020-12-22 07:10:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:14,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:14,456 INFO L225 Difference]: With dead ends: 5132 [2020-12-22 07:10:14,456 INFO L226 Difference]: Without dead ends: 3372 [2020-12-22 07:10:14,461 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 07:10:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2020-12-22 07:10:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3368. [2020-12-22 07:10:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3368 states. [2020-12-22 07:10:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 5028 transitions. [2020-12-22 07:10:14,662 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 5028 transitions. Word has length 116 [2020-12-22 07:10:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:14,663 INFO L481 AbstractCegarLoop]: Abstraction has 3368 states and 5028 transitions. [2020-12-22 07:10:14,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 5028 transitions. [2020-12-22 07:10:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:14,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:14,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:14,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:14,668 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash -321996184, now seen corresponding path program 1 times [2020-12-22 07:10:14,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:14,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710869595] [2020-12-22 07:10:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:14,784 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 07:10:14,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710869595] [2020-12-22 07:10:14,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:14,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:14,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935891799] [2020-12-22 07:10:14,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:14,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:14,787 INFO L87 Difference]: Start difference. First operand 3368 states and 5028 transitions. Second operand 4 states. [2020-12-22 07:10:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:15,136 INFO L93 Difference]: Finished difference Result 9905 states and 14772 transitions. [2020-12-22 07:10:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:15,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:15,170 INFO L225 Difference]: With dead ends: 9905 [2020-12-22 07:10:15,170 INFO L226 Difference]: Without dead ends: 6553 [2020-12-22 07:10:15,178 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 07:10:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2020-12-22 07:10:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 6549. [2020-12-22 07:10:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6549 states. [2020-12-22 07:10:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 9757 transitions. [2020-12-22 07:10:15,524 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 9757 transitions. Word has length 116 [2020-12-22 07:10:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:15,524 INFO L481 AbstractCegarLoop]: Abstraction has 6549 states and 9757 transitions. [2020-12-22 07:10:15,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 9757 transitions. [2020-12-22 07:10:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:15,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:15,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:15,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:15,531 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:15,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1629138582, now seen corresponding path program 1 times [2020-12-22 07:10:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:15,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634843573] [2020-12-22 07:10:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:15,671 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 07:10:15,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634843573] [2020-12-22 07:10:15,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:15,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:15,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950774060] [2020-12-22 07:10:15,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:15,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:15,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:15,675 INFO L87 Difference]: Start difference. First operand 6549 states and 9757 transitions. Second operand 3 states. [2020-12-22 07:10:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:15,987 INFO L93 Difference]: Finished difference Result 13081 states and 19488 transitions. [2020-12-22 07:10:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:15,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:16,022 INFO L225 Difference]: With dead ends: 13081 [2020-12-22 07:10:16,023 INFO L226 Difference]: Without dead ends: 6549 [2020-12-22 07:10:16,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2020-12-22 07:10:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 6549. [2020-12-22 07:10:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6549 states. [2020-12-22 07:10:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 9731 transitions. [2020-12-22 07:10:16,411 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 9731 transitions. Word has length 116 [2020-12-22 07:10:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:16,411 INFO L481 AbstractCegarLoop]: Abstraction has 6549 states and 9731 transitions. [2020-12-22 07:10:16,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 9731 transitions. [2020-12-22 07:10:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:16,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:16,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:16,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:16,416 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash -241114906, now seen corresponding path program 1 times [2020-12-22 07:10:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:16,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939818605] [2020-12-22 07:10:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:16,510 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 07:10:16,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939818605] [2020-12-22 07:10:16,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:16,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:16,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815047389] [2020-12-22 07:10:16,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:16,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:16,515 INFO L87 Difference]: Start difference. First operand 6549 states and 9731 transitions. Second operand 3 states. [2020-12-22 07:10:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:16,825 INFO L93 Difference]: Finished difference Result 13080 states and 19435 transitions. [2020-12-22 07:10:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:16,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:16,877 INFO L225 Difference]: With dead ends: 13080 [2020-12-22 07:10:16,877 INFO L226 Difference]: Without dead ends: 6549 [2020-12-22 07:10:16,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2020-12-22 07:10:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 6549. [2020-12-22 07:10:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6549 states. [2020-12-22 07:10:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 9705 transitions. [2020-12-22 07:10:17,221 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 9705 transitions. Word has length 116 [2020-12-22 07:10:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:17,221 INFO L481 AbstractCegarLoop]: Abstraction has 6549 states and 9705 transitions. [2020-12-22 07:10:17,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 9705 transitions. [2020-12-22 07:10:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:17,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:17,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:17,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:10:17,225 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1581813270, now seen corresponding path program 1 times [2020-12-22 07:10:17,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:17,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447330491] [2020-12-22 07:10:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:17,319 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 07:10:17,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447330491] [2020-12-22 07:10:17,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:17,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:17,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023407706] [2020-12-22 07:10:17,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:17,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:17,335 INFO L87 Difference]: Start difference. First operand 6549 states and 9705 transitions. Second operand 4 states. [2020-12-22 07:10:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:18,013 INFO L93 Difference]: Finished difference Result 19422 states and 28773 transitions. [2020-12-22 07:10:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:18,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:18,045 INFO L225 Difference]: With dead ends: 19422 [2020-12-22 07:10:18,046 INFO L226 Difference]: Without dead ends: 12892 [2020-12-22 07:10:18,061 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 07:10:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12892 states. [2020-12-22 07:10:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12892 to 12888. [2020-12-22 07:10:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12888 states. [2020-12-22 07:10:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12888 states to 12888 states and 19076 transitions. [2020-12-22 07:10:18,713 INFO L78 Accepts]: Start accepts. Automaton has 12888 states and 19076 transitions. Word has length 116 [2020-12-22 07:10:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:18,714 INFO L481 AbstractCegarLoop]: Abstraction has 12888 states and 19076 transitions. [2020-12-22 07:10:18,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 12888 states and 19076 transitions. [2020-12-22 07:10:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:18,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:18,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:18,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:10:18,718 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:18,719 INFO L82 PathProgramCache]: Analyzing trace with hash 806750760, now seen corresponding path program 1 times [2020-12-22 07:10:18,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:18,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500695110] [2020-12-22 07:10:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:18,770 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 07:10:18,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500695110] [2020-12-22 07:10:18,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:18,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:18,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961615312] [2020-12-22 07:10:18,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:18,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:18,773 INFO L87 Difference]: Start difference. First operand 12888 states and 19076 transitions. Second operand 4 states. [2020-12-22 07:10:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:19,951 INFO L93 Difference]: Finished difference Result 38417 states and 56848 transitions. [2020-12-22 07:10:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:19,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:20,014 INFO L225 Difference]: With dead ends: 38417 [2020-12-22 07:10:20,015 INFO L226 Difference]: Without dead ends: 25549 [2020-12-22 07:10:20,036 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 07:10:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25549 states. [2020-12-22 07:10:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25549 to 25545. [2020-12-22 07:10:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25545 states. [2020-12-22 07:10:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25545 states to 25545 states and 37765 transitions. [2020-12-22 07:10:21,343 INFO L78 Accepts]: Start accepts. Automaton has 25545 states and 37765 transitions. Word has length 116 [2020-12-22 07:10:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:21,344 INFO L481 AbstractCegarLoop]: Abstraction has 25545 states and 37765 transitions. [2020-12-22 07:10:21,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 25545 states and 37765 transitions. [2020-12-22 07:10:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:21,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:21,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:21,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:10:21,353 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:21,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1887145430, now seen corresponding path program 1 times [2020-12-22 07:10:21,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:21,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114479392] [2020-12-22 07:10:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:21,409 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 07:10:21,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114479392] [2020-12-22 07:10:21,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:21,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:21,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272681858] [2020-12-22 07:10:21,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:21,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:21,417 INFO L87 Difference]: Start difference. First operand 25545 states and 37765 transitions. Second operand 4 states. [2020-12-22 07:10:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:23,133 INFO L93 Difference]: Finished difference Result 74306 states and 109905 transitions. [2020-12-22 07:10:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:23,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:23,256 INFO L225 Difference]: With dead ends: 74306 [2020-12-22 07:10:23,257 INFO L226 Difference]: Without dead ends: 48783 [2020-12-22 07:10:23,294 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 07:10:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48783 states. [2020-12-22 07:10:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48783 to 48747. [2020-12-22 07:10:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48747 states. [2020-12-22 07:10:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48747 states to 48747 states and 72072 transitions. [2020-12-22 07:10:25,446 INFO L78 Accepts]: Start accepts. Automaton has 48747 states and 72072 transitions. Word has length 116 [2020-12-22 07:10:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:25,446 INFO L481 AbstractCegarLoop]: Abstraction has 48747 states and 72072 transitions. [2020-12-22 07:10:25,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 48747 states and 72072 transitions. [2020-12-22 07:10:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:25,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:25,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:25,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:10:25,465 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash -535760212, now seen corresponding path program 1 times [2020-12-22 07:10:25,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:25,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848211412] [2020-12-22 07:10:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:25,517 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 07:10:25,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848211412] [2020-12-22 07:10:25,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:25,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:25,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105808222] [2020-12-22 07:10:25,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:25,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:25,522 INFO L87 Difference]: Start difference. First operand 48747 states and 72072 transitions. Second operand 4 states. [2020-12-22 07:10:28,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:28,700 INFO L93 Difference]: Finished difference Result 141828 states and 209812 transitions. [2020-12-22 07:10:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:28,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:28,924 INFO L225 Difference]: With dead ends: 141828 [2020-12-22 07:10:28,925 INFO L226 Difference]: Without dead ends: 93104 [2020-12-22 07:10:28,975 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 07:10:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93104 states. [2020-12-22 07:10:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93104 to 92460. [2020-12-22 07:10:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92460 states. [2020-12-22 07:10:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92460 states to 92460 states and 136489 transitions. [2020-12-22 07:10:32,325 INFO L78 Accepts]: Start accepts. Automaton has 92460 states and 136489 transitions. Word has length 116 [2020-12-22 07:10:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:32,325 INFO L481 AbstractCegarLoop]: Abstraction has 92460 states and 136489 transitions. [2020-12-22 07:10:32,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 92460 states and 136489 transitions. [2020-12-22 07:10:32,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:32,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:32,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:32,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:10:32,349 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:32,350 INFO L82 PathProgramCache]: Analyzing trace with hash 2140232170, now seen corresponding path program 1 times [2020-12-22 07:10:32,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:32,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335298526] [2020-12-22 07:10:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:32,625 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 07:10:32,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335298526] [2020-12-22 07:10:32,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:32,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:32,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366862310] [2020-12-22 07:10:32,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:32,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:32,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:32,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:32,629 INFO L87 Difference]: Start difference. First operand 92460 states and 136489 transitions. Second operand 3 states. [2020-12-22 07:10:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:35,759 INFO L93 Difference]: Finished difference Result 184896 states and 272944 transitions. [2020-12-22 07:10:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:35,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:35,901 INFO L225 Difference]: With dead ends: 184896 [2020-12-22 07:10:35,901 INFO L226 Difference]: Without dead ends: 92460 [2020-12-22 07:10:36,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92460 states. [2020-12-22 07:10:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92460 to 92460. [2020-12-22 07:10:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92460 states. [2020-12-22 07:10:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92460 states to 92460 states and 135077 transitions. [2020-12-22 07:10:39,722 INFO L78 Accepts]: Start accepts. Automaton has 92460 states and 135077 transitions. Word has length 116 [2020-12-22 07:10:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:39,733 INFO L481 AbstractCegarLoop]: Abstraction has 92460 states and 135077 transitions. [2020-12-22 07:10:39,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 92460 states and 135077 transitions. [2020-12-22 07:10:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:39,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:39,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:39,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:10:39,755 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1256723180, now seen corresponding path program 1 times [2020-12-22 07:10:39,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:39,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437063717] [2020-12-22 07:10:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:39,806 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 07:10:39,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437063717] [2020-12-22 07:10:39,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:39,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:39,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031214391] [2020-12-22 07:10:39,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:39,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:39,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:39,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:39,808 INFO L87 Difference]: Start difference. First operand 92460 states and 135077 transitions. Second operand 4 states. [2020-12-22 07:10:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:45,192 INFO L93 Difference]: Finished difference Result 268677 states and 392813 transitions. [2020-12-22 07:10:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:45,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:10:45,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:45,558 INFO L225 Difference]: With dead ends: 268677 [2020-12-22 07:10:45,558 INFO L226 Difference]: Without dead ends: 176242 [2020-12-22 07:10:45,651 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 07:10:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176242 states. [2020-12-22 07:10:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176242 to 176110. [2020-12-22 07:10:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176110 states. [2020-12-22 07:10:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176110 states to 176110 states and 257383 transitions. [2020-12-22 07:10:52,276 INFO L78 Accepts]: Start accepts. Automaton has 176110 states and 257383 transitions. Word has length 116 [2020-12-22 07:10:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:52,277 INFO L481 AbstractCegarLoop]: Abstraction has 176110 states and 257383 transitions. [2020-12-22 07:10:52,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 176110 states and 257383 transitions. [2020-12-22 07:10:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:52,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:52,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:52,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:10:52,301 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1228222890, now seen corresponding path program 1 times [2020-12-22 07:10:52,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:52,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187713879] [2020-12-22 07:10:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:52,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187713879] [2020-12-22 07:10:52,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:52,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:52,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169640992] [2020-12-22 07:10:52,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:52,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:52,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:52,347 INFO L87 Difference]: Start difference. First operand 176110 states and 257383 transitions. Second operand 4 states. [2020-12-22 07:11:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:02,564 INFO L93 Difference]: Finished difference Result 511303 states and 747823 transitions. [2020-12-22 07:11:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:02,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:11:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:03,168 INFO L225 Difference]: With dead ends: 511303 [2020-12-22 07:11:03,168 INFO L226 Difference]: Without dead ends: 335219 [2020-12-22 07:11:03,753 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 07:11:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335219 states. [2020-12-22 07:11:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335219 to 334959. [2020-12-22 07:11:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334959 states. [2020-12-22 07:11:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334959 states to 334959 states and 489704 transitions. [2020-12-22 07:11:16,316 INFO L78 Accepts]: Start accepts. Automaton has 334959 states and 489704 transitions. Word has length 116 [2020-12-22 07:11:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:16,316 INFO L481 AbstractCegarLoop]: Abstraction has 334959 states and 489704 transitions. [2020-12-22 07:11:16,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 334959 states and 489704 transitions. [2020-12-22 07:11:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:11:16,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:16,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:16,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:11:16,387 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash -712359124, now seen corresponding path program 1 times [2020-12-22 07:11:16,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:16,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888213152] [2020-12-22 07:11:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:16,430 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 07:11:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888213152] [2020-12-22 07:11:16,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:16,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:16,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658642941] [2020-12-22 07:11:16,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:16,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:16,432 INFO L87 Difference]: Start difference. First operand 334959 states and 489704 transitions. Second operand 4 states. [2020-12-22 07:11:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:36,972 INFO L93 Difference]: Finished difference Result 971208 states and 1420976 transitions. [2020-12-22 07:11:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:36,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 07:11:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:38,341 INFO L225 Difference]: With dead ends: 971208 [2020-12-22 07:11:38,342 INFO L226 Difference]: Without dead ends: 636276 [2020-12-22 07:11:38,871 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 07:11:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636276 states. [2020-12-22 07:12:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636276 to 635760. [2020-12-22 07:12:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635760 states. [2020-12-22 07:12:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635760 states to 635760 states and 929769 transitions. [2020-12-22 07:12:08,659 INFO L78 Accepts]: Start accepts. Automaton has 635760 states and 929769 transitions. Word has length 116 [2020-12-22 07:12:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:08,674 INFO L481 AbstractCegarLoop]: Abstraction has 635760 states and 929769 transitions. [2020-12-22 07:12:08,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:12:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 635760 states and 929769 transitions. [2020-12-22 07:12:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:12:08,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:08,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:12:08,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:12:08,797 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1164704106, now seen corresponding path program 1 times [2020-12-22 07:12:08,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:08,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348465249] [2020-12-22 07:12:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:08,880 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 07:12:08,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348465249] [2020-12-22 07:12:08,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:08,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:08,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321966563] [2020-12-22 07:12:08,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:08,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:08,884 INFO L87 Difference]: Start difference. First operand 635760 states and 929769 transitions. Second operand 4 states.