/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/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:08:02,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:08:02,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:08:02,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:08:02,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:08:02,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:08:02,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:08:02,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:08:02,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:08:02,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:08:02,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:08:02,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:08:02,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:08:02,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:08:02,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:08:02,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:08:02,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:08:02,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:08:02,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:08:02,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:08:02,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:08:02,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:08:02,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:08:02,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:08:02,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:08:02,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:08:02,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:08:02,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:08:02,882 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:08:02,936 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:08:02,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:08:02,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:08:02,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:08:02,942 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:08:02,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:08:02,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:08:02,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:08:02,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:08:02,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:08:02,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:08:02,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:08:02,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:08:02,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:08:02,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:08:02,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:08:02,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:08:02,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:08:02,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:08:02,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:08:02,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:08:02,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:08:02,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:08:02,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:08:02,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:08:02,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:08:03,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:08:03,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:08:03,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:08:03,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:08:03,423 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:08:03,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:08:03,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c12531a2/491d775f965f483ca58d61ef3aa55025/FLAG23dd1b425 [2020-12-22 09:08:04,237 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:08:04,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:08:04,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c12531a2/491d775f965f483ca58d61ef3aa55025/FLAG23dd1b425 [2020-12-22 09:08:04,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c12531a2/491d775f965f483ca58d61ef3aa55025 [2020-12-22 09:08:04,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:08:04,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:08:04,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:08:04,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:08:04,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:08:04,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:08:04" (1/1) ... [2020-12-22 09:08:04,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317f101a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:04, skipping insertion in model container [2020-12-22 09:08:04,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:08:04" (1/1) ... [2020-12-22 09:08:04,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:08:04,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:08:04,987 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/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13422,13435] [2020-12-22 09:08:05,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:08:05,136 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:08:05,327 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/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13422,13435] [2020-12-22 09:08:05,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:08:05,429 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:08:05,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05 WrapperNode [2020-12-22 09:08:05,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:08:05,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:08:05,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:08:05,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:08:05,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:08:05,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:08:05,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:08:05,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:08:05,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (1/1) ... [2020-12-22 09:08:05,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:08:05,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:08:05,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:08:05,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:08:05,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (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 09:08:05,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:08:05,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:08:05,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:08:05,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:08:07,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:08:07,168 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:08:07,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:08:07 BoogieIcfgContainer [2020-12-22 09:08:07,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:08:07,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:08:07,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:08:07,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:08:07,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:08:04" (1/3) ... [2020-12-22 09:08:07,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494ff167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:08:07, skipping insertion in model container [2020-12-22 09:08:07,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:08:05" (2/3) ... [2020-12-22 09:08:07,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494ff167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:08:07, skipping insertion in model container [2020-12-22 09:08:07,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:08:07" (3/3) ... [2020-12-22 09:08:07,180 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:08:07,187 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:08:07,192 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:08:07,211 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:08:07,242 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:08:07,242 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:08:07,242 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:08:07,243 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:08:07,243 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:08:07,243 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:08:07,243 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:08:07,243 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:08:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states. [2020-12-22 09:08:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 09:08:07,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:07,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:07,289 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash 687624892, now seen corresponding path program 1 times [2020-12-22 09:08:07,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:07,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933837600] [2020-12-22 09:08:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:08,088 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 09:08:08,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933837600] [2020-12-22 09:08:08,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:08,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:08,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247200363] [2020-12-22 09:08:08,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:08,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:08,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:08,117 INFO L87 Difference]: Start difference. First operand 350 states. Second operand 3 states. [2020-12-22 09:08:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:08,275 INFO L93 Difference]: Finished difference Result 652 states and 1124 transitions. [2020-12-22 09:08:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:08,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 09:08:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:08,317 INFO L225 Difference]: With dead ends: 652 [2020-12-22 09:08:08,318 INFO L226 Difference]: Without dead ends: 489 [2020-12-22 09:08:08,322 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 09:08:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-12-22 09:08:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2020-12-22 09:08:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-12-22 09:08:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 801 transitions. [2020-12-22 09:08:08,418 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 801 transitions. Word has length 118 [2020-12-22 09:08:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:08,419 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 801 transitions. [2020-12-22 09:08:08,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 801 transitions. [2020-12-22 09:08:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 09:08:08,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:08,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:08,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:08:08,425 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash 787881554, now seen corresponding path program 1 times [2020-12-22 09:08:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:08,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002819935] [2020-12-22 09:08:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:08,659 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 09:08:08,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002819935] [2020-12-22 09:08:08,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:08,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:08,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726690270] [2020-12-22 09:08:08,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:08,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:08,665 INFO L87 Difference]: Start difference. First operand 486 states and 801 transitions. Second operand 3 states. [2020-12-22 09:08:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:08,793 INFO L93 Difference]: Finished difference Result 1052 states and 1741 transitions. [2020-12-22 09:08:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:08,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 09:08:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:08,805 INFO L225 Difference]: With dead ends: 1052 [2020-12-22 09:08:08,805 INFO L226 Difference]: Without dead ends: 759 [2020-12-22 09:08:08,812 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 09:08:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2020-12-22 09:08:08,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 755. [2020-12-22 09:08:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-12-22 09:08:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1246 transitions. [2020-12-22 09:08:08,876 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1246 transitions. Word has length 121 [2020-12-22 09:08:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:08,877 INFO L481 AbstractCegarLoop]: Abstraction has 755 states and 1246 transitions. [2020-12-22 09:08:08,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1246 transitions. [2020-12-22 09:08:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 09:08:08,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:08,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:08,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:08:08,881 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1106896185, now seen corresponding path program 1 times [2020-12-22 09:08:08,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:08,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238712441] [2020-12-22 09:08:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:09,086 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 09:08:09,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238712441] [2020-12-22 09:08:09,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:09,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404268553] [2020-12-22 09:08:09,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:09,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:09,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:09,096 INFO L87 Difference]: Start difference. First operand 755 states and 1246 transitions. Second operand 3 states. [2020-12-22 09:08:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:09,209 INFO L93 Difference]: Finished difference Result 1839 states and 3040 transitions. [2020-12-22 09:08:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:09,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 09:08:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:09,222 INFO L225 Difference]: With dead ends: 1839 [2020-12-22 09:08:09,222 INFO L226 Difference]: Without dead ends: 1277 [2020-12-22 09:08:09,224 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 09:08:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2020-12-22 09:08:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1271. [2020-12-22 09:08:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-12-22 09:08:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 2094 transitions. [2020-12-22 09:08:09,307 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 2094 transitions. Word has length 124 [2020-12-22 09:08:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:09,317 INFO L481 AbstractCegarLoop]: Abstraction has 1271 states and 2094 transitions. [2020-12-22 09:08:09,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 2094 transitions. [2020-12-22 09:08:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:08:09,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:09,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:09,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:08:09,323 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:09,324 INFO L82 PathProgramCache]: Analyzing trace with hash -854228413, now seen corresponding path program 1 times [2020-12-22 09:08:09,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:09,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254915736] [2020-12-22 09:08:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:09,558 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 09:08:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254915736] [2020-12-22 09:08:09,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:09,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959088728] [2020-12-22 09:08:09,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:09,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:09,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:09,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:09,564 INFO L87 Difference]: Start difference. First operand 1271 states and 2094 transitions. Second operand 3 states. [2020-12-22 09:08:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:09,719 INFO L93 Difference]: Finished difference Result 3347 states and 5512 transitions. [2020-12-22 09:08:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:09,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 09:08:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:09,733 INFO L225 Difference]: With dead ends: 3347 [2020-12-22 09:08:09,733 INFO L226 Difference]: Without dead ends: 2269 [2020-12-22 09:08:09,737 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 09:08:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2020-12-22 09:08:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2259. [2020-12-22 09:08:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2259 states. [2020-12-22 09:08:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3706 transitions. [2020-12-22 09:08:09,863 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3706 transitions. Word has length 127 [2020-12-22 09:08:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:09,864 INFO L481 AbstractCegarLoop]: Abstraction has 2259 states and 3706 transitions. [2020-12-22 09:08:09,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3706 transitions. [2020-12-22 09:08:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:08:09,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:09,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:09,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:08:09,867 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:09,868 INFO L82 PathProgramCache]: Analyzing trace with hash 996831134, now seen corresponding path program 1 times [2020-12-22 09:08:09,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:09,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048258162] [2020-12-22 09:08:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:10,299 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 09:08:10,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048258162] [2020-12-22 09:08:10,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:10,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:08:10,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480912108] [2020-12-22 09:08:10,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:08:10,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:08:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:08:10,304 INFO L87 Difference]: Start difference. First operand 2259 states and 3706 transitions. Second operand 6 states. [2020-12-22 09:08:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:11,358 INFO L93 Difference]: Finished difference Result 11839 states and 19570 transitions. [2020-12-22 09:08:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:08:11,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 09:08:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:11,418 INFO L225 Difference]: With dead ends: 11839 [2020-12-22 09:08:11,418 INFO L226 Difference]: Without dead ends: 9773 [2020-12-22 09:08:11,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:08:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9773 states. [2020-12-22 09:08:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9773 to 4189. [2020-12-22 09:08:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4189 states. [2020-12-22 09:08:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4189 states to 4189 states and 6873 transitions. [2020-12-22 09:08:11,855 INFO L78 Accepts]: Start accepts. Automaton has 4189 states and 6873 transitions. Word has length 130 [2020-12-22 09:08:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:11,856 INFO L481 AbstractCegarLoop]: Abstraction has 4189 states and 6873 transitions. [2020-12-22 09:08:11,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:08:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4189 states and 6873 transitions. [2020-12-22 09:08:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:08:11,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:11,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:11,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:08:11,860 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash 769932088, now seen corresponding path program 1 times [2020-12-22 09:08:11,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:11,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162487818] [2020-12-22 09:08:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:11,988 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 09:08:11,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162487818] [2020-12-22 09:08:11,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:11,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:11,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280699662] [2020-12-22 09:08:11,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:11,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:11,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:11,992 INFO L87 Difference]: Start difference. First operand 4189 states and 6873 transitions. Second operand 4 states. [2020-12-22 09:08:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:12,634 INFO L93 Difference]: Finished difference Result 12287 states and 20261 transitions. [2020-12-22 09:08:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:12,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 09:08:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:12,702 INFO L225 Difference]: With dead ends: 12287 [2020-12-22 09:08:12,702 INFO L226 Difference]: Without dead ends: 8291 [2020-12-22 09:08:12,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:08:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2020-12-22 09:08:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 6223. [2020-12-22 09:08:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6223 states. [2020-12-22 09:08:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6223 states to 6223 states and 10226 transitions. [2020-12-22 09:08:13,240 INFO L78 Accepts]: Start accepts. Automaton has 6223 states and 10226 transitions. Word has length 131 [2020-12-22 09:08:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:13,240 INFO L481 AbstractCegarLoop]: Abstraction has 6223 states and 10226 transitions. [2020-12-22 09:08:13,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6223 states and 10226 transitions. [2020-12-22 09:08:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:08:13,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:13,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:13,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:08:13,246 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1964413019, now seen corresponding path program 1 times [2020-12-22 09:08:13,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:13,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500837226] [2020-12-22 09:08:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:13,514 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 09:08:13,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500837226] [2020-12-22 09:08:13,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:13,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:13,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620054138] [2020-12-22 09:08:13,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:13,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:13,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:13,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:13,518 INFO L87 Difference]: Start difference. First operand 6223 states and 10226 transitions. Second operand 4 states. [2020-12-22 09:08:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:14,446 INFO L93 Difference]: Finished difference Result 18285 states and 30121 transitions. [2020-12-22 09:08:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:14,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 09:08:14,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:14,484 INFO L225 Difference]: With dead ends: 18285 [2020-12-22 09:08:14,484 INFO L226 Difference]: Without dead ends: 12255 [2020-12-22 09:08:14,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:08:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12255 states. [2020-12-22 09:08:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12255 to 9215. [2020-12-22 09:08:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9215 states. [2020-12-22 09:08:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9215 states to 9215 states and 15128 transitions. [2020-12-22 09:08:15,265 INFO L78 Accepts]: Start accepts. Automaton has 9215 states and 15128 transitions. Word has length 132 [2020-12-22 09:08:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:15,266 INFO L481 AbstractCegarLoop]: Abstraction has 9215 states and 15128 transitions. [2020-12-22 09:08:15,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 9215 states and 15128 transitions. [2020-12-22 09:08:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 09:08:15,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:15,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:08:15,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:08:15,272 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash -825207393, now seen corresponding path program 1 times [2020-12-22 09:08:15,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:15,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077623498] [2020-12-22 09:08:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:15,436 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 09:08:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077623498] [2020-12-22 09:08:15,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:15,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504336669] [2020-12-22 09:08:15,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:15,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:15,439 INFO L87 Difference]: Start difference. First operand 9215 states and 15128 transitions. Second operand 4 states. [2020-12-22 09:08:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:16,735 INFO L93 Difference]: Finished difference Result 27109 states and 44609 transitions. [2020-12-22 09:08:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:16,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 09:08:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:16,787 INFO L225 Difference]: With dead ends: 27109 [2020-12-22 09:08:16,788 INFO L226 Difference]: Without dead ends: 18087 [2020-12-22 09:08:16,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:08:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18087 states. [2020-12-22 09:08:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18087 to 13617. [2020-12-22 09:08:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13617 states. [2020-12-22 09:08:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13617 states to 13617 states and 22332 transitions. [2020-12-22 09:08:17,763 INFO L78 Accepts]: Start accepts. Automaton has 13617 states and 22332 transitions. Word has length 133 [2020-12-22 09:08:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:17,763 INFO L481 AbstractCegarLoop]: Abstraction has 13617 states and 22332 transitions. [2020-12-22 09:08:17,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 13617 states and 22332 transitions. [2020-12-22 09:08:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:08:17,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:17,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:17,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:08:17,771 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2032293143, now seen corresponding path program 1 times [2020-12-22 09:08:17,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:17,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733461803] [2020-12-22 09:08:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:17,858 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 09:08:17,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733461803] [2020-12-22 09:08:17,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:17,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:17,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69444637] [2020-12-22 09:08:17,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:17,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:17,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:17,861 INFO L87 Difference]: Start difference. First operand 13617 states and 22332 transitions. Second operand 3 states. [2020-12-22 09:08:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:18,856 INFO L93 Difference]: Finished difference Result 30205 states and 49579 transitions. [2020-12-22 09:08:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:18,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:08:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:18,916 INFO L225 Difference]: With dead ends: 30205 [2020-12-22 09:08:18,916 INFO L226 Difference]: Without dead ends: 20859 [2020-12-22 09:08:18,932 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 09:08:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20859 states. [2020-12-22 09:08:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20859 to 20857. [2020-12-22 09:08:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20857 states. [2020-12-22 09:08:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20857 states to 20857 states and 34111 transitions. [2020-12-22 09:08:20,154 INFO L78 Accepts]: Start accepts. Automaton has 20857 states and 34111 transitions. Word has length 134 [2020-12-22 09:08:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:20,155 INFO L481 AbstractCegarLoop]: Abstraction has 20857 states and 34111 transitions. [2020-12-22 09:08:20,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20857 states and 34111 transitions. [2020-12-22 09:08:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:08:20,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:20,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:20,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:08:20,159 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:20,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1085233451, now seen corresponding path program 1 times [2020-12-22 09:08:20,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:20,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812584592] [2020-12-22 09:08:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:20,267 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 09:08:20,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812584592] [2020-12-22 09:08:20,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932595983] [2020-12-22 09:08:20,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:20,270 INFO L87 Difference]: Start difference. First operand 20857 states and 34111 transitions. Second operand 3 states. [2020-12-22 09:08:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:21,753 INFO L93 Difference]: Finished difference Result 46075 states and 75425 transitions. [2020-12-22 09:08:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:21,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:08:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:21,831 INFO L225 Difference]: With dead ends: 46075 [2020-12-22 09:08:21,832 INFO L226 Difference]: Without dead ends: 31711 [2020-12-22 09:08:21,866 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 09:08:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31711 states. [2020-12-22 09:08:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31711 to 31709. [2020-12-22 09:08:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31709 states. [2020-12-22 09:08:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31709 states to 31709 states and 51693 transitions. [2020-12-22 09:08:23,683 INFO L78 Accepts]: Start accepts. Automaton has 31709 states and 51693 transitions. Word has length 134 [2020-12-22 09:08:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:23,683 INFO L481 AbstractCegarLoop]: Abstraction has 31709 states and 51693 transitions. [2020-12-22 09:08:23,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 31709 states and 51693 transitions. [2020-12-22 09:08:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:08:23,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:23,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:23,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:08:23,695 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1854132875, now seen corresponding path program 1 times [2020-12-22 09:08:23,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:23,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527807653] [2020-12-22 09:08:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:23,808 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 09:08:23,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527807653] [2020-12-22 09:08:23,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:23,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:23,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952783363] [2020-12-22 09:08:23,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:23,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:23,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:23,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:23,811 INFO L87 Difference]: Start difference. First operand 31709 states and 51693 transitions. Second operand 3 states. [2020-12-22 09:08:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:26,143 INFO L93 Difference]: Finished difference Result 61885 states and 101019 transitions. [2020-12-22 09:08:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:26,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:08:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:26,216 INFO L225 Difference]: With dead ends: 61885 [2020-12-22 09:08:26,217 INFO L226 Difference]: Without dead ends: 44439 [2020-12-22 09:08:26,250 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 09:08:26,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44439 states. [2020-12-22 09:08:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44439 to 44437. [2020-12-22 09:08:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44437 states. [2020-12-22 09:08:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44437 states to 44437 states and 72219 transitions. [2020-12-22 09:08:28,996 INFO L78 Accepts]: Start accepts. Automaton has 44437 states and 72219 transitions. Word has length 134 [2020-12-22 09:08:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:28,996 INFO L481 AbstractCegarLoop]: Abstraction has 44437 states and 72219 transitions. [2020-12-22 09:08:28,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44437 states and 72219 transitions. [2020-12-22 09:08:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:08:28,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:28,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:28,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:08:29,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 134986668, now seen corresponding path program 1 times [2020-12-22 09:08:29,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976470645] [2020-12-22 09:08:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:29,095 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 09:08:29,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976470645] [2020-12-22 09:08:29,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:29,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:29,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111811260] [2020-12-22 09:08:29,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:29,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:29,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:29,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:29,097 INFO L87 Difference]: Start difference. First operand 44437 states and 72219 transitions. Second operand 4 states. [2020-12-22 09:08:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:34,014 INFO L93 Difference]: Finished difference Result 141593 states and 230510 transitions. [2020-12-22 09:08:34,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:08:34,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 09:08:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:34,198 INFO L225 Difference]: With dead ends: 141593 [2020-12-22 09:08:34,198 INFO L226 Difference]: Without dead ends: 97569 [2020-12-22 09:08:34,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:08:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97569 states. [2020-12-22 09:08:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97569 to 70869. [2020-12-22 09:08:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70869 states. [2020-12-22 09:08:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70869 states to 70869 states and 114919 transitions. [2020-12-22 09:08:38,558 INFO L78 Accepts]: Start accepts. Automaton has 70869 states and 114919 transitions. Word has length 134 [2020-12-22 09:08:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:38,558 INFO L481 AbstractCegarLoop]: Abstraction has 70869 states and 114919 transitions. [2020-12-22 09:08:38,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:08:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand 70869 states and 114919 transitions. [2020-12-22 09:08:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:08:38,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:38,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:38,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:08:38,561 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash -463241883, now seen corresponding path program 1 times [2020-12-22 09:08:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:38,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536214869] [2020-12-22 09:08:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:38,638 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 09:08:38,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536214869] [2020-12-22 09:08:38,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:38,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:08:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870518604] [2020-12-22 09:08:38,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:08:38,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:38,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:08:38,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:08:38,641 INFO L87 Difference]: Start difference. First operand 70869 states and 114919 transitions. Second operand 3 states. [2020-12-22 09:08:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:08:44,227 INFO L93 Difference]: Finished difference Result 156082 states and 254329 transitions. [2020-12-22 09:08:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:08:44,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:08:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:08:44,449 INFO L225 Difference]: With dead ends: 156082 [2020-12-22 09:08:44,449 INFO L226 Difference]: Without dead ends: 105867 [2020-12-22 09:08:44,503 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 09:08:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105867 states. [2020-12-22 09:08:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105867 to 105865. [2020-12-22 09:08:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105865 states. [2020-12-22 09:08:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105865 states to 105865 states and 171369 transitions. [2020-12-22 09:08:50,869 INFO L78 Accepts]: Start accepts. Automaton has 105865 states and 171369 transitions. Word has length 134 [2020-12-22 09:08:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:08:50,869 INFO L481 AbstractCegarLoop]: Abstraction has 105865 states and 171369 transitions. [2020-12-22 09:08:50,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:08:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 105865 states and 171369 transitions. [2020-12-22 09:08:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:08:50,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:08:50,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:08:50,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:08:50,871 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:08:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:08:50,871 INFO L82 PathProgramCache]: Analyzing trace with hash -644135267, now seen corresponding path program 1 times [2020-12-22 09:08:50,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:08:50,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760112406] [2020-12-22 09:08:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:08:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:08:51,286 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-12-22 09:08:51,364 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 09:08:51,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760112406] [2020-12-22 09:08:51,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:08:51,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:08:51,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295634282] [2020-12-22 09:08:51,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:08:51,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:08:51,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:08:51,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:08:51,367 INFO L87 Difference]: Start difference. First operand 105865 states and 171369 transitions. Second operand 4 states. [2020-12-22 09:09:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:09:03,248 INFO L93 Difference]: Finished difference Result 313617 states and 507550 transitions. [2020-12-22 09:09:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:09:03,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 09:09:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:09:03,708 INFO L225 Difference]: With dead ends: 313617 [2020-12-22 09:09:03,708 INFO L226 Difference]: Without dead ends: 207763 [2020-12-22 09:09:03,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:09:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207763 states. [2020-12-22 09:09:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207763 to 207761. [2020-12-22 09:09:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207761 states. [2020-12-22 09:09:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207761 states to 207761 states and 335023 transitions. [2020-12-22 09:09:16,595 INFO L78 Accepts]: Start accepts. Automaton has 207761 states and 335023 transitions. Word has length 136 [2020-12-22 09:09:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:09:16,595 INFO L481 AbstractCegarLoop]: Abstraction has 207761 states and 335023 transitions. [2020-12-22 09:09:16,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:09:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 207761 states and 335023 transitions. [2020-12-22 09:09:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 09:09:16,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:09:16,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:09:16,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:09:16,597 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:09:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:09:16,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1014832252, now seen corresponding path program 1 times [2020-12-22 09:09:16,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:09:16,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146377723] [2020-12-22 09:09:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:09:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:09:17,073 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 09:09:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146377723] [2020-12-22 09:09:17,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:09:17,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:09:17,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448606091] [2020-12-22 09:09:17,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:09:17,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:09:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:09:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:17,077 INFO L87 Difference]: Start difference. First operand 207761 states and 335023 transitions. Second operand 3 states. [2020-12-22 09:09:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:09:34,259 INFO L93 Difference]: Finished difference Result 500842 states and 811062 transitions. [2020-12-22 09:09:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:09:34,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-22 09:09:34,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:09:35,030 INFO L225 Difference]: With dead ends: 500842 [2020-12-22 09:09:35,031 INFO L226 Difference]: Without dead ends: 293477 [2020-12-22 09:09:35,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293477 states. [2020-12-22 09:09:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293477 to 284961. [2020-12-22 09:09:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284961 states. [2020-12-22 09:09:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284961 states to 284961 states and 458048 transitions. [2020-12-22 09:09:53,005 INFO L78 Accepts]: Start accepts. Automaton has 284961 states and 458048 transitions. Word has length 137 [2020-12-22 09:09:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:09:53,005 INFO L481 AbstractCegarLoop]: Abstraction has 284961 states and 458048 transitions. [2020-12-22 09:09:53,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:09:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 284961 states and 458048 transitions. [2020-12-22 09:09:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 09:09:53,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:09:53,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:09:53,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:09:53,009 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:09:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:09:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1296071763, now seen corresponding path program 1 times [2020-12-22 09:09:53,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:09:53,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784299412] [2020-12-22 09:09:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:09:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:09:53,187 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 09:09:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784299412] [2020-12-22 09:09:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:09:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:09:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922418328] [2020-12-22 09:09:53,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:09:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:09:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:09:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:09:53,192 INFO L87 Difference]: Start difference. First operand 284961 states and 458048 transitions. Second operand 3 states.