/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.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:33:19,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:33:19,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:33:19,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:33:19,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:33:19,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:33:19,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:33:19,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:33:19,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:33:19,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:33:19,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:33:19,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:33:19,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:33:19,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:33:19,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:33:19,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:33:19,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:33:19,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:33:19,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:33:19,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:33:19,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:33:19,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:33:19,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:33:19,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:33:19,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:33:19,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:33:19,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:33:19,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:33:19,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:33:19,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:33:19,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:33:19,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:33:19,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:33:19,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:33:19,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:33:19,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:33:19,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:33:19,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:33:19,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:33:19,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:33:19,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:33:19,761 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:33:19,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:33:19,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:33:19,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:33:19,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:33:19,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:33:19,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:33:19,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:33:19,762 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:33:19,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:33:19,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:33:19,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:33:19,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:33:19,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:33:19,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:33:19,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:33:19,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:33:19,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:33:19,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:33:19,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:33:19,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:33:19,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:33:20,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:33:20,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:33:20,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:33:20,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:33:20,196 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:33:20,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c [2020-12-22 09:33:20,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c7e24d5/94f33b0332ee495db011d7c89d830043/FLAG7e9bc75e4 [2020-12-22 09:33:21,403 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:33:21,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c [2020-12-22 09:33:21,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c7e24d5/94f33b0332ee495db011d7c89d830043/FLAG7e9bc75e4 [2020-12-22 09:33:21,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c7e24d5/94f33b0332ee495db011d7c89d830043 [2020-12-22 09:33:21,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:33:21,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:33:21,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:21,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:33:21,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:33:21,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:21" (1/1) ... [2020-12-22 09:33:21,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2decc40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:21, skipping insertion in model container [2020-12-22 09:33:21,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:21" (1/1) ... [2020-12-22 09:33:21,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:33:22,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:33:22,342 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.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c[6449,6462] [2020-12-22 09:33:22,413 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.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c[13267,13280] [2020-12-22 09:33:23,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:23,480 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:33:23,549 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.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c[6449,6462] [2020-12-22 09:33:23,568 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.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c[13267,13280] [2020-12-22 09:33:24,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:24,338 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:33:24,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24 WrapperNode [2020-12-22 09:33:24,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:24,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:24,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:33:24,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:33:24,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:24,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:24,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:24,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:33:24,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:33:24,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:33:24,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:24,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:24,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:24,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:25,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:25,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:25,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (1/1) ... [2020-12-22 09:33:25,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:33:25,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:33:25,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:33:25,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:33:25,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (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 09:33:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:33:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:33:25,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:33:25,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:33:31,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:33:31,109 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:33:31,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:31 BoogieIcfgContainer [2020-12-22 09:33:31,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:33:31,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:33:31,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:33:31,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:33:31,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:33:21" (1/3) ... [2020-12-22 09:33:31,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bfd58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:31, skipping insertion in model container [2020-12-22 09:33:31,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:24" (2/3) ... [2020-12-22 09:33:31,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bfd58c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:31, skipping insertion in model container [2020-12-22 09:33:31,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:31" (3/3) ... [2020-12-22 09:33:31,122 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label04.c [2020-12-22 09:33:31,128 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:33:31,134 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:33:31,153 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:33:31,187 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:33:31,187 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:33:31,187 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:33:31,187 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:33:31,187 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:33:31,188 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:33:31,188 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:33:31,188 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:33:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:33:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:31,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:31,234 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] [2020-12-22 09:33:31,234 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:33:31,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:31,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043961272] [2020-12-22 09:33:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:31,473 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 09:33:31,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043961272] [2020-12-22 09:33:31,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:31,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:33:31,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836321142] [2020-12-22 09:33:31,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:33:31,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:33:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:33:31,504 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 2 states. [2020-12-22 09:33:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:31,608 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2020-12-22 09:33:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:33:31,609 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:33:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:31,663 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:33:31,663 INFO L226 Difference]: Without dead ends: 812 [2020-12-22 09:33:31,675 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 09:33:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-12-22 09:33:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2020-12-22 09:33:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:33:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2020-12-22 09:33:31,862 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2020-12-22 09:33:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:31,863 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2020-12-22 09:33:31,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:33:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2020-12-22 09:33:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:31,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:31,865 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] [2020-12-22 09:33:31,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:33:31,866 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:33:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:31,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723631575] [2020-12-22 09:33:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:32,074 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 09:33:32,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723631575] [2020-12-22 09:33:32,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:32,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:32,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110147703] [2020-12-22 09:33:32,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:32,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:32,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:32,081 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand 5 states. [2020-12-22 09:33:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:32,198 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2020-12-22 09:33:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:33:32,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:33:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:32,205 INFO L225 Difference]: With dead ends: 888 [2020-12-22 09:33:32,205 INFO L226 Difference]: Without dead ends: 848 [2020-12-22 09:33:32,207 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 09:33:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-12-22 09:33:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2020-12-22 09:33:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:33:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2020-12-22 09:33:32,235 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2020-12-22 09:33:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:32,236 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2020-12-22 09:33:32,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2020-12-22 09:33:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:32,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:32,238 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] [2020-12-22 09:33:32,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:33:32,239 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:33:32,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:32,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732711601] [2020-12-22 09:33:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:32,321 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 09:33:32,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732711601] [2020-12-22 09:33:32,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:32,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423574810] [2020-12-22 09:33:32,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:32,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:32,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:32,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:32,325 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand 3 states. [2020-12-22 09:33:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:32,363 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2020-12-22 09:33:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:32,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:33:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:32,369 INFO L225 Difference]: With dead ends: 878 [2020-12-22 09:33:32,369 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:33:32,370 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 09:33:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:33:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-12-22 09:33:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-12-22 09:33:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2020-12-22 09:33:32,399 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2020-12-22 09:33:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:32,399 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2020-12-22 09:33:32,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2020-12-22 09:33:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:32,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:32,401 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] [2020-12-22 09:33:32,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:33:32,402 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:33:32,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:32,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805965273] [2020-12-22 09:33:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:32,496 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 09:33:32,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805965273] [2020-12-22 09:33:32,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:32,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276983271] [2020-12-22 09:33:32,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:32,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:32,499 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand 5 states. [2020-12-22 09:33:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:32,661 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2020-12-22 09:33:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:33:32,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:33:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:32,669 INFO L225 Difference]: With dead ends: 1224 [2020-12-22 09:33:32,669 INFO L226 Difference]: Without dead ends: 1160 [2020-12-22 09:33:32,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-12-22 09:33:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2020-12-22 09:33:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-12-22 09:33:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2020-12-22 09:33:32,704 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2020-12-22 09:33:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:32,705 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2020-12-22 09:33:32,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2020-12-22 09:33:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:32,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:32,707 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] [2020-12-22 09:33:32,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:33:32,707 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:33:32,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:32,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716787697] [2020-12-22 09:33:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:32,845 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 09:33:32,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716787697] [2020-12-22 09:33:32,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:32,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290351304] [2020-12-22 09:33:32,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:32,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:32,848 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand 3 states. [2020-12-22 09:33:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:32,895 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2020-12-22 09:33:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:32,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:32,902 INFO L225 Difference]: With dead ends: 1089 [2020-12-22 09:33:32,902 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:33:32,903 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 09:33:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:33:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:33:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:33:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2020-12-22 09:33:32,937 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2020-12-22 09:33:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:32,937 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2020-12-22 09:33:32,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2020-12-22 09:33:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:32,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:32,939 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] [2020-12-22 09:33:32,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:33:32,940 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:32,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:33:32,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:32,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263075552] [2020-12-22 09:33:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:33,070 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 09:33:33,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263075552] [2020-12-22 09:33:33,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:33,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:33,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793168855] [2020-12-22 09:33:33,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:33,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:33,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:33,073 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand 5 states. [2020-12-22 09:33:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:33,200 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2020-12-22 09:33:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:33,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:33:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:33,208 INFO L225 Difference]: With dead ends: 1146 [2020-12-22 09:33:33,208 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:33:33,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:33:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:33:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:33:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:33:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2020-12-22 09:33:33,246 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2020-12-22 09:33:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:33,246 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2020-12-22 09:33:33,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2020-12-22 09:33:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:33,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:33,249 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] [2020-12-22 09:33:33,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:33:33,250 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:33,255 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:33:33,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:33,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878303283] [2020-12-22 09:33:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:33,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878303283] [2020-12-22 09:33:33,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:33,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:33,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353897511] [2020-12-22 09:33:33,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:33,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:33,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:33,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:33,349 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand 3 states. [2020-12-22 09:33:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:33,399 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2020-12-22 09:33:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:33,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:33,408 INFO L225 Difference]: With dead ends: 1291 [2020-12-22 09:33:33,408 INFO L226 Difference]: Without dead ends: 1108 [2020-12-22 09:33:33,410 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 09:33:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-12-22 09:33:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2020-12-22 09:33:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-12-22 09:33:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2020-12-22 09:33:33,493 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2020-12-22 09:33:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:33,495 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2020-12-22 09:33:33,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2020-12-22 09:33:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:33,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:33,496 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] [2020-12-22 09:33:33,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:33:33,497 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:33:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:33,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226441147] [2020-12-22 09:33:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:33,574 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 09:33:33,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226441147] [2020-12-22 09:33:33,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:33,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:33,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496274929] [2020-12-22 09:33:33,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:33,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:33,577 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand 3 states. [2020-12-22 09:33:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:33,631 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2020-12-22 09:33:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:33,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:33,639 INFO L225 Difference]: With dead ends: 1690 [2020-12-22 09:33:33,639 INFO L226 Difference]: Without dead ends: 1362 [2020-12-22 09:33:33,640 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 09:33:33,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2020-12-22 09:33:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2020-12-22 09:33:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-12-22 09:33:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2020-12-22 09:33:33,691 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2020-12-22 09:33:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:33,691 INFO L481 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2020-12-22 09:33:33,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2020-12-22 09:33:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:33:33,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:33,692 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] [2020-12-22 09:33:33,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:33:33,692 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:33:33,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:33,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661309007] [2020-12-22 09:33:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:33,822 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 09:33:33,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661309007] [2020-12-22 09:33:33,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:33,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:33,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023962989] [2020-12-22 09:33:33,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:33,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:33,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:33,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:33,826 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand 5 states. [2020-12-22 09:33:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:33,961 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2020-12-22 09:33:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:33:33,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:33:33,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:33,974 INFO L225 Difference]: With dead ends: 1883 [2020-12-22 09:33:33,974 INFO L226 Difference]: Without dead ends: 1881 [2020-12-22 09:33:33,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-12-22 09:33:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2020-12-22 09:33:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:33:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2020-12-22 09:33:34,052 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2020-12-22 09:33:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:34,053 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2020-12-22 09:33:34,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2020-12-22 09:33:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:33:34,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:34,054 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 09:33:34,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:33:34,054 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 254202953, now seen corresponding path program 1 times [2020-12-22 09:33:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:34,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787480363] [2020-12-22 09:33:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:34,206 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 09:33:34,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787480363] [2020-12-22 09:33:34,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:34,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081066043] [2020-12-22 09:33:34,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:33:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:33:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:33:34,212 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand 4 states. [2020-12-22 09:33:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:45,691 INFO L93 Difference]: Finished difference Result 3663 states and 6661 transitions. [2020-12-22 09:33:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:33:45,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:33:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:45,708 INFO L225 Difference]: With dead ends: 3663 [2020-12-22 09:33:45,708 INFO L226 Difference]: Without dead ends: 2910 [2020-12-22 09:33:45,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2020-12-22 09:33:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2020-12-22 09:33:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2910 states. [2020-12-22 09:33:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4328 transitions. [2020-12-22 09:33:45,820 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4328 transitions. Word has length 61 [2020-12-22 09:33:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:45,821 INFO L481 AbstractCegarLoop]: Abstraction has 2910 states and 4328 transitions. [2020-12-22 09:33:45,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:33:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4328 transitions. [2020-12-22 09:33:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:45,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:45,823 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] [2020-12-22 09:33:45,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:33:45,823 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:33:45,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:45,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246017839] [2020-12-22 09:33:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:33:45,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246017839] [2020-12-22 09:33:45,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:45,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:45,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251716551] [2020-12-22 09:33:45,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:45,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:45,901 INFO L87 Difference]: Start difference. First operand 2910 states and 4328 transitions. Second operand 5 states. [2020-12-22 09:33:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:46,151 INFO L93 Difference]: Finished difference Result 4938 states and 7176 transitions. [2020-12-22 09:33:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:46,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:46,173 INFO L225 Difference]: With dead ends: 4938 [2020-12-22 09:33:46,173 INFO L226 Difference]: Without dead ends: 4308 [2020-12-22 09:33:46,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:33:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2020-12-22 09:33:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2020-12-22 09:33:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3538 states. [2020-12-22 09:33:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5204 transitions. [2020-12-22 09:33:46,344 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5204 transitions. Word has length 64 [2020-12-22 09:33:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:46,345 INFO L481 AbstractCegarLoop]: Abstraction has 3538 states and 5204 transitions. [2020-12-22 09:33:46,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5204 transitions. [2020-12-22 09:33:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:46,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:46,347 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] [2020-12-22 09:33:46,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:33:46,347 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:33:46,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:46,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212870496] [2020-12-22 09:33:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:33:46,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212870496] [2020-12-22 09:33:46,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:46,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:46,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980878675] [2020-12-22 09:33:46,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:46,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:46,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:46,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:46,442 INFO L87 Difference]: Start difference. First operand 3538 states and 5204 transitions. Second operand 5 states. [2020-12-22 09:33:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:46,729 INFO L93 Difference]: Finished difference Result 5566 states and 8052 transitions. [2020-12-22 09:33:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:46,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:46,757 INFO L225 Difference]: With dead ends: 5566 [2020-12-22 09:33:46,757 INFO L226 Difference]: Without dead ends: 4936 [2020-12-22 09:33:46,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:33:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2020-12-22 09:33:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2020-12-22 09:33:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4482 states. [2020-12-22 09:33:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6508 transitions. [2020-12-22 09:33:47,069 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6508 transitions. Word has length 64 [2020-12-22 09:33:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:47,069 INFO L481 AbstractCegarLoop]: Abstraction has 4482 states and 6508 transitions. [2020-12-22 09:33:47,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6508 transitions. [2020-12-22 09:33:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:47,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:47,072 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:47,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:33:47,072 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:33:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:47,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867893688] [2020-12-22 09:33:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:47,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867893688] [2020-12-22 09:33:47,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:47,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:47,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722271567] [2020-12-22 09:33:47,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:47,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:47,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:47,162 INFO L87 Difference]: Start difference. First operand 4482 states and 6508 transitions. Second operand 5 states. [2020-12-22 09:33:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:47,473 INFO L93 Difference]: Finished difference Result 5834 states and 8432 transitions. [2020-12-22 09:33:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:47,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:47,516 INFO L225 Difference]: With dead ends: 5834 [2020-12-22 09:33:47,517 INFO L226 Difference]: Without dead ends: 5384 [2020-12-22 09:33:47,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:33:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2020-12-22 09:33:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4930. [2020-12-22 09:33:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2020-12-22 09:33:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7140 transitions. [2020-12-22 09:33:47,792 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7140 transitions. Word has length 64 [2020-12-22 09:33:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:47,792 INFO L481 AbstractCegarLoop]: Abstraction has 4930 states and 7140 transitions. [2020-12-22 09:33:47,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7140 transitions. [2020-12-22 09:33:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:47,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:47,801 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] [2020-12-22 09:33:47,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:33:47,801 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:47,802 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:33:47,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:47,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628962450] [2020-12-22 09:33:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:47,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628962450] [2020-12-22 09:33:47,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:47,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:47,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841398805] [2020-12-22 09:33:47,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:47,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:47,874 INFO L87 Difference]: Start difference. First operand 4930 states and 7140 transitions. Second operand 3 states. [2020-12-22 09:33:48,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:48,084 INFO L93 Difference]: Finished difference Result 7582 states and 10842 transitions. [2020-12-22 09:33:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:48,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:33:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:48,096 INFO L225 Difference]: With dead ends: 7582 [2020-12-22 09:33:48,096 INFO L226 Difference]: Without dead ends: 4932 [2020-12-22 09:33:48,102 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 09:33:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2020-12-22 09:33:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4930. [2020-12-22 09:33:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2020-12-22 09:33:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7090 transitions. [2020-12-22 09:33:48,358 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7090 transitions. Word has length 65 [2020-12-22 09:33:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:48,358 INFO L481 AbstractCegarLoop]: Abstraction has 4930 states and 7090 transitions. [2020-12-22 09:33:48,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7090 transitions. [2020-12-22 09:33:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:48,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:48,360 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] [2020-12-22 09:33:48,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:33:48,361 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:33:48,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:48,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608837418] [2020-12-22 09:33:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:48,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608837418] [2020-12-22 09:33:48,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:48,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322372951] [2020-12-22 09:33:48,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:48,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:48,427 INFO L87 Difference]: Start difference. First operand 4930 states and 7090 transitions. Second operand 3 states. [2020-12-22 09:33:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:48,554 INFO L93 Difference]: Finished difference Result 6258 states and 8917 transitions. [2020-12-22 09:33:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:48,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:33:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:48,564 INFO L225 Difference]: With dead ends: 6258 [2020-12-22 09:33:48,564 INFO L226 Difference]: Without dead ends: 3608 [2020-12-22 09:33:48,571 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 09:33:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2020-12-22 09:33:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3606. [2020-12-22 09:33:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3606 states. [2020-12-22 09:33:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5240 transitions. [2020-12-22 09:33:48,709 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5240 transitions. Word has length 65 [2020-12-22 09:33:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:48,709 INFO L481 AbstractCegarLoop]: Abstraction has 3606 states and 5240 transitions. [2020-12-22 09:33:48,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5240 transitions. [2020-12-22 09:33:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:48,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:48,711 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:48,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:33:48,711 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:48,712 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:33:48,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:48,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256583341] [2020-12-22 09:33:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:48,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256583341] [2020-12-22 09:33:48,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527475493] [2020-12-22 09:33:48,811 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 09:33:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:33:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:49,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:49,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:33:49,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025467062] [2020-12-22 09:33:49,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:33:49,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:33:49,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:33:49,246 INFO L87 Difference]: Start difference. First operand 3606 states and 5240 transitions. Second operand 10 states. [2020-12-22 09:33:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:49,622 INFO L93 Difference]: Finished difference Result 5455 states and 7777 transitions. [2020-12-22 09:33:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:33:49,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:33:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:49,633 INFO L225 Difference]: With dead ends: 5455 [2020-12-22 09:33:49,633 INFO L226 Difference]: Without dead ends: 4445 [2020-12-22 09:33:49,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:33:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4445 states. [2020-12-22 09:33:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4445 to 4412. [2020-12-22 09:33:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4412 states. [2020-12-22 09:33:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 6296 transitions. [2020-12-22 09:33:49,856 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 6296 transitions. Word has length 65 [2020-12-22 09:33:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:49,856 INFO L481 AbstractCegarLoop]: Abstraction has 4412 states and 6296 transitions. [2020-12-22 09:33:49,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:33:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 6296 transitions. [2020-12-22 09:33:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:49,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:49,858 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:50,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:33:50,073 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:33:50,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:50,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737153001] [2020-12-22 09:33:50,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:50,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737153001] [2020-12-22 09:33:50,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690497633] [2020-12-22 09:33:50,309 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 09:33:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:33:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:50,629 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:50,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:50,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:33:50,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415955074] [2020-12-22 09:33:50,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:33:50,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:33:50,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:33:50,939 INFO L87 Difference]: Start difference. First operand 4412 states and 6296 transitions. Second operand 17 states. [2020-12-22 09:33:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:53,138 INFO L93 Difference]: Finished difference Result 11431 states and 15566 transitions. [2020-12-22 09:33:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:33:53,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:33:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:53,164 INFO L225 Difference]: With dead ends: 11431 [2020-12-22 09:33:53,164 INFO L226 Difference]: Without dead ends: 9940 [2020-12-22 09:33:53,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:33:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2020-12-22 09:33:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 6887. [2020-12-22 09:33:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6887 states. [2020-12-22 09:33:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6887 states to 6887 states and 9574 transitions. [2020-12-22 09:33:53,837 INFO L78 Accepts]: Start accepts. Automaton has 6887 states and 9574 transitions. Word has length 66 [2020-12-22 09:33:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:53,837 INFO L481 AbstractCegarLoop]: Abstraction has 6887 states and 9574 transitions. [2020-12-22 09:33:53,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:33:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6887 states and 9574 transitions. [2020-12-22 09:33:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:53,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:53,839 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:54,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:33:54,054 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:33:54,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:54,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027464972] [2020-12-22 09:33:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:54,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027464972] [2020-12-22 09:33:54,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556858336] [2020-12-22 09:33:54,327 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 09:33:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:33:54,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:54,592 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:54,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:54,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:33:54,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665854785] [2020-12-22 09:33:54,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:33:54,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:33:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:33:54,877 INFO L87 Difference]: Start difference. First operand 6887 states and 9574 transitions. Second operand 17 states. [2020-12-22 09:33:57,831 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:33:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:59,879 INFO L93 Difference]: Finished difference Result 30001 states and 40146 transitions. [2020-12-22 09:33:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:33:59,880 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:33:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:59,941 INFO L225 Difference]: With dead ends: 30001 [2020-12-22 09:33:59,941 INFO L226 Difference]: Without dead ends: 25394 [2020-12-22 09:33:59,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:33:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25394 states. [2020-12-22 09:34:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25394 to 12386. [2020-12-22 09:34:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12386 states. [2020-12-22 09:34:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12386 states to 12386 states and 16701 transitions. [2020-12-22 09:34:00,976 INFO L78 Accepts]: Start accepts. Automaton has 12386 states and 16701 transitions. Word has length 66 [2020-12-22 09:34:00,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:00,976 INFO L481 AbstractCegarLoop]: Abstraction has 12386 states and 16701 transitions. [2020-12-22 09:34:00,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12386 states and 16701 transitions. [2020-12-22 09:34:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:00,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:00,979 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:01,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:34:01,194 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:34:01,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:01,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416041057] [2020-12-22 09:34:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:01,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416041057] [2020-12-22 09:34:01,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576845416] [2020-12-22 09:34:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:01,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:34:01,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:01,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:02,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:02,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-12-22 09:34:02,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464157473] [2020-12-22 09:34:02,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:34:02,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:02,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:34:02,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:34:02,150 INFO L87 Difference]: Start difference. First operand 12386 states and 16701 transitions. Second operand 18 states. [2020-12-22 09:34:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:07,169 INFO L93 Difference]: Finished difference Result 55180 states and 72037 transitions. [2020-12-22 09:34:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:34:07,169 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-12-22 09:34:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:07,269 INFO L225 Difference]: With dead ends: 55180 [2020-12-22 09:34:07,269 INFO L226 Difference]: Without dead ends: 45074 [2020-12-22 09:34:07,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:34:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45074 states. [2020-12-22 09:34:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45074 to 29822. [2020-12-22 09:34:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29822 states. [2020-12-22 09:34:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29822 states to 29822 states and 39129 transitions. [2020-12-22 09:34:10,182 INFO L78 Accepts]: Start accepts. Automaton has 29822 states and 39129 transitions. Word has length 66 [2020-12-22 09:34:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:10,182 INFO L481 AbstractCegarLoop]: Abstraction has 29822 states and 39129 transitions. [2020-12-22 09:34:10,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:34:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand 29822 states and 39129 transitions. [2020-12-22 09:34:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:10,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:10,185 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] [2020-12-22 09:34:10,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:10,400 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:34:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:10,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874186724] [2020-12-22 09:34:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:10,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874186724] [2020-12-22 09:34:10,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:10,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:10,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982567808] [2020-12-22 09:34:10,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:10,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:10,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:10,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:10,455 INFO L87 Difference]: Start difference. First operand 29822 states and 39129 transitions. Second operand 3 states. [2020-12-22 09:34:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:11,710 INFO L93 Difference]: Finished difference Result 41818 states and 54659 transitions. [2020-12-22 09:34:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:11,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:34:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:11,740 INFO L225 Difference]: With dead ends: 41818 [2020-12-22 09:34:11,740 INFO L226 Difference]: Without dead ends: 14276 [2020-12-22 09:34:11,766 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 09:34:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2020-12-22 09:34:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 13224. [2020-12-22 09:34:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13224 states. [2020-12-22 09:34:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13224 states to 13224 states and 17418 transitions. [2020-12-22 09:34:12,818 INFO L78 Accepts]: Start accepts. Automaton has 13224 states and 17418 transitions. Word has length 66 [2020-12-22 09:34:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:12,819 INFO L481 AbstractCegarLoop]: Abstraction has 13224 states and 17418 transitions. [2020-12-22 09:34:12,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 13224 states and 17418 transitions. [2020-12-22 09:34:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:12,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:12,821 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:12,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:34:12,822 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:34:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:12,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598915387] [2020-12-22 09:34:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:34:12,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598915387] [2020-12-22 09:34:12,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:12,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:12,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292774913] [2020-12-22 09:34:12,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:12,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:12,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:12,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:12,887 INFO L87 Difference]: Start difference. First operand 13224 states and 17418 transitions. Second operand 6 states. [2020-12-22 09:34:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:13,589 INFO L93 Difference]: Finished difference Result 19005 states and 24910 transitions. [2020-12-22 09:34:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:13,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:13,608 INFO L225 Difference]: With dead ends: 19005 [2020-12-22 09:34:13,608 INFO L226 Difference]: Without dead ends: 8138 [2020-12-22 09:34:13,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8138 states. [2020-12-22 09:34:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8138 to 8138. [2020-12-22 09:34:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8138 states. [2020-12-22 09:34:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8138 states to 8138 states and 10841 transitions. [2020-12-22 09:34:14,297 INFO L78 Accepts]: Start accepts. Automaton has 8138 states and 10841 transitions. Word has length 66 [2020-12-22 09:34:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:14,297 INFO L481 AbstractCegarLoop]: Abstraction has 8138 states and 10841 transitions. [2020-12-22 09:34:14,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 8138 states and 10841 transitions. [2020-12-22 09:34:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:14,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:14,299 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:14,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:34:14,300 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:34:14,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:14,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823176005] [2020-12-22 09:34:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:34:14,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823176005] [2020-12-22 09:34:14,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:14,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:14,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948212667] [2020-12-22 09:34:14,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:14,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:14,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:14,366 INFO L87 Difference]: Start difference. First operand 8138 states and 10841 transitions. Second operand 6 states. [2020-12-22 09:34:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:14,824 INFO L93 Difference]: Finished difference Result 12497 states and 16377 transitions. [2020-12-22 09:34:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:14,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:14,836 INFO L225 Difference]: With dead ends: 12497 [2020-12-22 09:34:14,836 INFO L226 Difference]: Without dead ends: 6730 [2020-12-22 09:34:14,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2020-12-22 09:34:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 6730. [2020-12-22 09:34:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6730 states. [2020-12-22 09:34:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6730 states to 6730 states and 8967 transitions. [2020-12-22 09:34:15,480 INFO L78 Accepts]: Start accepts. Automaton has 6730 states and 8967 transitions. Word has length 66 [2020-12-22 09:34:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:15,481 INFO L481 AbstractCegarLoop]: Abstraction has 6730 states and 8967 transitions. [2020-12-22 09:34:15,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6730 states and 8967 transitions. [2020-12-22 09:34:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:15,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:15,483 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:15,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:34:15,483 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:34:15,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:15,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290761023] [2020-12-22 09:34:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:34:15,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290761023] [2020-12-22 09:34:15,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:15,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:15,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344037982] [2020-12-22 09:34:15,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:15,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:15,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:15,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:15,558 INFO L87 Difference]: Start difference. First operand 6730 states and 8967 transitions. Second operand 6 states. [2020-12-22 09:34:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:16,418 INFO L93 Difference]: Finished difference Result 13545 states and 17571 transitions. [2020-12-22 09:34:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:16,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:16,429 INFO L225 Difference]: With dead ends: 13545 [2020-12-22 09:34:16,429 INFO L226 Difference]: Without dead ends: 9127 [2020-12-22 09:34:16,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9127 states. [2020-12-22 09:34:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9127 to 8549. [2020-12-22 09:34:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8549 states. [2020-12-22 09:34:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 11222 transitions. [2020-12-22 09:34:17,079 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 11222 transitions. Word has length 66 [2020-12-22 09:34:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:17,079 INFO L481 AbstractCegarLoop]: Abstraction has 8549 states and 11222 transitions. [2020-12-22 09:34:17,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 11222 transitions. [2020-12-22 09:34:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:17,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:17,081 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:17,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:34:17,081 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:34:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:17,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148171052] [2020-12-22 09:34:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148171052] [2020-12-22 09:34:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327540746] [2020-12-22 09:34:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:17,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:34:17,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:19,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:34:19,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:19,171 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:34:19,179 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:34:19,819 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 47 [2020-12-22 09:34:20,231 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:20,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:20,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2020-12-22 09:34:20,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967652803] [2020-12-22 09:34:20,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 09:34:20,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 09:34:20,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:34:20,338 INFO L87 Difference]: Start difference. First operand 8549 states and 11222 transitions. Second operand 33 states. [2020-12-22 09:34:21,806 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-12-22 09:34:22,080 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:22,382 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 09:34:22,709 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 09:34:23,058 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:25,484 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:34:25,871 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:34:26,077 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:34:26,250 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:34:26,410 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:34:26,565 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 09:34:26,937 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:34:27,451 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-12-22 09:34:27,712 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 09:34:28,123 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 09:34:28,466 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:34:29,830 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 09:34:29,999 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:34:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:30,352 INFO L93 Difference]: Finished difference Result 13794 states and 17766 transitions. [2020-12-22 09:34:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:34:30,352 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-12-22 09:34:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:30,366 INFO L225 Difference]: With dead ends: 13794 [2020-12-22 09:34:30,367 INFO L226 Difference]: Without dead ends: 10042 [2020-12-22 09:34:30,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1695, Invalid=9225, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 09:34:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10042 states. [2020-12-22 09:34:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10042 to 7724. [2020-12-22 09:34:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7724 states. [2020-12-22 09:34:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 10227 transitions. [2020-12-22 09:34:31,026 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 10227 transitions. Word has length 67 [2020-12-22 09:34:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:31,027 INFO L481 AbstractCegarLoop]: Abstraction has 7724 states and 10227 transitions. [2020-12-22 09:34:31,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 09:34:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 10227 transitions. [2020-12-22 09:34:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:31,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:31,033 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:31,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:34:31,246 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:31,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:34:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:31,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573986470] [2020-12-22 09:34:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:31,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573986470] [2020-12-22 09:34:31,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069240818] [2020-12-22 09:34:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:34:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:32,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:32,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:32,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:34:32,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392349545] [2020-12-22 09:34:32,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:34:32,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:32,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:34:32,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:34:32,569 INFO L87 Difference]: Start difference. First operand 7724 states and 10227 transitions. Second operand 22 states. [2020-12-22 09:34:32,890 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:34:33,041 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:33,206 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:34,113 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:34:34,350 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:34:34,515 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:34:34,745 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:34:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:35,706 INFO L93 Difference]: Finished difference Result 12731 states and 16645 transitions. [2020-12-22 09:34:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:34:35,707 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:34:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:35,717 INFO L225 Difference]: With dead ends: 12731 [2020-12-22 09:34:35,717 INFO L226 Difference]: Without dead ends: 10137 [2020-12-22 09:34:35,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:34:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10137 states. [2020-12-22 09:34:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10137 to 7299. [2020-12-22 09:34:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7299 states. [2020-12-22 09:34:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7299 states to 7299 states and 9728 transitions. [2020-12-22 09:34:36,257 INFO L78 Accepts]: Start accepts. Automaton has 7299 states and 9728 transitions. Word has length 67 [2020-12-22 09:34:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:36,258 INFO L481 AbstractCegarLoop]: Abstraction has 7299 states and 9728 transitions. [2020-12-22 09:34:36,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:34:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 7299 states and 9728 transitions. [2020-12-22 09:34:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:34:36,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:36,259 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:36,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:36,474 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:34:36,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:36,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719648817] [2020-12-22 09:34:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,001 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2020-12-22 09:34:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:37,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719648817] [2020-12-22 09:34:37,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959187533] [2020-12-22 09:34:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:34:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:38,595 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-12-22 09:34:38,606 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:39,108 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-12-22 09:34:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:39,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:39,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:34:39,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737272207] [2020-12-22 09:34:39,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:34:39,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:39,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:34:39,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:34:39,191 INFO L87 Difference]: Start difference. First operand 7299 states and 9728 transitions. Second operand 32 states. [2020-12-22 09:34:40,419 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 09:34:40,585 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 09:34:40,844 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:41,014 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 09:34:42,092 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-12-22 09:34:42,241 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 09:34:42,384 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 09:34:43,694 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:34:43,840 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:34:43,984 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 09:34:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:44,352 INFO L93 Difference]: Finished difference Result 10693 states and 14097 transitions. [2020-12-22 09:34:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 09:34:44,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:34:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:44,361 INFO L225 Difference]: With dead ends: 10693 [2020-12-22 09:34:44,361 INFO L226 Difference]: Without dead ends: 7814 [2020-12-22 09:34:44,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=804, Invalid=3102, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 09:34:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7814 states. [2020-12-22 09:34:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7814 to 5292. [2020-12-22 09:34:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5292 states. [2020-12-22 09:34:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 7258 transitions. [2020-12-22 09:34:44,739 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 7258 transitions. Word has length 68 [2020-12-22 09:34:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:44,740 INFO L481 AbstractCegarLoop]: Abstraction has 5292 states and 7258 transitions. [2020-12-22 09:34:44,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:34:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 7258 transitions. [2020-12-22 09:34:44,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:34:44,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:44,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-12-22 09:34:44,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:34:44,959 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:44,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:34:44,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:44,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250171684] [2020-12-22 09:34:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:45,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250171684] [2020-12-22 09:34:45,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768935246] [2020-12-22 09:34:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:45,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:34:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:45,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:45,854 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:45,954 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:45,995 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:46,088 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:47,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:47,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:34:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491318015] [2020-12-22 09:34:47,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:34:47,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:34:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:34:47,895 INFO L87 Difference]: Start difference. First operand 5292 states and 7258 transitions. Second operand 22 states. [2020-12-22 09:34:48,828 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:50,694 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:52,247 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 09:34:52,470 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:34:52,660 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:52,817 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:53,271 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 09:34:53,513 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:53,692 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-22 09:34:53,936 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:54,233 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 105 [2020-12-22 09:34:54,485 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 09:34:54,667 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:34:54,905 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:55,079 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:55,286 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:55,452 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:55,729 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:55,943 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:56,103 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:56,788 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:56,995 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:34:57,246 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:57,448 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:34:57,684 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:58,051 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:58,361 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:58,520 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:35:02,951 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:35:03,204 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 09:35:03,690 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:35:03,992 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:35:04,971 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 09:35:05,765 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2020-12-22 09:35:06,580 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2020-12-22 09:35:06,893 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 09:35:07,811 WARN L197 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 116 [2020-12-22 09:35:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:08,321 INFO L93 Difference]: Finished difference Result 10108 states and 13432 transitions. [2020-12-22 09:35:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 09:35:08,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 110 [2020-12-22 09:35:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:08,331 INFO L225 Difference]: With dead ends: 10108 [2020-12-22 09:35:08,331 INFO L226 Difference]: Without dead ends: 7344 [2020-12-22 09:35:08,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1023, Invalid=3399, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 09:35:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2020-12-22 09:35:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 5798. [2020-12-22 09:35:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-12-22 09:35:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 7781 transitions. [2020-12-22 09:35:08,955 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 7781 transitions. Word has length 110 [2020-12-22 09:35:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:08,955 INFO L481 AbstractCegarLoop]: Abstraction has 5798 states and 7781 transitions. [2020-12-22 09:35:08,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:35:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 7781 transitions. [2020-12-22 09:35:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:35:08,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:08,959 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 09:35:09,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:35:09,173 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:09,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1600436991, now seen corresponding path program 1 times [2020-12-22 09:35:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:09,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963351828] [2020-12-22 09:35:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 09:35:09,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963351828] [2020-12-22 09:35:09,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51406069] [2020-12-22 09:35:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:35:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:10,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:35:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:11,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:11,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 30 [2020-12-22 09:35:11,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073522227] [2020-12-22 09:35:11,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:35:11,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:11,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:35:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:35:11,339 INFO L87 Difference]: Start difference. First operand 5798 states and 7781 transitions. Second operand 30 states. [2020-12-22 09:35:11,570 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:35:12,403 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:35:12,656 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:35:13,129 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:35:13,381 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:13,626 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:35:13,909 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:35:14,188 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 09:35:14,532 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:35:14,923 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-12-22 09:35:15,308 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-12-22 09:35:15,692 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-22 09:35:16,078 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-22 09:35:16,419 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:35:16,777 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-22 09:35:17,147 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:35:17,462 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:17,963 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:35:18,416 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:18,842 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:35:19,296 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:19,784 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:35:20,105 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:20,469 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:35:20,815 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:35:21,062 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:21,330 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:35:21,552 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 09:35:22,700 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:23,013 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:23,507 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:35:23,916 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:35:24,164 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:35:24,646 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:25,006 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:25,260 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:35:25,909 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:26,312 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:28,303 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:35:29,185 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:35:29,808 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:35:30,144 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 09:35:30,620 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:31,115 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:31,744 INFO L93 Difference]: Finished difference Result 9380 states and 12301 transitions. [2020-12-22 09:35:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 09:35:31,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:35:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:31,753 INFO L225 Difference]: With dead ends: 9380 [2020-12-22 09:35:31,753 INFO L226 Difference]: Without dead ends: 7347 [2020-12-22 09:35:31,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=940, Invalid=5380, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 09:35:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7347 states. [2020-12-22 09:35:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7347 to 5771. [2020-12-22 09:35:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5771 states. [2020-12-22 09:35:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 7721 transitions. [2020-12-22 09:35:32,456 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 7721 transitions. Word has length 111 [2020-12-22 09:35:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:32,456 INFO L481 AbstractCegarLoop]: Abstraction has 5771 states and 7721 transitions. [2020-12-22 09:35:32,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:35:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 7721 transitions. [2020-12-22 09:35:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:35:32,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:32,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 09:35:32,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:35:32,676 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1933874233, now seen corresponding path program 1 times [2020-12-22 09:35:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802548445] [2020-12-22 09:35:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 33 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802548445] [2020-12-22 09:35:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441091537] [2020-12-22 09:35:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:35:33,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:34,978 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:35:34,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:34,986 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:34,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:35,493 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:35:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:35,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:35,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2020-12-22 09:35:35,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180997745] [2020-12-22 09:35:35,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 09:35:35,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 09:35:35,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 09:35:35,988 INFO L87 Difference]: Start difference. First operand 5771 states and 7721 transitions. Second operand 34 states. [2020-12-22 09:35:36,608 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2020-12-22 09:35:36,847 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:37,129 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:35:37,395 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:37,668 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:35:38,121 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:35:38,579 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-12-22 09:35:39,291 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-12-22 09:35:39,876 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-12-22 09:35:40,464 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-12-22 09:35:40,900 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-12-22 09:35:41,492 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-22 09:35:42,031 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-12-22 09:35:42,503 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-22 09:35:42,969 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-12-22 09:35:43,536 WARN L197 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 09:35:44,023 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-22 09:35:44,501 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-12-22 09:35:45,027 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-12-22 09:35:45,699 WARN L197 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-12-22 09:35:46,141 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 09:35:46,557 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 09:35:47,040 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:35:47,541 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:35:47,991 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-12-22 09:35:48,584 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-12-22 09:35:49,026 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:35:49,420 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:49,946 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-12-22 09:35:50,505 WARN L197 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-12-22 09:35:50,902 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-22 09:35:51,608 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-22 09:35:52,128 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-22 09:35:52,690 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:53,085 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:35:53,554 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-22 09:35:53,995 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-22 09:35:54,419 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 09:35:54,856 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:55,315 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:35:55,848 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-12-22 09:35:56,211 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-12-22 09:35:56,671 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-12-22 09:35:57,194 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-22 09:35:57,582 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-22 09:35:58,205 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-12-22 09:35:58,684 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-12-22 09:35:59,154 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-12-22 09:35:59,888 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-12-22 09:36:00,473 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-12-22 09:36:00,811 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-12-22 09:36:01,613 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-12-22 09:36:01,990 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:36:02,631 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-12-22 09:36:03,057 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 09:36:03,323 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-22 09:36:03,902 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:36:04,091 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 09:36:04,638 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-12-22 09:36:04,975 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-22 09:36:05,227 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:05,471 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 09:36:06,206 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:36:06,451 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:36:07,024 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 09:36:07,273 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:36:07,564 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:36:08,012 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 09:36:08,400 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:36:09,038 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:36:09,287 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:36:09,638 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 09:36:09,983 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:36:10,534 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 09:36:11,048 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:36:11,397 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:36:11,637 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:36:12,268 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 09:36:12,840 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:36:13,851 WARN L197 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:36:14,276 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:36:15,313 WARN L197 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 09:36:15,706 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:36:17,316 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-22 09:36:17,851 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:36:19,768 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:36:20,177 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:36:20,389 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 09:36:20,671 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 09:36:21,180 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:36:21,702 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:36:22,128 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:36:22,802 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:36:23,387 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:36:23,840 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:36:24,077 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:36:24,970 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:36:25,779 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:36:26,179 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:36:26,995 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:36:27,931 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-12-22 09:36:28,370 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 09:36:28,733 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:29,472 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 09:36:29,894 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 09:36:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:30,767 INFO L93 Difference]: Finished difference Result 13758 states and 17702 transitions. [2020-12-22 09:36:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:36:30,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 112 [2020-12-22 09:36:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:30,782 INFO L225 Difference]: With dead ends: 13758 [2020-12-22 09:36:30,782 INFO L226 Difference]: Without dead ends: 10516 [2020-12-22 09:36:30,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=3020, Invalid=18442, Unknown=0, NotChecked=0, Total=21462 [2020-12-22 09:36:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10516 states. [2020-12-22 09:36:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10516 to 6190. [2020-12-22 09:36:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6190 states. [2020-12-22 09:36:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6190 states to 6190 states and 8235 transitions. [2020-12-22 09:36:31,955 INFO L78 Accepts]: Start accepts. Automaton has 6190 states and 8235 transitions. Word has length 112 [2020-12-22 09:36:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:31,956 INFO L481 AbstractCegarLoop]: Abstraction has 6190 states and 8235 transitions. [2020-12-22 09:36:31,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 09:36:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 6190 states and 8235 transitions. [2020-12-22 09:36:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 09:36:31,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:31,959 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 09:36:32,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:36:32,169 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1117709487, now seen corresponding path program 1 times [2020-12-22 09:36:32,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:32,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300041416] [2020-12-22 09:36:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300041416] [2020-12-22 09:36:33,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646503835] [2020-12-22 09:36:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 09:36:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:35,224 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-22 09:36:35,741 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-22 09:36:36,344 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:36:37,083 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2020-12-22 09:36:37,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:36:37,956 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:38,253 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:38,688 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:39,515 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:40,227 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:41,183 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:41,881 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:42,224 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:42,351 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:42,624 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:43,233 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:44,212 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:45,149 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:45,976 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:46,471 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:46,862 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:47,374 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:37:00,989 WARN L197 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 228