/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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:08:45,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:08:45,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:08:45,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:08:45,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:08:45,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:08:45,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:08:45,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:08:45,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:08:45,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:08:45,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:08:45,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:08:45,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:08:45,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:08:45,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:08:45,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:08:45,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:08:45,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:08:45,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:08:45,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:08:45,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:08:45,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:08:45,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:08:45,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:08:45,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:08:45,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:08:45,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:08:45,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:08:45,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:08:45,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:08:45,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:08:45,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:08:45,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:08:45,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:08:45,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:08:45,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:08:45,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:08:45,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:08:45,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:08:45,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:08:45,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:08:45,774 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:08:45,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:08:45,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:08:45,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:08:45,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:08:45,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:08:45,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:08:45,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:08:45,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:08:45,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:08:45,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:08:45,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:08:45,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:08:45,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:08:45,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:08:45,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:08:45,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:08:45,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:08:45,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:08:45,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:08:45,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:08:45,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:08:46,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:08:46,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:08:46,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:08:46,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:08:46,253 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:08:46,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:08:46,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bd3b437/c2c39b0e2065443593b835a21a9f6591/FLAGbd1b9fbe0 [2020-12-22 10:08:47,389 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:08:47,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:08:47,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bd3b437/c2c39b0e2065443593b835a21a9f6591/FLAGbd1b9fbe0 [2020-12-22 10:08:47,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bd3b437/c2c39b0e2065443593b835a21a9f6591 [2020-12-22 10:08:47,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:08:47,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:08:47,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:08:47,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:08:47,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:08:47,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:47" (1/1) ... [2020-12-22 10:08:47,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea397bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:47, skipping insertion in model container [2020-12-22 10:08:47,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:47" (1/1) ... [2020-12-22 10:08:47,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:08:48,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:08:48,555 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[15688,15701] [2020-12-22 10:08:48,616 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[22506,22519] [2020-12-22 10:08:49,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:08:49,691 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:08:49,783 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[15688,15701] [2020-12-22 10:08:49,802 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[22506,22519] [2020-12-22 10:08:50,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:08:50,615 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:08:50,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50 WrapperNode [2020-12-22 10:08:50,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:08:50,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:08:50,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:08:50,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:08:50,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:50,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:08:51,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:08:51,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:08:51,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:08:51,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (1/1) ... [2020-12-22 10:08:51,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:08:51,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:08:51,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:08:51,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:08:51,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (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 10:08:51,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:08:51,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:08:51,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:08:51,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:08:57,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:08:57,422 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:08:57,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:57 BoogieIcfgContainer [2020-12-22 10:08:57,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:08:57,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:08:57,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:08:57,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:08:57,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:08:47" (1/3) ... [2020-12-22 10:08:57,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153c6d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:57, skipping insertion in model container [2020-12-22 10:08:57,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:50" (2/3) ... [2020-12-22 10:08:57,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153c6d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:57, skipping insertion in model container [2020-12-22 10:08:57,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:57" (3/3) ... [2020-12-22 10:08:57,436 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 10:08:57,445 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:08:57,453 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:08:57,476 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:08:57,514 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:08:57,514 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:08:57,515 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:08:57,515 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:08:57,515 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:08:57,515 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:08:57,515 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:08:57,515 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:08:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states. [2020-12-22 10:08:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:08:57,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:57,562 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] [2020-12-22 10:08:57,562 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:08:57,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:57,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706385376] [2020-12-22 10:08:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:57,911 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 10:08:57,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706385376] [2020-12-22 10:08:57,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:57,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:08:57,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196999351] [2020-12-22 10:08:57,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:08:57,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:57,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:08:57,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:08:57,942 INFO L87 Difference]: Start difference. First operand 925 states. Second operand 2 states. [2020-12-22 10:08:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:58,037 INFO L93 Difference]: Finished difference Result 1802 states and 3414 transitions. [2020-12-22 10:08:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:08:58,039 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:08:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:58,067 INFO L225 Difference]: With dead ends: 1802 [2020-12-22 10:08:58,067 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:08:58,076 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 10:08:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:08:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:08:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:08:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1619 transitions. [2020-12-22 10:08:58,228 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1619 transitions. Word has length 38 [2020-12-22 10:08:58,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:58,232 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1619 transitions. [2020-12-22 10:08:58,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:08:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1619 transitions. [2020-12-22 10:08:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:08:58,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:58,236 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] [2020-12-22 10:08:58,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:08:58,237 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:08:58,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:58,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984061679] [2020-12-22 10:08:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:58,404 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 10:08:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984061679] [2020-12-22 10:08:58,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:58,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:08:58,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436663190] [2020-12-22 10:08:58,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:08:58,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:08:58,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:08:58,409 INFO L87 Difference]: Start difference. First operand 859 states and 1619 transitions. Second operand 5 states. [2020-12-22 10:08:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:08:58,573 INFO L93 Difference]: Finished difference Result 922 states and 1717 transitions. [2020-12-22 10:08:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:08:58,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:08:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:08:58,580 INFO L225 Difference]: With dead ends: 922 [2020-12-22 10:08:58,580 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:08:58,583 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 10:08:58,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:08:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:08:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:08:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1579 transitions. [2020-12-22 10:08:58,612 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1579 transitions. Word has length 38 [2020-12-22 10:08:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:08:58,612 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1579 transitions. [2020-12-22 10:08:58,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:08:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1579 transitions. [2020-12-22 10:08:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:08:58,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:08:58,623 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] [2020-12-22 10:08:58,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:08:58,623 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:08:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:08:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash -649760773, now seen corresponding path program 1 times [2020-12-22 10:08:58,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:08:58,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069427315] [2020-12-22 10:08:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:08:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:08:58,853 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 10:08:58,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069427315] [2020-12-22 10:08:58,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:08:58,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:08:58,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273299401] [2020-12-22 10:08:58,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:08:58,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:08:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:08:58,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:08:58,870 INFO L87 Difference]: Start difference. First operand 859 states and 1579 transitions. Second operand 3 states. [2020-12-22 10:09:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:05,103 INFO L93 Difference]: Finished difference Result 2363 states and 4452 transitions. [2020-12-22 10:09:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:05,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 10:09:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:05,115 INFO L225 Difference]: With dead ends: 2363 [2020-12-22 10:09:05,115 INFO L226 Difference]: Without dead ends: 1610 [2020-12-22 10:09:05,117 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 10:09:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2020-12-22 10:09:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2020-12-22 10:09:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2020-12-22 10:09:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2558 transitions. [2020-12-22 10:09:05,178 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2558 transitions. Word has length 61 [2020-12-22 10:09:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:05,179 INFO L481 AbstractCegarLoop]: Abstraction has 1610 states and 2558 transitions. [2020-12-22 10:09:05,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2558 transitions. [2020-12-22 10:09:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:09:05,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:05,181 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] [2020-12-22 10:09:05,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:09:05,182 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:05,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:09:05,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:05,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58989967] [2020-12-22 10:09:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:05,333 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 10:09:05,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58989967] [2020-12-22 10:09:05,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:05,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:05,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428061368] [2020-12-22 10:09:05,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:05,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:05,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:05,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:05,336 INFO L87 Difference]: Start difference. First operand 1610 states and 2558 transitions. Second operand 3 states. [2020-12-22 10:09:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:05,395 INFO L93 Difference]: Finished difference Result 1722 states and 2736 transitions. [2020-12-22 10:09:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:05,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:09:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:05,409 INFO L225 Difference]: With dead ends: 1722 [2020-12-22 10:09:05,409 INFO L226 Difference]: Without dead ends: 1663 [2020-12-22 10:09:05,411 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 10:09:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2020-12-22 10:09:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1661. [2020-12-22 10:09:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2020-12-22 10:09:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2640 transitions. [2020-12-22 10:09:05,467 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2640 transitions. Word has length 77 [2020-12-22 10:09:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:05,467 INFO L481 AbstractCegarLoop]: Abstraction has 1661 states and 2640 transitions. [2020-12-22 10:09:05,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2640 transitions. [2020-12-22 10:09:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:09:05,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:05,470 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] [2020-12-22 10:09:05,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:09:05,471 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:09:05,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:05,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136345722] [2020-12-22 10:09:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:05,716 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 10:09:05,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136345722] [2020-12-22 10:09:05,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:05,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864024566] [2020-12-22 10:09:05,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:05,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:05,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:05,721 INFO L87 Difference]: Start difference. First operand 1661 states and 2640 transitions. Second operand 3 states. [2020-12-22 10:09:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:05,767 INFO L93 Difference]: Finished difference Result 1869 states and 2972 transitions. [2020-12-22 10:09:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:05,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:09:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:05,778 INFO L225 Difference]: With dead ends: 1869 [2020-12-22 10:09:05,779 INFO L226 Difference]: Without dead ends: 1759 [2020-12-22 10:09:05,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2020-12-22 10:09:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1757. [2020-12-22 10:09:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1757 states. [2020-12-22 10:09:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2793 transitions. [2020-12-22 10:09:05,842 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2793 transitions. Word has length 77 [2020-12-22 10:09:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:05,844 INFO L481 AbstractCegarLoop]: Abstraction has 1757 states and 2793 transitions. [2020-12-22 10:09:05,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2793 transitions. [2020-12-22 10:09:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:09:05,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:05,845 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] [2020-12-22 10:09:05,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:09:05,846 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:09:05,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:05,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970493121] [2020-12-22 10:09:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:06,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970493121] [2020-12-22 10:09:06,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:06,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:06,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193190906] [2020-12-22 10:09:06,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:06,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:06,014 INFO L87 Difference]: Start difference. First operand 1757 states and 2793 transitions. Second operand 8 states. [2020-12-22 10:09:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:06,479 INFO L93 Difference]: Finished difference Result 4229 states and 6741 transitions. [2020-12-22 10:09:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:09:06,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:09:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:06,506 INFO L225 Difference]: With dead ends: 4229 [2020-12-22 10:09:06,506 INFO L226 Difference]: Without dead ends: 4023 [2020-12-22 10:09:06,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:09:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2020-12-22 10:09:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 1961. [2020-12-22 10:09:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1961 states. [2020-12-22 10:09:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3113 transitions. [2020-12-22 10:09:06,603 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3113 transitions. Word has length 77 [2020-12-22 10:09:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:06,605 INFO L481 AbstractCegarLoop]: Abstraction has 1961 states and 3113 transitions. [2020-12-22 10:09:06,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3113 transitions. [2020-12-22 10:09:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:06,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:06,606 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] [2020-12-22 10:09:06,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:09:06,607 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:09:06,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:06,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007089861] [2020-12-22 10:09:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:06,743 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 10:09:06,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007089861] [2020-12-22 10:09:06,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:06,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:06,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246571895] [2020-12-22 10:09:06,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:06,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:06,746 INFO L87 Difference]: Start difference. First operand 1961 states and 3113 transitions. Second operand 3 states. [2020-12-22 10:09:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:06,815 INFO L93 Difference]: Finished difference Result 2569 states and 4073 transitions. [2020-12-22 10:09:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:06,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:06,827 INFO L225 Difference]: With dead ends: 2569 [2020-12-22 10:09:06,828 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 10:09:06,831 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 10:09:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 10:09:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2157. [2020-12-22 10:09:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-12-22 10:09:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3417 transitions. [2020-12-22 10:09:06,914 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3417 transitions. Word has length 79 [2020-12-22 10:09:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:06,914 INFO L481 AbstractCegarLoop]: Abstraction has 2157 states and 3417 transitions. [2020-12-22 10:09:06,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3417 transitions. [2020-12-22 10:09:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:06,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:06,921 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] [2020-12-22 10:09:06,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:09:06,922 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:06,922 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:09:06,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:06,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997751085] [2020-12-22 10:09:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:07,208 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 10:09:07,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997751085] [2020-12-22 10:09:07,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:07,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:07,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671758667] [2020-12-22 10:09:07,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:07,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:07,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:07,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:07,210 INFO L87 Difference]: Start difference. First operand 2157 states and 3417 transitions. Second operand 8 states. [2020-12-22 10:09:07,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:07,596 INFO L93 Difference]: Finished difference Result 2763 states and 4369 transitions. [2020-12-22 10:09:07,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:07,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:09:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:07,608 INFO L225 Difference]: With dead ends: 2763 [2020-12-22 10:09:07,608 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 10:09:07,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:09:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 10:09:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2157. [2020-12-22 10:09:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-12-22 10:09:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3411 transitions. [2020-12-22 10:09:07,684 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3411 transitions. Word has length 79 [2020-12-22 10:09:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:07,685 INFO L481 AbstractCegarLoop]: Abstraction has 2157 states and 3411 transitions. [2020-12-22 10:09:07,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3411 transitions. [2020-12-22 10:09:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:07,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:07,686 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] [2020-12-22 10:09:07,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:09:07,688 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:07,689 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:09:07,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:07,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847476213] [2020-12-22 10:09:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:07,890 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 10:09:07,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847476213] [2020-12-22 10:09:07,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:07,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:07,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934224903] [2020-12-22 10:09:07,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:07,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:07,895 INFO L87 Difference]: Start difference. First operand 2157 states and 3411 transitions. Second operand 3 states. [2020-12-22 10:09:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:07,999 INFO L93 Difference]: Finished difference Result 3293 states and 5181 transitions. [2020-12-22 10:09:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:07,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:08,013 INFO L225 Difference]: With dead ends: 3293 [2020-12-22 10:09:08,014 INFO L226 Difference]: Without dead ends: 2689 [2020-12-22 10:09:08,016 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 10:09:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2020-12-22 10:09:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2687. [2020-12-22 10:09:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2687 states. [2020-12-22 10:09:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4223 transitions. [2020-12-22 10:09:08,120 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4223 transitions. Word has length 79 [2020-12-22 10:09:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:08,121 INFO L481 AbstractCegarLoop]: Abstraction has 2687 states and 4223 transitions. [2020-12-22 10:09:08,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4223 transitions. [2020-12-22 10:09:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:08,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:08,122 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] [2020-12-22 10:09:08,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:09:08,122 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:09:08,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:08,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630609271] [2020-12-22 10:09:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:08,195 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 10:09:08,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630609271] [2020-12-22 10:09:08,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:08,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:08,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244019804] [2020-12-22 10:09:08,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:08,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:08,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:08,200 INFO L87 Difference]: Start difference. First operand 2687 states and 4223 transitions. Second operand 3 states. [2020-12-22 10:09:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:08,369 INFO L93 Difference]: Finished difference Result 4811 states and 7497 transitions. [2020-12-22 10:09:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:08,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:08,390 INFO L225 Difference]: With dead ends: 4811 [2020-12-22 10:09:08,390 INFO L226 Difference]: Without dead ends: 3677 [2020-12-22 10:09:08,395 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 10:09:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2020-12-22 10:09:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3675. [2020-12-22 10:09:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3675 states. [2020-12-22 10:09:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5715 transitions. [2020-12-22 10:09:08,582 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5715 transitions. Word has length 79 [2020-12-22 10:09:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:08,583 INFO L481 AbstractCegarLoop]: Abstraction has 3675 states and 5715 transitions. [2020-12-22 10:09:08,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5715 transitions. [2020-12-22 10:09:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:08,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:08,584 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] [2020-12-22 10:09:08,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:09:08,585 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:09:08,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:08,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397368805] [2020-12-22 10:09:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:08,648 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 10:09:08,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397368805] [2020-12-22 10:09:08,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:08,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:08,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550732885] [2020-12-22 10:09:08,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:08,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:08,652 INFO L87 Difference]: Start difference. First operand 3675 states and 5715 transitions. Second operand 3 states. [2020-12-22 10:09:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:08,914 INFO L93 Difference]: Finished difference Result 7631 states and 11733 transitions. [2020-12-22 10:09:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:08,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:08,963 INFO L225 Difference]: With dead ends: 7631 [2020-12-22 10:09:08,963 INFO L226 Difference]: Without dead ends: 5509 [2020-12-22 10:09:08,969 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 10:09:08,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5509 states. [2020-12-22 10:09:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5509 to 5507. [2020-12-22 10:09:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5507 states. [2020-12-22 10:09:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 8435 transitions. [2020-12-22 10:09:09,309 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 8435 transitions. Word has length 79 [2020-12-22 10:09:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:09,309 INFO L481 AbstractCegarLoop]: Abstraction has 5507 states and 8435 transitions. [2020-12-22 10:09:09,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 8435 transitions. [2020-12-22 10:09:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:09,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:09,311 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] [2020-12-22 10:09:09,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:09:09,312 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:09:09,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:09,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459109779] [2020-12-22 10:09:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:09,374 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 10:09:09,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459109779] [2020-12-22 10:09:09,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:09,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:09,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291735834] [2020-12-22 10:09:09,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:09,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:09,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:09,379 INFO L87 Difference]: Start difference. First operand 5507 states and 8435 transitions. Second operand 3 states. [2020-12-22 10:09:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:09,892 INFO L93 Difference]: Finished difference Result 12839 states and 19413 transitions. [2020-12-22 10:09:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:09,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:09,914 INFO L225 Difference]: With dead ends: 12839 [2020-12-22 10:09:09,914 INFO L226 Difference]: Without dead ends: 8885 [2020-12-22 10:09:09,923 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 10:09:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8885 states. [2020-12-22 10:09:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8885 to 8883. [2020-12-22 10:09:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-12-22 10:09:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 13347 transitions. [2020-12-22 10:09:10,432 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 13347 transitions. Word has length 79 [2020-12-22 10:09:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:10,432 INFO L481 AbstractCegarLoop]: Abstraction has 8883 states and 13347 transitions. [2020-12-22 10:09:10,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 13347 transitions. [2020-12-22 10:09:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:09:10,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:10,434 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] [2020-12-22 10:09:10,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:09:10,434 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:10,435 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:09:10,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:10,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795996879] [2020-12-22 10:09:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:10,578 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 10:09:10,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795996879] [2020-12-22 10:09:10,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:10,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:10,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640261283] [2020-12-22 10:09:10,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:10,586 INFO L87 Difference]: Start difference. First operand 8883 states and 13347 transitions. Second operand 8 states. [2020-12-22 10:09:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:11,813 INFO L93 Difference]: Finished difference Result 15218 states and 22490 transitions. [2020-12-22 10:09:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:09:11,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:09:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:11,852 INFO L225 Difference]: With dead ends: 15218 [2020-12-22 10:09:11,852 INFO L226 Difference]: Without dead ends: 15216 [2020-12-22 10:09:11,858 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 10:09:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15216 states. [2020-12-22 10:09:12,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15216 to 9267. [2020-12-22 10:09:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9267 states. [2020-12-22 10:09:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 13699 transitions. [2020-12-22 10:09:12,646 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 13699 transitions. Word has length 80 [2020-12-22 10:09:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:12,647 INFO L481 AbstractCegarLoop]: Abstraction has 9267 states and 13699 transitions. [2020-12-22 10:09:12,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 13699 transitions. [2020-12-22 10:09:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:12,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:12,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:12,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:09:12,656 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1535674975, now seen corresponding path program 1 times [2020-12-22 10:09:12,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:12,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834894922] [2020-12-22 10:09:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:09:12,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834894922] [2020-12-22 10:09:12,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:12,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:12,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278649846] [2020-12-22 10:09:12,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:12,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:12,833 INFO L87 Difference]: Start difference. First operand 9267 states and 13699 transitions. Second operand 8 states. [2020-12-22 10:09:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:15,330 INFO L93 Difference]: Finished difference Result 57089 states and 83226 transitions. [2020-12-22 10:09:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:15,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:15,441 INFO L225 Difference]: With dead ends: 57089 [2020-12-22 10:09:15,441 INFO L226 Difference]: Without dead ends: 49375 [2020-12-22 10:09:15,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49375 states. [2020-12-22 10:09:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49375 to 16979. [2020-12-22 10:09:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16979 states. [2020-12-22 10:09:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 24835 transitions. [2020-12-22 10:09:16,813 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 24835 transitions. Word has length 111 [2020-12-22 10:09:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:16,813 INFO L481 AbstractCegarLoop]: Abstraction has 16979 states and 24835 transitions. [2020-12-22 10:09:16,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 24835 transitions. [2020-12-22 10:09:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:16,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:16,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:16,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:09:16,823 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1506152757, now seen corresponding path program 1 times [2020-12-22 10:09:16,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:16,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693114143] [2020-12-22 10:09:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:09:16,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693114143] [2020-12-22 10:09:16,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:16,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472973135] [2020-12-22 10:09:16,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:16,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:16,971 INFO L87 Difference]: Start difference. First operand 16979 states and 24835 transitions. Second operand 8 states. [2020-12-22 10:09:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:20,172 INFO L93 Difference]: Finished difference Result 64801 states and 94362 transitions. [2020-12-22 10:09:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:20,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:20,294 INFO L225 Difference]: With dead ends: 64801 [2020-12-22 10:09:20,295 INFO L226 Difference]: Without dead ends: 57087 [2020-12-22 10:09:20,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57087 states. [2020-12-22 10:09:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57087 to 28563. [2020-12-22 10:09:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28563 states. [2020-12-22 10:09:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28563 states to 28563 states and 41459 transitions. [2020-12-22 10:09:22,353 INFO L78 Accepts]: Start accepts. Automaton has 28563 states and 41459 transitions. Word has length 111 [2020-12-22 10:09:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:22,354 INFO L481 AbstractCegarLoop]: Abstraction has 28563 states and 41459 transitions. [2020-12-22 10:09:22,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 28563 states and 41459 transitions. [2020-12-22 10:09:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:22,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:22,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:22,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:09:22,365 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1232465045, now seen corresponding path program 1 times [2020-12-22 10:09:22,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:22,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387025116] [2020-12-22 10:09:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:09:22,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387025116] [2020-12-22 10:09:22,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:22,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:22,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438628450] [2020-12-22 10:09:22,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:22,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:22,541 INFO L87 Difference]: Start difference. First operand 28563 states and 41459 transitions. Second operand 8 states. [2020-12-22 10:09:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:26,573 INFO L93 Difference]: Finished difference Result 72513 states and 105498 transitions. [2020-12-22 10:09:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:26,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:26,678 INFO L225 Difference]: With dead ends: 72513 [2020-12-22 10:09:26,678 INFO L226 Difference]: Without dead ends: 64799 [2020-12-22 10:09:26,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64799 states. [2020-12-22 10:09:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64799 to 36275. [2020-12-22 10:09:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36275 states. [2020-12-22 10:09:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36275 states to 36275 states and 52595 transitions. [2020-12-22 10:09:29,351 INFO L78 Accepts]: Start accepts. Automaton has 36275 states and 52595 transitions. Word has length 111 [2020-12-22 10:09:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:29,352 INFO L481 AbstractCegarLoop]: Abstraction has 36275 states and 52595 transitions. [2020-12-22 10:09:29,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 36275 states and 52595 transitions. [2020-12-22 10:09:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:29,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:29,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:29,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:09:29,364 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash 586606603, now seen corresponding path program 1 times [2020-12-22 10:09:29,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:29,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021770623] [2020-12-22 10:09:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:29,501 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 10:09:29,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021770623] [2020-12-22 10:09:29,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:29,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:29,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915230171] [2020-12-22 10:09:29,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:29,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:29,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:29,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:29,503 INFO L87 Difference]: Start difference. First operand 36275 states and 52595 transitions. Second operand 8 states. [2020-12-22 10:09:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:33,706 INFO L93 Difference]: Finished difference Result 80225 states and 116634 transitions. [2020-12-22 10:09:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:33,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:33,819 INFO L225 Difference]: With dead ends: 80225 [2020-12-22 10:09:33,819 INFO L226 Difference]: Without dead ends: 72511 [2020-12-22 10:09:33,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72511 states. [2020-12-22 10:09:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72511 to 43987. [2020-12-22 10:09:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43987 states. [2020-12-22 10:09:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43987 states to 43987 states and 63731 transitions. [2020-12-22 10:09:37,067 INFO L78 Accepts]: Start accepts. Automaton has 43987 states and 63731 transitions. Word has length 111 [2020-12-22 10:09:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:37,068 INFO L481 AbstractCegarLoop]: Abstraction has 43987 states and 63731 transitions. [2020-12-22 10:09:37,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 43987 states and 63731 transitions. [2020-12-22 10:09:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:37,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:37,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:37,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:09:37,080 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:37,081 INFO L82 PathProgramCache]: Analyzing trace with hash 766012587, now seen corresponding path program 1 times [2020-12-22 10:09:37,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:37,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120874840] [2020-12-22 10:09:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:09:37,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120874840] [2020-12-22 10:09:37,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:37,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:37,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699320325] [2020-12-22 10:09:37,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:37,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:37,224 INFO L87 Difference]: Start difference. First operand 43987 states and 63731 transitions. Second operand 8 states. [2020-12-22 10:09:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:42,656 INFO L93 Difference]: Finished difference Result 87937 states and 127770 transitions. [2020-12-22 10:09:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:42,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:42,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:42,745 INFO L225 Difference]: With dead ends: 87937 [2020-12-22 10:09:42,746 INFO L226 Difference]: Without dead ends: 80223 [2020-12-22 10:09:42,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80223 states. [2020-12-22 10:09:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80223 to 51699. [2020-12-22 10:09:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51699 states. [2020-12-22 10:09:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51699 states to 51699 states and 74867 transitions. [2020-12-22 10:09:46,711 INFO L78 Accepts]: Start accepts. Automaton has 51699 states and 74867 transitions. Word has length 111 [2020-12-22 10:09:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:46,711 INFO L481 AbstractCegarLoop]: Abstraction has 51699 states and 74867 transitions. [2020-12-22 10:09:46,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 51699 states and 74867 transitions. [2020-12-22 10:09:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:46,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:46,725 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:46,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:09:46,725 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash -545390527, now seen corresponding path program 1 times [2020-12-22 10:09:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:46,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545267029] [2020-12-22 10:09:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:09:46,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545267029] [2020-12-22 10:09:46,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:46,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:46,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528528632] [2020-12-22 10:09:46,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:46,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:46,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:46,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:46,925 INFO L87 Difference]: Start difference. First operand 51699 states and 74867 transitions. Second operand 8 states. [2020-12-22 10:09:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:52,855 INFO L93 Difference]: Finished difference Result 90977 states and 132186 transitions. [2020-12-22 10:09:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:52,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:52,940 INFO L225 Difference]: With dead ends: 90977 [2020-12-22 10:09:52,940 INFO L226 Difference]: Without dead ends: 85599 [2020-12-22 10:09:52,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85599 states. [2020-12-22 10:09:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85599 to 57075. [2020-12-22 10:09:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57075 states. [2020-12-22 10:09:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57075 states to 57075 states and 82675 transitions. [2020-12-22 10:09:57,252 INFO L78 Accepts]: Start accepts. Automaton has 57075 states and 82675 transitions. Word has length 111 [2020-12-22 10:09:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:57,253 INFO L481 AbstractCegarLoop]: Abstraction has 57075 states and 82675 transitions. [2020-12-22 10:09:57,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 57075 states and 82675 transitions. [2020-12-22 10:09:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:09:57,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:57,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:57,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:09:57,264 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:57,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1181155843, now seen corresponding path program 1 times [2020-12-22 10:09:57,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:57,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365730276] [2020-12-22 10:09:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:57,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365730276] [2020-12-22 10:09:57,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:57,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:57,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042542164] [2020-12-22 10:09:57,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:57,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:57,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:57,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:57,364 INFO L87 Difference]: Start difference. First operand 57075 states and 82675 transitions. Second operand 3 states. [2020-12-22 10:10:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:01,490 INFO L93 Difference]: Finished difference Result 112599 states and 162885 transitions. [2020-12-22 10:10:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:01,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:01,551 INFO L225 Difference]: With dead ends: 112599 [2020-12-22 10:10:01,551 INFO L226 Difference]: Without dead ends: 57077 [2020-12-22 10:10:01,589 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 10:10:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57077 states. [2020-12-22 10:10:05,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57077 to 57075. [2020-12-22 10:10:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57075 states. [2020-12-22 10:10:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57075 states to 57075 states and 81987 transitions. [2020-12-22 10:10:05,945 INFO L78 Accepts]: Start accepts. Automaton has 57075 states and 81987 transitions. Word has length 112 [2020-12-22 10:10:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:05,946 INFO L481 AbstractCegarLoop]: Abstraction has 57075 states and 81987 transitions. [2020-12-22 10:10:05,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 57075 states and 81987 transitions. [2020-12-22 10:10:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:05,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:05,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:05,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:10:05,955 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:05,955 INFO L82 PathProgramCache]: Analyzing trace with hash -734589639, now seen corresponding path program 1 times [2020-12-22 10:10:05,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:05,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94589082] [2020-12-22 10:10:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94589082] [2020-12-22 10:10:06,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:06,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:06,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946071887] [2020-12-22 10:10:06,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:06,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:06,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:06,065 INFO L87 Difference]: Start difference. First operand 57075 states and 81987 transitions. Second operand 3 states. [2020-12-22 10:10:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:08,118 INFO L93 Difference]: Finished difference Result 84839 states and 121749 transitions. [2020-12-22 10:10:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:08,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:08,153 INFO L225 Difference]: With dead ends: 84839 [2020-12-22 10:10:08,153 INFO L226 Difference]: Without dead ends: 29317 [2020-12-22 10:10:08,191 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 10:10:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29317 states. [2020-12-22 10:10:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29317 to 29315. [2020-12-22 10:10:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29315 states. [2020-12-22 10:10:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29315 states to 29315 states and 41883 transitions. [2020-12-22 10:10:10,671 INFO L78 Accepts]: Start accepts. Automaton has 29315 states and 41883 transitions. Word has length 112 [2020-12-22 10:10:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:10,671 INFO L481 AbstractCegarLoop]: Abstraction has 29315 states and 41883 transitions. [2020-12-22 10:10:10,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 29315 states and 41883 transitions. [2020-12-22 10:10:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:10,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:10,675 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] [2020-12-22 10:10:10,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:10:10,675 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1644766063, now seen corresponding path program 1 times [2020-12-22 10:10:10,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:10,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519680888] [2020-12-22 10:10:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:10,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519680888] [2020-12-22 10:10:10,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:10,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:10,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548573815] [2020-12-22 10:10:10,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:10,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:10,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:10,758 INFO L87 Difference]: Start difference. First operand 29315 states and 41883 transitions. Second operand 3 states. [2020-12-22 10:10:11,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:11,836 INFO L93 Difference]: Finished difference Result 43199 states and 61593 transitions. [2020-12-22 10:10:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:11,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:11,859 INFO L225 Difference]: With dead ends: 43199 [2020-12-22 10:10:11,859 INFO L226 Difference]: Without dead ends: 15437 [2020-12-22 10:10:11,874 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 10:10:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15437 states. [2020-12-22 10:10:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15437 to 15435. [2020-12-22 10:10:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15435 states. [2020-12-22 10:10:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15435 states to 15435 states and 22003 transitions. [2020-12-22 10:10:12,973 INFO L78 Accepts]: Start accepts. Automaton has 15435 states and 22003 transitions. Word has length 112 [2020-12-22 10:10:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:12,973 INFO L481 AbstractCegarLoop]: Abstraction has 15435 states and 22003 transitions. [2020-12-22 10:10:12,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 15435 states and 22003 transitions. [2020-12-22 10:10:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:12,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:12,976 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] [2020-12-22 10:10:12,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:10:12,976 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:12,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1063598939, now seen corresponding path program 1 times [2020-12-22 10:10:12,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:12,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090596586] [2020-12-22 10:10:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:13,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090596586] [2020-12-22 10:10:13,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:13,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:13,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913042940] [2020-12-22 10:10:13,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:13,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:13,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:13,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:13,058 INFO L87 Difference]: Start difference. First operand 15435 states and 22003 transitions. Second operand 3 states. [2020-12-22 10:10:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:13,831 INFO L93 Difference]: Finished difference Result 22379 states and 31773 transitions. [2020-12-22 10:10:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:13,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:13,842 INFO L225 Difference]: With dead ends: 22379 [2020-12-22 10:10:13,842 INFO L226 Difference]: Without dead ends: 8497 [2020-12-22 10:10:13,851 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 10:10:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2020-12-22 10:10:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 8495. [2020-12-22 10:10:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8495 states. [2020-12-22 10:10:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8495 states to 8495 states and 12149 transitions. [2020-12-22 10:10:14,437 INFO L78 Accepts]: Start accepts. Automaton has 8495 states and 12149 transitions. Word has length 112 [2020-12-22 10:10:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:14,437 INFO L481 AbstractCegarLoop]: Abstraction has 8495 states and 12149 transitions. [2020-12-22 10:10:14,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8495 states and 12149 transitions. [2020-12-22 10:10:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:14,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:14,439 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:10:14,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:10:14,439 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:14,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:14,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1150717733, now seen corresponding path program 1 times [2020-12-22 10:10:14,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:14,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326987507] [2020-12-22 10:10:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:14,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326987507] [2020-12-22 10:10:14,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439164048] [2020-12-22 10:10:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:10:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:10:15,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:10:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:10:15,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:15,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:10:15,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830978319] [2020-12-22 10:10:15,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:10:15,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:10:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:10:15,590 INFO L87 Difference]: Start difference. First operand 8495 states and 12149 transitions. Second operand 16 states. [2020-12-22 10:10:18,793 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:10:18,989 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 10:10:19,441 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:10:19,732 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 10:10:23,373 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:10:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:24,842 INFO L93 Difference]: Finished difference Result 54691 states and 75506 transitions. [2020-12-22 10:10:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 10:10:24,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-12-22 10:10:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:25,003 INFO L225 Difference]: With dead ends: 54691 [2020-12-22 10:10:25,003 INFO L226 Difference]: Without dead ends: 47749 [2020-12-22 10:10:25,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=944, Invalid=4606, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 10:10:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47749 states. [2020-12-22 10:10:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47749 to 30957. [2020-12-22 10:10:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30957 states. [2020-12-22 10:10:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30957 states to 30957 states and 42759 transitions. [2020-12-22 10:10:28,772 INFO L78 Accepts]: Start accepts. Automaton has 30957 states and 42759 transitions. Word has length 112 [2020-12-22 10:10:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:28,772 INFO L481 AbstractCegarLoop]: Abstraction has 30957 states and 42759 transitions. [2020-12-22 10:10:28,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:10:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 30957 states and 42759 transitions. [2020-12-22 10:10:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:10:28,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:28,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:28,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:10:28,993 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:28,994 INFO L82 PathProgramCache]: Analyzing trace with hash 192689075, now seen corresponding path program 1 times [2020-12-22 10:10:28,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:28,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89879418] [2020-12-22 10:10:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:29,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89879418] [2020-12-22 10:10:29,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070789610] [2020-12-22 10:10:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:10:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:29,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:10:29,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:10:29,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:10:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:30,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:30,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 10:10:30,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882220204] [2020-12-22 10:10:30,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:10:30,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:10:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:10:30,085 INFO L87 Difference]: Start difference. First operand 30957 states and 42759 transitions. Second operand 17 states. [2020-12-22 10:10:43,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:43,139 INFO L93 Difference]: Finished difference Result 128991 states and 175054 transitions. [2020-12-22 10:10:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:10:43,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2020-12-22 10:10:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:43,277 INFO L225 Difference]: With dead ends: 128991 [2020-12-22 10:10:43,277 INFO L226 Difference]: Without dead ends: 107722 [2020-12-22 10:10:43,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:10:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107722 states. [2020-12-22 10:10:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107722 to 63099. [2020-12-22 10:10:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63099 states. [2020-12-22 10:10:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63099 states to 63099 states and 86446 transitions. [2020-12-22 10:10:50,397 INFO L78 Accepts]: Start accepts. Automaton has 63099 states and 86446 transitions. Word has length 113 [2020-12-22 10:10:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:50,397 INFO L481 AbstractCegarLoop]: Abstraction has 63099 states and 86446 transitions. [2020-12-22 10:10:50,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:10:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 63099 states and 86446 transitions. [2020-12-22 10:10:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:10:50,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:50,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:50,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:10:50,608 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2123021299, now seen corresponding path program 1 times [2020-12-22 10:10:50,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:50,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163465664] [2020-12-22 10:10:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:51,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163465664] [2020-12-22 10:10:51,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438787458] [2020-12-22 10:10:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:10:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:51,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:10:51,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:10:51,449 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:10:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:10:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527218941] [2020-12-22 10:10:51,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:10:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:10:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:10:51,794 INFO L87 Difference]: Start difference. First operand 63099 states and 86446 transitions. Second operand 22 states. [2020-12-22 10:10:51,922 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:52,383 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:54,175 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:54,861 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:10:56,390 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:10:58,439 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:10:58,853 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:00,722 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:00,877 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:11:01,138 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 10:11:01,345 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:11:01,525 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:11:01,671 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:11:01,810 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:11:01,971 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:11:02,097 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 10:11:03,064 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:11:03,257 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:03,464 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:11:03,776 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:04,954 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:05,596 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-22 10:11:05,776 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 10:11:06,048 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-22 10:11:06,242 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-12-22 10:11:06,524 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 10:11:24,859 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:46,753 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:46,889 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:11:48,780 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:48,930 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:11:49,190 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:11:51,177 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46