/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/pals_lcr.4.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:32:25,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:32:25,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:32:25,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:32:25,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:32:25,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:32:25,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:32:25,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:32:25,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:32:25,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:32:25,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:32:25,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:32:25,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:32:25,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:32:25,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:32:25,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:32:25,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:32:25,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:32:25,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:32:25,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:32:25,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:32:25,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:32:25,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:32:25,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:32:25,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:32:25,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:32:25,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:32:25,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:32:25,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:32:25,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:32:25,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:32:25,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:32:25,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:32:25,662 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:32:25,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:32:25,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:32:25,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:32:25,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:32:25,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:32:25,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:32:25,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:32:25,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:32:25,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:32:25,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:32:25,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:32:25,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:32:25,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:32:25,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:32:25,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:32:25,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:32:25,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:32:25,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:32:25,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:32:25,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:32:25,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:32:26,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:32:26,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:32:26,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:32:26,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:32:26,160 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:32:26,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:32:26,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d6182f3c/7c7f35b7373c4e5b8fa09f70cdd00c9f/FLAGac2bfee9a [2020-12-22 07:32:26,989 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:32:26,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:32:27,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d6182f3c/7c7f35b7373c4e5b8fa09f70cdd00c9f/FLAGac2bfee9a [2020-12-22 07:32:27,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d6182f3c/7c7f35b7373c4e5b8fa09f70cdd00c9f [2020-12-22 07:32:27,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:32:27,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:32:27,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:27,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:32:27,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:32:27,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44dff5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27, skipping insertion in model container [2020-12-22 07:32:27,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:32:27,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:32:27,598 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/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355] [2020-12-22 07:32:27,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:27,613 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:32:27,660 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/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355] [2020-12-22 07:32:27,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:32:27,682 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:32:27,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27 WrapperNode [2020-12-22 07:32:27,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:32:27,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:27,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:32:27,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:32:27,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:32:27,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:32:27,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:32:27,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:32:27,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... [2020-12-22 07:32:27,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:32:27,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:32:27,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:32:27,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:32:27,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:32:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:32:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:32:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:32:27,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:32:28,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:32:28,791 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:32:28,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:28 BoogieIcfgContainer [2020-12-22 07:32:28,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:32:28,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:32:28,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:32:28,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:32:28,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:32:27" (1/3) ... [2020-12-22 07:32:28,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7792258f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:28, skipping insertion in model container [2020-12-22 07:32:28,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:27" (2/3) ... [2020-12-22 07:32:28,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7792258f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:28, skipping insertion in model container [2020-12-22 07:32:28,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:28" (3/3) ... [2020-12-22 07:32:28,803 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2020-12-22 07:32:28,810 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:32:28,816 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:32:28,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:32:28,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:32:28,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:32:28,865 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:32:28,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:32:28,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:32:28,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:32:28,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:32:28,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:32:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-12-22 07:32:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:32:28,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:28,892 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] [2020-12-22 07:32:28,892 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash -171388107, now seen corresponding path program 1 times [2020-12-22 07:32:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:28,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513066080] [2020-12-22 07:32:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:29,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513066080] [2020-12-22 07:32:29,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:32:29,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833365241] [2020-12-22 07:32:29,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:32:29,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:32:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:32:29,144 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 2 states. [2020-12-22 07:32:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,185 INFO L93 Difference]: Finished difference Result 124 states and 205 transitions. [2020-12-22 07:32:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:32:29,187 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-12-22 07:32:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,214 INFO L225 Difference]: With dead ends: 124 [2020-12-22 07:32:29,214 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 07:32:29,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:32:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 07:32:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 07:32:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 07:32:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 123 transitions. [2020-12-22 07:32:29,274 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 123 transitions. Word has length 29 [2020-12-22 07:32:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,275 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 123 transitions. [2020-12-22 07:32:29,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:32:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 123 transitions. [2020-12-22 07:32:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:32:29,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,277 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] [2020-12-22 07:32:29,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:32:29,278 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,279 INFO L82 PathProgramCache]: Analyzing trace with hash -305401613, now seen corresponding path program 1 times [2020-12-22 07:32:29,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083602413] [2020-12-22 07:32:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083602413] [2020-12-22 07:32:29,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:29,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110022298] [2020-12-22 07:32:29,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:32:29,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:32:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:32:29,396 INFO L87 Difference]: Start difference. First operand 74 states and 123 transitions. Second operand 5 states. [2020-12-22 07:32:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,481 INFO L93 Difference]: Finished difference Result 123 states and 198 transitions. [2020-12-22 07:32:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:32:29,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 07:32:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,483 INFO L225 Difference]: With dead ends: 123 [2020-12-22 07:32:29,483 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 07:32:29,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 07:32:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 07:32:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 07:32:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2020-12-22 07:32:29,496 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 29 [2020-12-22 07:32:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,497 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2020-12-22 07:32:29,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:32:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2020-12-22 07:32:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:29,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,499 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] [2020-12-22 07:32:29,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:32:29,499 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1295954354, now seen corresponding path program 1 times [2020-12-22 07:32:29,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977809004] [2020-12-22 07:32:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:29,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977809004] [2020-12-22 07:32:29,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:29,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907952884] [2020-12-22 07:32:29,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,673 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 3 states. [2020-12-22 07:32:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,700 INFO L93 Difference]: Finished difference Result 158 states and 232 transitions. [2020-12-22 07:32:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:29,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,703 INFO L225 Difference]: With dead ends: 158 [2020-12-22 07:32:29,703 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 07:32:29,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 07:32:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-12-22 07:32:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 07:32:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2020-12-22 07:32:29,719 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 51 [2020-12-22 07:32:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,719 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2020-12-22 07:32:29,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2020-12-22 07:32:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:29,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,722 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] [2020-12-22 07:32:29,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:32:29,722 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1404728260, now seen corresponding path program 1 times [2020-12-22 07:32:29,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31138789] [2020-12-22 07:32:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:29,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31138789] [2020-12-22 07:32:29,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:29,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169576842] [2020-12-22 07:32:29,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:29,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,821 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand 3 states. [2020-12-22 07:32:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:29,856 INFO L93 Difference]: Finished difference Result 263 states and 399 transitions. [2020-12-22 07:32:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:29,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 07:32:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:29,860 INFO L225 Difference]: With dead ends: 263 [2020-12-22 07:32:29,860 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 07:32:29,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 07:32:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-12-22 07:32:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 07:32:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 266 transitions. [2020-12-22 07:32:29,885 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 266 transitions. Word has length 51 [2020-12-22 07:32:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,885 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 266 transitions. [2020-12-22 07:32:29,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 266 transitions. [2020-12-22 07:32:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 07:32:29,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,888 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] [2020-12-22 07:32:29,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:32:29,888 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1742521402, now seen corresponding path program 1 times [2020-12-22 07:32:29,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875613813] [2020-12-22 07:32:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:30,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875613813] [2020-12-22 07:32:30,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:30,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:30,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688866252] [2020-12-22 07:32:30,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:30,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:30,112 INFO L87 Difference]: Start difference. First operand 179 states and 266 transitions. Second operand 6 states. [2020-12-22 07:32:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:30,398 INFO L93 Difference]: Finished difference Result 1379 states and 2162 transitions. [2020-12-22 07:32:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:32:30,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 07:32:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:30,408 INFO L225 Difference]: With dead ends: 1379 [2020-12-22 07:32:30,408 INFO L226 Difference]: Without dead ends: 1229 [2020-12-22 07:32:30,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:32:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2020-12-22 07:32:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 327. [2020-12-22 07:32:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 07:32:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 494 transitions. [2020-12-22 07:32:30,475 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 494 transitions. Word has length 51 [2020-12-22 07:32:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:30,476 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 494 transitions. [2020-12-22 07:32:30,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 494 transitions. [2020-12-22 07:32:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:32:30,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:30,479 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] [2020-12-22 07:32:30,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:32:30,479 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1889876246, now seen corresponding path program 1 times [2020-12-22 07:32:30,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:30,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564059096] [2020-12-22 07:32:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:30,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564059096] [2020-12-22 07:32:30,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:30,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:30,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255762277] [2020-12-22 07:32:30,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:30,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:30,569 INFO L87 Difference]: Start difference. First operand 327 states and 494 transitions. Second operand 3 states. [2020-12-22 07:32:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:30,641 INFO L93 Difference]: Finished difference Result 879 states and 1348 transitions. [2020-12-22 07:32:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:30,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 07:32:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:30,646 INFO L225 Difference]: With dead ends: 879 [2020-12-22 07:32:30,646 INFO L226 Difference]: Without dead ends: 581 [2020-12-22 07:32:30,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-12-22 07:32:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 571. [2020-12-22 07:32:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-22 07:32:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 854 transitions. [2020-12-22 07:32:30,687 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 854 transitions. Word has length 53 [2020-12-22 07:32:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:30,689 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 854 transitions. [2020-12-22 07:32:30,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 854 transitions. [2020-12-22 07:32:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:32:30,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:30,694 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] [2020-12-22 07:32:30,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:32:30,695 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1823382734, now seen corresponding path program 1 times [2020-12-22 07:32:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:30,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204045248] [2020-12-22 07:32:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:30,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204045248] [2020-12-22 07:32:30,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:30,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:30,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634907517] [2020-12-22 07:32:30,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:30,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:30,980 INFO L87 Difference]: Start difference. First operand 571 states and 854 transitions. Second operand 6 states. [2020-12-22 07:32:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:31,134 INFO L93 Difference]: Finished difference Result 1115 states and 1680 transitions. [2020-12-22 07:32:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:31,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 07:32:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:31,139 INFO L225 Difference]: With dead ends: 1115 [2020-12-22 07:32:31,139 INFO L226 Difference]: Without dead ends: 573 [2020-12-22 07:32:31,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:32:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-12-22 07:32:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 571. [2020-12-22 07:32:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-22 07:32:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 846 transitions. [2020-12-22 07:32:31,172 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 846 transitions. Word has length 53 [2020-12-22 07:32:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:31,172 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 846 transitions. [2020-12-22 07:32:31,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 846 transitions. [2020-12-22 07:32:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:32:31,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:31,174 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] [2020-12-22 07:32:31,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:32:31,174 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash -34468658, now seen corresponding path program 1 times [2020-12-22 07:32:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:31,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426984325] [2020-12-22 07:32:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:31,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426984325] [2020-12-22 07:32:31,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:31,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:31,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317435081] [2020-12-22 07:32:31,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:31,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:31,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:31,229 INFO L87 Difference]: Start difference. First operand 571 states and 846 transitions. Second operand 3 states. [2020-12-22 07:32:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:31,292 INFO L93 Difference]: Finished difference Result 1559 states and 2320 transitions. [2020-12-22 07:32:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:31,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 07:32:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:31,300 INFO L225 Difference]: With dead ends: 1559 [2020-12-22 07:32:31,300 INFO L226 Difference]: Without dead ends: 1017 [2020-12-22 07:32:31,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2020-12-22 07:32:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1015. [2020-12-22 07:32:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-12-22 07:32:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1486 transitions. [2020-12-22 07:32:31,362 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1486 transitions. Word has length 53 [2020-12-22 07:32:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:31,363 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1486 transitions. [2020-12-22 07:32:31,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1486 transitions. [2020-12-22 07:32:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 07:32:31,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:31,364 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] [2020-12-22 07:32:31,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:32:31,365 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:31,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1105013027, now seen corresponding path program 1 times [2020-12-22 07:32:31,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:31,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035817866] [2020-12-22 07:32:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:31,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035817866] [2020-12-22 07:32:31,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:31,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:32:31,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137952366] [2020-12-22 07:32:31,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:32:31,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:31,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:32:31,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:32:31,487 INFO L87 Difference]: Start difference. First operand 1015 states and 1486 transitions. Second operand 8 states. [2020-12-22 07:32:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:31,734 INFO L93 Difference]: Finished difference Result 1769 states and 2571 transitions. [2020-12-22 07:32:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:32:31,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-12-22 07:32:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:31,746 INFO L225 Difference]: With dead ends: 1769 [2020-12-22 07:32:31,746 INFO L226 Difference]: Without dead ends: 1767 [2020-12-22 07:32:31,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:32:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-12-22 07:32:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1063. [2020-12-22 07:32:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2020-12-22 07:32:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1526 transitions. [2020-12-22 07:32:31,838 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1526 transitions. Word has length 54 [2020-12-22 07:32:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:31,840 INFO L481 AbstractCegarLoop]: Abstraction has 1063 states and 1526 transitions. [2020-12-22 07:32:31,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:32:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1526 transitions. [2020-12-22 07:32:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 07:32:31,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:31,841 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] [2020-12-22 07:32:31,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:32:31,841 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:31,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1044582089, now seen corresponding path program 1 times [2020-12-22 07:32:31,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:31,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755295467] [2020-12-22 07:32:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:31,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755295467] [2020-12-22 07:32:31,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:31,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080298953] [2020-12-22 07:32:31,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:31,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:31,901 INFO L87 Difference]: Start difference. First operand 1063 states and 1526 transitions. Second operand 3 states. [2020-12-22 07:32:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:32,033 INFO L93 Difference]: Finished difference Result 2126 states and 3084 transitions. [2020-12-22 07:32:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:32,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 07:32:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:32,044 INFO L225 Difference]: With dead ends: 2126 [2020-12-22 07:32:32,045 INFO L226 Difference]: Without dead ends: 1531 [2020-12-22 07:32:32,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2020-12-22 07:32:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1529. [2020-12-22 07:32:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1529 states. [2020-12-22 07:32:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2184 transitions. [2020-12-22 07:32:32,161 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2184 transitions. Word has length 55 [2020-12-22 07:32:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:32,161 INFO L481 AbstractCegarLoop]: Abstraction has 1529 states and 2184 transitions. [2020-12-22 07:32:32,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2184 transitions. [2020-12-22 07:32:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:32:32,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:32,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:32,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:32:32,164 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:32,165 INFO L82 PathProgramCache]: Analyzing trace with hash -993002958, now seen corresponding path program 1 times [2020-12-22 07:32:32,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:32,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589710553] [2020-12-22 07:32:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:32:32,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589710553] [2020-12-22 07:32:32,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:32,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:32,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009611383] [2020-12-22 07:32:32,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:32,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:32,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:32,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:32,296 INFO L87 Difference]: Start difference. First operand 1529 states and 2184 transitions. Second operand 6 states. [2020-12-22 07:32:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:32,885 INFO L93 Difference]: Finished difference Result 7835 states and 11225 transitions. [2020-12-22 07:32:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:32,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 07:32:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:32,921 INFO L225 Difference]: With dead ends: 7835 [2020-12-22 07:32:32,921 INFO L226 Difference]: Without dead ends: 6337 [2020-12-22 07:32:32,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2020-12-22 07:32:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 3025. [2020-12-22 07:32:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3025 states. [2020-12-22 07:32:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4312 transitions. [2020-12-22 07:32:33,188 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4312 transitions. Word has length 77 [2020-12-22 07:32:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:33,188 INFO L481 AbstractCegarLoop]: Abstraction has 3025 states and 4312 transitions. [2020-12-22 07:32:33,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4312 transitions. [2020-12-22 07:32:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:32:33,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:33,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:33,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:32:33,191 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:33,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1543800376, now seen corresponding path program 1 times [2020-12-22 07:32:33,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:33,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412176323] [2020-12-22 07:32:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:32:33,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412176323] [2020-12-22 07:32:33,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:33,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:33,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175574881] [2020-12-22 07:32:33,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:33,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:33,311 INFO L87 Difference]: Start difference. First operand 3025 states and 4312 transitions. Second operand 6 states. [2020-12-22 07:32:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:33,910 INFO L93 Difference]: Finished difference Result 9331 states and 13353 transitions. [2020-12-22 07:32:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:33,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 07:32:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:33,952 INFO L225 Difference]: With dead ends: 9331 [2020-12-22 07:32:33,952 INFO L226 Difference]: Without dead ends: 7833 [2020-12-22 07:32:33,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2020-12-22 07:32:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5273. [2020-12-22 07:32:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5273 states. [2020-12-22 07:32:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 7484 transitions. [2020-12-22 07:32:34,463 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 7484 transitions. Word has length 77 [2020-12-22 07:32:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:34,464 INFO L481 AbstractCegarLoop]: Abstraction has 5273 states and 7484 transitions. [2020-12-22 07:32:34,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 7484 transitions. [2020-12-22 07:32:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:32:34,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:34,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:34,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:32:34,468 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash -412160536, now seen corresponding path program 1 times [2020-12-22 07:32:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:34,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32325605] [2020-12-22 07:32:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:32:34,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32325605] [2020-12-22 07:32:34,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:34,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:34,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554587537] [2020-12-22 07:32:34,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:34,631 INFO L87 Difference]: Start difference. First operand 5273 states and 7484 transitions. Second operand 6 states. [2020-12-22 07:32:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:35,367 INFO L93 Difference]: Finished difference Result 10827 states and 15481 transitions. [2020-12-22 07:32:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:35,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 07:32:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:35,410 INFO L225 Difference]: With dead ends: 10827 [2020-12-22 07:32:35,410 INFO L226 Difference]: Without dead ends: 9329 [2020-12-22 07:32:35,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2020-12-22 07:32:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 6769. [2020-12-22 07:32:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6769 states. [2020-12-22 07:32:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 9612 transitions. [2020-12-22 07:32:36,025 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 9612 transitions. Word has length 77 [2020-12-22 07:32:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:36,026 INFO L481 AbstractCegarLoop]: Abstraction has 6769 states and 9612 transitions. [2020-12-22 07:32:36,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 9612 transitions. [2020-12-22 07:32:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:32:36,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:36,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:36,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:32:36,030 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1033264429, now seen corresponding path program 1 times [2020-12-22 07:32:36,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:36,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395132337] [2020-12-22 07:32:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395132337] [2020-12-22 07:32:36,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:36,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:36,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283327952] [2020-12-22 07:32:36,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:36,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:36,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:36,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:36,130 INFO L87 Difference]: Start difference. First operand 6769 states and 9612 transitions. Second operand 6 states. [2020-12-22 07:32:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:36,876 INFO L93 Difference]: Finished difference Result 11443 states and 16377 transitions. [2020-12-22 07:32:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:36,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 07:32:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:36,901 INFO L225 Difference]: With dead ends: 11443 [2020-12-22 07:32:36,902 INFO L226 Difference]: Without dead ends: 10385 [2020-12-22 07:32:36,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2020-12-22 07:32:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 7825. [2020-12-22 07:32:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7825 states. [2020-12-22 07:32:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 11132 transitions. [2020-12-22 07:32:37,591 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 11132 transitions. Word has length 79 [2020-12-22 07:32:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:37,591 INFO L481 AbstractCegarLoop]: Abstraction has 7825 states and 11132 transitions. [2020-12-22 07:32:37,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 11132 transitions. [2020-12-22 07:32:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:32:37,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:37,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:37,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:32:37,595 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2142307542, now seen corresponding path program 1 times [2020-12-22 07:32:37,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:37,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800954598] [2020-12-22 07:32:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:37,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800954598] [2020-12-22 07:32:37,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:37,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:37,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506122312] [2020-12-22 07:32:37,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:37,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:37,665 INFO L87 Difference]: Start difference. First operand 7825 states and 11132 transitions. Second operand 3 states. [2020-12-22 07:32:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:38,113 INFO L93 Difference]: Finished difference Result 13662 states and 19524 transitions. [2020-12-22 07:32:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:38,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:32:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:38,126 INFO L225 Difference]: With dead ends: 13662 [2020-12-22 07:32:38,126 INFO L226 Difference]: Without dead ends: 5868 [2020-12-22 07:32:38,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2020-12-22 07:32:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5866. [2020-12-22 07:32:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5866 states. [2020-12-22 07:32:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 8333 transitions. [2020-12-22 07:32:38,595 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 8333 transitions. Word has length 79 [2020-12-22 07:32:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:38,596 INFO L481 AbstractCegarLoop]: Abstraction has 5866 states and 8333 transitions. [2020-12-22 07:32:38,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 8333 transitions. [2020-12-22 07:32:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:32:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:38,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:38,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:32:38,599 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash -848547533, now seen corresponding path program 1 times [2020-12-22 07:32:38,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:38,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343618697] [2020-12-22 07:32:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:38,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343618697] [2020-12-22 07:32:38,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:38,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:38,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912981047] [2020-12-22 07:32:38,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:38,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:38,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:38,669 INFO L87 Difference]: Start difference. First operand 5866 states and 8333 transitions. Second operand 3 states. [2020-12-22 07:32:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:38,865 INFO L93 Difference]: Finished difference Result 8774 states and 12471 transitions. [2020-12-22 07:32:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:38,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:32:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:38,873 INFO L225 Difference]: With dead ends: 8774 [2020-12-22 07:32:38,873 INFO L226 Difference]: Without dead ends: 2964 [2020-12-22 07:32:38,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2020-12-22 07:32:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2962. [2020-12-22 07:32:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2962 states. [2020-12-22 07:32:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4153 transitions. [2020-12-22 07:32:39,102 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4153 transitions. Word has length 80 [2020-12-22 07:32:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:39,102 INFO L481 AbstractCegarLoop]: Abstraction has 2962 states and 4153 transitions. [2020-12-22 07:32:39,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4153 transitions. [2020-12-22 07:32:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:32:39,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:39,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:39,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:32:39,108 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1967822743, now seen corresponding path program 1 times [2020-12-22 07:32:39,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:39,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975515952] [2020-12-22 07:32:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:39,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975515952] [2020-12-22 07:32:39,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963095165] [2020-12-22 07:32:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:32:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:39,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:32:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:32:39,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:39,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:32:40,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666672032] [2020-12-22 07:32:40,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:32:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:32:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:32:40,004 INFO L87 Difference]: Start difference. First operand 2962 states and 4153 transitions. Second operand 12 states. [2020-12-22 07:32:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:43,472 INFO L93 Difference]: Finished difference Result 19908 states and 27500 transitions. [2020-12-22 07:32:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 07:32:43,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-12-22 07:32:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:43,506 INFO L225 Difference]: With dead ends: 19908 [2020-12-22 07:32:43,507 INFO L226 Difference]: Without dead ends: 17002 [2020-12-22 07:32:43,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 07:32:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17002 states. [2020-12-22 07:32:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17002 to 10036. [2020-12-22 07:32:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10036 states. [2020-12-22 07:32:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 13594 transitions. [2020-12-22 07:32:44,397 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 13594 transitions. Word has length 80 [2020-12-22 07:32:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:44,397 INFO L481 AbstractCegarLoop]: Abstraction has 10036 states and 13594 transitions. [2020-12-22 07:32:44,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:32:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 13594 transitions. [2020-12-22 07:32:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:32:44,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:44,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:44,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 07:32:44,616 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash -907232945, now seen corresponding path program 1 times [2020-12-22 07:32:44,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:44,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171502835] [2020-12-22 07:32:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:44,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171502835] [2020-12-22 07:32:44,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782193912] [2020-12-22 07:32:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:32:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:32:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:45,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:32:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:45,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:45,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:32:45,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136308950] [2020-12-22 07:32:45,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:32:45,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:32:45,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:32:45,656 INFO L87 Difference]: Start difference. First operand 10036 states and 13594 transitions. Second operand 17 states. [2020-12-22 07:32:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:59,241 INFO L93 Difference]: Finished difference Result 109773 states and 147139 transitions. [2020-12-22 07:32:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 07:32:59,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-12-22 07:32:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:59,404 INFO L225 Difference]: With dead ends: 109773 [2020-12-22 07:32:59,405 INFO L226 Difference]: Without dead ends: 100594 [2020-12-22 07:32:59,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3764 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1720, Invalid=8992, Unknown=0, NotChecked=0, Total=10712 [2020-12-22 07:32:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100594 states. [2020-12-22 07:33:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100594 to 50345. [2020-12-22 07:33:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50345 states. [2020-12-22 07:33:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50345 states to 50345 states and 67215 transitions. [2020-12-22 07:33:04,486 INFO L78 Accepts]: Start accepts. Automaton has 50345 states and 67215 transitions. Word has length 81 [2020-12-22 07:33:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:04,487 INFO L481 AbstractCegarLoop]: Abstraction has 50345 states and 67215 transitions. [2020-12-22 07:33:04,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:33:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 50345 states and 67215 transitions. [2020-12-22 07:33:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:33:04,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:04,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:04,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 07:33:04,699 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 970030519, now seen corresponding path program 1 times [2020-12-22 07:33:04,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:04,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182698219] [2020-12-22 07:33:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:04,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182698219] [2020-12-22 07:33:04,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:04,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:04,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143703421] [2020-12-22 07:33:04,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:04,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:04,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:04,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:04,784 INFO L87 Difference]: Start difference. First operand 50345 states and 67215 transitions. Second operand 3 states. [2020-12-22 07:33:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:07,721 INFO L93 Difference]: Finished difference Result 73011 states and 97619 transitions. [2020-12-22 07:33:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:07,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 07:33:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:07,767 INFO L225 Difference]: With dead ends: 73011 [2020-12-22 07:33:07,768 INFO L226 Difference]: Without dead ends: 26727 [2020-12-22 07:33:07,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26727 states. [2020-12-22 07:33:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26727 to 26443. [2020-12-22 07:33:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26443 states. [2020-12-22 07:33:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26443 states to 26443 states and 34582 transitions. [2020-12-22 07:33:10,238 INFO L78 Accepts]: Start accepts. Automaton has 26443 states and 34582 transitions. Word has length 81 [2020-12-22 07:33:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:10,238 INFO L481 AbstractCegarLoop]: Abstraction has 26443 states and 34582 transitions. [2020-12-22 07:33:10,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 26443 states and 34582 transitions. [2020-12-22 07:33:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:33:10,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:10,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:10,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:33:10,242 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:10,243 INFO L82 PathProgramCache]: Analyzing trace with hash 696342807, now seen corresponding path program 1 times [2020-12-22 07:33:10,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:10,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321003526] [2020-12-22 07:33:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:10,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321003526] [2020-12-22 07:33:10,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:10,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:33:10,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092629641] [2020-12-22 07:33:10,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:33:10,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:10,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:33:10,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:10,311 INFO L87 Difference]: Start difference. First operand 26443 states and 34582 transitions. Second operand 3 states. [2020-12-22 07:33:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:12,328 INFO L93 Difference]: Finished difference Result 40701 states and 53415 transitions. [2020-12-22 07:33:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:12,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 07:33:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:12,348 INFO L225 Difference]: With dead ends: 40701 [2020-12-22 07:33:12,348 INFO L226 Difference]: Without dead ends: 17417 [2020-12-22 07:33:12,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17417 states. [2020-12-22 07:33:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17417 to 17415. [2020-12-22 07:33:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17415 states. [2020-12-22 07:33:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17415 states to 17415 states and 22267 transitions. [2020-12-22 07:33:13,953 INFO L78 Accepts]: Start accepts. Automaton has 17415 states and 22267 transitions. Word has length 81 [2020-12-22 07:33:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:13,953 INFO L481 AbstractCegarLoop]: Abstraction has 17415 states and 22267 transitions. [2020-12-22 07:33:13,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 17415 states and 22267 transitions. [2020-12-22 07:33:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:33:13,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:13,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:13,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:33:13,957 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash 336401983, now seen corresponding path program 1 times [2020-12-22 07:33:13,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:13,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732415424] [2020-12-22 07:33:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:33:14,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732415424] [2020-12-22 07:33:14,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:14,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:33:14,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762841331] [2020-12-22 07:33:14,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:33:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:33:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:33:14,072 INFO L87 Difference]: Start difference. First operand 17415 states and 22267 transitions. Second operand 6 states. [2020-12-22 07:33:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:14,995 INFO L93 Difference]: Finished difference Result 25969 states and 33373 transitions. [2020-12-22 07:33:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:33:14,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 07:33:14,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:15,009 INFO L225 Difference]: With dead ends: 25969 [2020-12-22 07:33:15,009 INFO L226 Difference]: Without dead ends: 8682 [2020-12-22 07:33:15,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:33:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2020-12-22 07:33:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 8682. [2020-12-22 07:33:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8682 states. [2020-12-22 07:33:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 11037 transitions. [2020-12-22 07:33:15,783 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 11037 transitions. Word has length 81 [2020-12-22 07:33:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:15,783 INFO L481 AbstractCegarLoop]: Abstraction has 8682 states and 11037 transitions. [2020-12-22 07:33:15,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:33:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 11037 transitions. [2020-12-22 07:33:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:33:15,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:15,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:15,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:33:15,785 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1734457217, now seen corresponding path program 1 times [2020-12-22 07:33:15,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:15,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641389495] [2020-12-22 07:33:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:33:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641389495] [2020-12-22 07:33:15,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:15,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:33:15,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395065931] [2020-12-22 07:33:15,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:33:15,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:33:15,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:33:15,866 INFO L87 Difference]: Start difference. First operand 8682 states and 11037 transitions. Second operand 6 states. [2020-12-22 07:33:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:16,880 INFO L93 Difference]: Finished difference Result 15115 states and 19285 transitions. [2020-12-22 07:33:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:33:16,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 07:33:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:16,890 INFO L225 Difference]: With dead ends: 15115 [2020-12-22 07:33:16,890 INFO L226 Difference]: Without dead ends: 6565 [2020-12-22 07:33:16,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:33:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6565 states. [2020-12-22 07:33:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6565 to 6565. [2020-12-22 07:33:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6565 states. [2020-12-22 07:33:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6565 states to 6565 states and 8259 transitions. [2020-12-22 07:33:17,417 INFO L78 Accepts]: Start accepts. Automaton has 6565 states and 8259 transitions. Word has length 81 [2020-12-22 07:33:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:17,417 INFO L481 AbstractCegarLoop]: Abstraction has 6565 states and 8259 transitions. [2020-12-22 07:33:17,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:33:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6565 states and 8259 transitions. [2020-12-22 07:33:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:33:17,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:17,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:17,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:33:17,420 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:17,420 INFO L82 PathProgramCache]: Analyzing trace with hash -980482721, now seen corresponding path program 1 times [2020-12-22 07:33:17,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:17,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612384413] [2020-12-22 07:33:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 07:33:17,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612384413] [2020-12-22 07:33:17,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:17,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:33:17,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072618689] [2020-12-22 07:33:17,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:33:17,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:33:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:33:17,499 INFO L87 Difference]: Start difference. First operand 6565 states and 8259 transitions. Second operand 6 states. [2020-12-22 07:33:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:18,815 INFO L93 Difference]: Finished difference Result 17035 states and 21695 transitions. [2020-12-22 07:33:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:33:18,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 07:33:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:18,837 INFO L225 Difference]: With dead ends: 17035 [2020-12-22 07:33:18,837 INFO L226 Difference]: Without dead ends: 10538 [2020-12-22 07:33:18,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:33:18,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10538 states. [2020-12-22 07:33:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10538 to 9568. [2020-12-22 07:33:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9568 states. [2020-12-22 07:33:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9568 states to 9568 states and 12062 transitions. [2020-12-22 07:33:19,739 INFO L78 Accepts]: Start accepts. Automaton has 9568 states and 12062 transitions. Word has length 81 [2020-12-22 07:33:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:19,739 INFO L481 AbstractCegarLoop]: Abstraction has 9568 states and 12062 transitions. [2020-12-22 07:33:19,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:33:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 9568 states and 12062 transitions. [2020-12-22 07:33:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:33:19,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:19,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:19,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:33:19,742 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1098414210, now seen corresponding path program 1 times [2020-12-22 07:33:19,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:19,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829205870] [2020-12-22 07:33:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:19,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829205870] [2020-12-22 07:33:20,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743927176] [2020-12-22 07:33:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 07:33:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:20,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:33:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:20,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:20,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:33:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277966223] [2020-12-22 07:33:20,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:33:20,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:33:20,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:33:20,655 INFO L87 Difference]: Start difference. First operand 9568 states and 12062 transitions. Second operand 17 states. [2020-12-22 07:33:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:25,717 INFO L93 Difference]: Finished difference Result 46981 states and 58798 transitions. [2020-12-22 07:33:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 07:33:25,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 07:33:25,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:25,763 INFO L225 Difference]: With dead ends: 46981 [2020-12-22 07:33:25,763 INFO L226 Difference]: Without dead ends: 38955 [2020-12-22 07:33:25,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 07:33:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38955 states. [2020-12-22 07:33:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38955 to 24189. [2020-12-22 07:33:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24189 states. [2020-12-22 07:33:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24189 states to 24189 states and 30448 transitions. [2020-12-22 07:33:28,404 INFO L78 Accepts]: Start accepts. Automaton has 24189 states and 30448 transitions. Word has length 82 [2020-12-22 07:33:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:28,404 INFO L481 AbstractCegarLoop]: Abstraction has 24189 states and 30448 transitions. [2020-12-22 07:33:28,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:33:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 24189 states and 30448 transitions. [2020-12-22 07:33:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:33:28,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:28,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:28,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 07:33:28,623 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:28,624 INFO L82 PathProgramCache]: Analyzing trace with hash 201020932, now seen corresponding path program 1 times [2020-12-22 07:33:28,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:28,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41841153] [2020-12-22 07:33:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:33:28,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41841153] [2020-12-22 07:33:28,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:28,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:33:28,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725950367] [2020-12-22 07:33:28,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:28,756 INFO L87 Difference]: Start difference. First operand 24189 states and 30448 transitions. Second operand 7 states. [2020-12-22 07:33:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:31,590 INFO L93 Difference]: Finished difference Result 50229 states and 63401 transitions. [2020-12-22 07:33:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:33:31,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-12-22 07:33:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:31,624 INFO L225 Difference]: With dead ends: 50229 [2020-12-22 07:33:31,625 INFO L226 Difference]: Without dead ends: 26272 [2020-12-22 07:33:31,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:33:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26272 states. [2020-12-22 07:33:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26272 to 26270. [2020-12-22 07:33:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26270 states. [2020-12-22 07:33:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26270 states to 26270 states and 32934 transitions. [2020-12-22 07:33:34,447 INFO L78 Accepts]: Start accepts. Automaton has 26270 states and 32934 transitions. Word has length 82 [2020-12-22 07:33:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:34,447 INFO L481 AbstractCegarLoop]: Abstraction has 26270 states and 32934 transitions. [2020-12-22 07:33:34,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:33:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 26270 states and 32934 transitions. [2020-12-22 07:33:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:33:34,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:34,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:33:34,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:33:34,450 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2091708008, now seen corresponding path program 1 times [2020-12-22 07:33:34,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:34,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694917662] [2020-12-22 07:33:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:36,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694917662] [2020-12-22 07:33:36,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141109802] [2020-12-22 07:33:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:33:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:36,713 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:33:37,151 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2020-12-22 07:33:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:37,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:37,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13] total 39 [2020-12-22 07:33:37,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707270218] [2020-12-22 07:33:37,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 07:33:37,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 07:33:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 07:33:37,754 INFO L87 Difference]: Start difference. First operand 26270 states and 32934 transitions. Second operand 39 states. [2020-12-22 07:33:38,258 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2020-12-22 07:33:39,301 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 07:33:39,507 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 07:33:39,737 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-12-22 07:33:40,085 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 07:33:40,627 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 07:33:40,947 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 07:33:41,313 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-12-22 07:33:41,687 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 07:33:42,102 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 07:33:42,518 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 07:33:43,034 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-12-22 07:33:43,690 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 96 [2020-12-22 07:33:44,135 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-12-22 07:33:44,594 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-12-22 07:33:44,956 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 07:33:45,305 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-12-22 07:33:45,601 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 07:33:45,876 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 07:33:46,193 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 07:33:46,487 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 07:33:46,957 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 07:33:47,483 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-22 07:33:47,943 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 07:33:48,516 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 07:33:49,655 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-22 07:33:50,764 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 07:33:52,390 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-12-22 07:33:52,648 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-12-22 07:33:52,871 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 07:33:53,145 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 07:33:53,451 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 07:33:53,805 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 07:33:54,015 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 07:33:54,249 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 07:33:54,478 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 07:33:54,807 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 07:33:55,260 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 07:33:55,629 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 07:33:56,166 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 07:34:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:00,881 INFO L93 Difference]: Finished difference Result 57888 states and 74183 transitions. [2020-12-22 07:34:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 07:34:00,883 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 07:34:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:00,930 INFO L225 Difference]: With dead ends: 57888 [2020-12-22 07:34:00,930 INFO L226 Difference]: Without dead ends: 44052 [2020-12-22 07:34:00,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1324, Invalid=7796, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 07:34:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44052 states. [2020-12-22 07:34:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44052 to 17385. [2020-12-22 07:34:03,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17385 states. [2020-12-22 07:34:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17385 states to 17385 states and 22104 transitions. [2020-12-22 07:34:03,158 INFO L78 Accepts]: Start accepts. Automaton has 17385 states and 22104 transitions. Word has length 83 [2020-12-22 07:34:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:03,158 INFO L481 AbstractCegarLoop]: Abstraction has 17385 states and 22104 transitions. [2020-12-22 07:34:03,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 07:34:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17385 states and 22104 transitions. [2020-12-22 07:34:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:34:03,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:03,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:03,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:34:03,377 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -441022536, now seen corresponding path program 1 times [2020-12-22 07:34:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:03,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178650721] [2020-12-22 07:34:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:05,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178650721] [2020-12-22 07:34:05,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711752762] [2020-12-22 07:34:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:34:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 07:34:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:34:07,179 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-12-22 07:34:08,142 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 07:34:08,720 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 07:34:09,358 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 07:34:10,525 WARN L197 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-12-22 07:34:10,576 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 07:34:11,937 WARN L197 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 70 [2020-12-22 07:34:11,959 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 07:34:11,984 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 07:34:12,195 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:12,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 22 disjuncts [2020-12-22 07:34:12,484 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:13,161 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:14,029 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:15,549 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:17,321 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:19,201 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:21,460 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:24,180 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:27,407 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:31,208 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:35,607 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:34:36,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 07:34:36,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 07:34:36,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-22 07:34:36,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424717062] [2020-12-22 07:34:36,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 07:34:36,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 07:34:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 07:34:36,410 INFO L87 Difference]: Start difference. First operand 17385 states and 22104 transitions. Second operand 29 states. [2020-12-22 07:34:36,873 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-12-22 07:34:37,798 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 07:34:38,137 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 07:34:38,379 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 07:34:38,640 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-22 07:34:38,926 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 07:34:39,276 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-12-22 07:34:39,633 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-12-22 07:34:40,079 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-12-22 07:34:40,526 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-12-22 07:34:40,754 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 07:34:40,999 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 07:34:41,925 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 07:34:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:46,923 INFO L93 Difference]: Finished difference Result 37183 states and 48090 transitions. [2020-12-22 07:34:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 07:34:46,924 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2020-12-22 07:34:46,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:46,963 INFO L225 Difference]: With dead ends: 37183 [2020-12-22 07:34:46,963 INFO L226 Difference]: Without dead ends: 34107 [2020-12-22 07:34:46,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=742, Invalid=5738, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 07:34:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34107 states. [2020-12-22 07:34:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34107 to 17367. [2020-12-22 07:34:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17367 states. [2020-12-22 07:34:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17367 states to 17367 states and 22081 transitions. [2020-12-22 07:34:49,118 INFO L78 Accepts]: Start accepts. Automaton has 17367 states and 22081 transitions. Word has length 83 [2020-12-22 07:34:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:49,118 INFO L481 AbstractCegarLoop]: Abstraction has 17367 states and 22081 transitions. [2020-12-22 07:34:49,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 07:34:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 17367 states and 22081 transitions. [2020-12-22 07:34:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:34:49,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:49,120 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:49,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 07:34:49,331 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash 489273275, now seen corresponding path program 1 times [2020-12-22 07:34:49,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:49,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225673504] [2020-12-22 07:34:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:51,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225673504] [2020-12-22 07:34:51,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078112615] [2020-12-22 07:34:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:34:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:34:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:34:52,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:34:52,419 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-12-22 07:34:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:53,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:34:53,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 07:34:53,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795056162] [2020-12-22 07:34:53,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 07:34:53,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 07:34:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 07:34:53,013 INFO L87 Difference]: Start difference. First operand 17367 states and 22081 transitions. Second operand 40 states. [2020-12-22 07:34:53,634 WARN L197 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 100 [2020-12-22 07:34:54,411 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2020-12-22 07:34:54,632 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 07:34:54,831 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-12-22 07:34:55,035 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-12-22 07:34:55,274 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-12-22 07:34:55,689 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-12-22 07:34:56,003 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-12-22 07:34:56,357 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-12-22 07:34:56,774 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-12-22 07:34:57,168 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-12-22 07:34:57,690 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2020-12-22 07:34:58,323 WARN L197 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2020-12-22 07:34:59,093 WARN L197 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 104 [2020-12-22 07:34:59,929 WARN L197 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 98 [2020-12-22 07:35:00,370 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-12-22 07:35:00,809 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-12-22 07:35:01,169 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-12-22 07:35:01,486 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-12-22 07:35:01,798 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-12-22 07:35:02,017 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 07:35:02,421 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-12-22 07:35:02,704 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-12-22 07:35:03,125 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-12-22 07:35:03,416 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 07:35:03,920 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-12-22 07:35:04,258 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2020-12-22 07:35:04,601 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 07:35:04,937 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 07:35:05,166 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-22 07:35:05,530 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-12-22 07:35:07,181 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 07:35:07,412 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-12-22 07:35:07,875 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-22 07:35:08,260 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 07:35:08,506 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 07:35:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:15,289 INFO L93 Difference]: Finished difference Result 52854 states and 68341 transitions. [2020-12-22 07:35:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 07:35:15,291 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 83 [2020-12-22 07:35:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:15,336 INFO L225 Difference]: With dead ends: 52854 [2020-12-22 07:35:15,336 INFO L226 Difference]: Without dead ends: 45077 [2020-12-22 07:35:15,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1066, Invalid=5906, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 07:35:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45077 states. [2020-12-22 07:35:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45077 to 15755. [2020-12-22 07:35:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15755 states. [2020-12-22 07:35:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15755 states to 15755 states and 20096 transitions. [2020-12-22 07:35:17,554 INFO L78 Accepts]: Start accepts. Automaton has 15755 states and 20096 transitions. Word has length 83 [2020-12-22 07:35:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:17,554 INFO L481 AbstractCegarLoop]: Abstraction has 15755 states and 20096 transitions. [2020-12-22 07:35:17,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 07:35:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 15755 states and 20096 transitions. [2020-12-22 07:35:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:35:17,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:17,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:17,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 07:35:17,771 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash -15090348, now seen corresponding path program 1 times [2020-12-22 07:35:17,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:17,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846006600] [2020-12-22 07:35:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:18,389 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 07:35:18,660 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 07:35:18,834 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-12-22 07:35:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:19,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846006600] [2020-12-22 07:35:19,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005116690] [2020-12-22 07:35:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:35:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:19,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:35:19,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:20,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:35:20,538 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-22 07:35:21,284 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-22 07:35:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:21,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:35:21,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-22 07:35:21,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133292877] [2020-12-22 07:35:21,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 07:35:21,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:21,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 07:35:21,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-12-22 07:35:21,371 INFO L87 Difference]: Start difference. First operand 15755 states and 20096 transitions. Second operand 30 states. [2020-12-22 07:35:21,555 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 07:35:22,661 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-12-22 07:35:23,130 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-22 07:35:23,615 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-22 07:35:23,898 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 07:35:24,212 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 07:35:24,678 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-12-22 07:35:25,210 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 07:35:25,819 WARN L197 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2020-12-22 07:35:26,418 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-12-22 07:35:26,887 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-12-22 07:35:27,375 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-12-22 07:35:27,952 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 07:35:28,176 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 07:35:28,424 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-22 07:35:28,818 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 07:35:30,282 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 07:35:30,693 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 07:35:31,561 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 07:35:31,806 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-22 07:35:34,143 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 07:35:34,351 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 07:35:34,581 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 07:35:34,949 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 07:35:35,250 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 07:35:35,574 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-12-22 07:35:35,804 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 07:35:35,986 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 07:35:36,180 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 07:35:36,505 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-12-22 07:35:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:39,745 INFO L93 Difference]: Finished difference Result 27933 states and 35851 transitions. [2020-12-22 07:35:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 07:35:39,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 84 [2020-12-22 07:35:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:39,769 INFO L225 Difference]: With dead ends: 27933 [2020-12-22 07:35:39,769 INFO L226 Difference]: Without dead ends: 19528 [2020-12-22 07:35:39,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=779, Invalid=5227, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 07:35:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19528 states. [2020-12-22 07:35:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19528 to 13376. [2020-12-22 07:35:42,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13376 states. [2020-12-22 07:35:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 17142 transitions. [2020-12-22 07:35:42,115 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 17142 transitions. Word has length 84 [2020-12-22 07:35:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:42,116 INFO L481 AbstractCegarLoop]: Abstraction has 13376 states and 17142 transitions. [2020-12-22 07:35:42,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 07:35:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 17142 transitions. [2020-12-22 07:35:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 07:35:42,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:42,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:42,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 07:35:42,318 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:42,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash 297950385, now seen corresponding path program 1 times [2020-12-22 07:35:42,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:42,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116046445] [2020-12-22 07:35:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:42,694 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-12-22 07:35:42,936 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-22 07:35:43,255 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 07:35:43,417 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 07:35:43,600 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-12-22 07:35:43,765 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 07:35:43,939 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-12-22 07:35:44,115 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-12-22 07:35:44,298 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-12-22 07:35:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116046445] [2020-12-22 07:35:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322984075] [2020-12-22 07:35:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:35:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 07:35:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:46,161 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 07:35:47,421 WARN L197 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 57 [2020-12-22 07:35:47,855 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 07:35:48,662 WARN L197 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 07:35:49,225 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 07:35:49,941 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 07:35:50,497 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-12-22 07:35:50,509 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts