/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/eca-rers2012/Problem17_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:34:43,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:34:43,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:34:43,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:34:43,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:34:43,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:34:43,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:34:43,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:34:43,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:34:43,885 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:34:43,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:34:43,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:34:43,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:34:43,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:34:43,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:34:43,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:34:43,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:34:43,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:34:43,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:34:43,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:34:43,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:34:43,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:34:43,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:34:43,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:34:43,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:34:43,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:34:43,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:34:43,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:34:43,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:34:43,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:34:43,893 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:34:44,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:34:44,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:34:44,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:34:44,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:34:44,452 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:34:44,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label53.c [2020-12-22 02:34:44,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d86ff3f/adb1cf41356144c599be3a4ca5948331/FLAG976c4c534 [2020-12-22 02:34:45,780 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:34:45,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label53.c [2020-12-22 02:34:45,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d86ff3f/adb1cf41356144c599be3a4ca5948331/FLAG976c4c534 [2020-12-22 02:34:46,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d86ff3f/adb1cf41356144c599be3a4ca5948331 [2020-12-22 02:34:46,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:34:46,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:34:46,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:34:46,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:34:46,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:34:46,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:34:46" (1/1) ... [2020-12-22 02:34:46,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d84870c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:46, skipping insertion in model container [2020-12-22 02:34:46,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:34:46" (1/1) ... [2020-12-22 02:34:46,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:34:46,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:34:46,581 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/eca-rers2012/Problem17_label53.c[2227,2240] [2020-12-22 02:34:47,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:34:47,688 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:34:47,734 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/eca-rers2012/Problem17_label53.c[2227,2240] [2020-12-22 02:34:48,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:34:48,340 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:34:48,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48 WrapperNode [2020-12-22 02:34:48,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:34:48,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:34:48,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:34:48,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:34:48,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:48,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:48,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:34:48,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:34:48,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:34:48,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:34:48,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:48,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:48,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:48,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:49,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:49,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:49,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (1/1) ... [2020-12-22 02:34:49,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:34:49,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:34:49,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:34:49,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:34:49,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (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 02:34:49,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:34:49,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:34:49,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:34:49,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:34:54,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:34:54,112 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:34:54,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:34:54 BoogieIcfgContainer [2020-12-22 02:34:54,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:34:54,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:34:54,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:34:54,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:34:54,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:34:46" (1/3) ... [2020-12-22 02:34:54,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b5e3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:34:54, skipping insertion in model container [2020-12-22 02:34:54,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:34:48" (2/3) ... [2020-12-22 02:34:54,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b5e3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:34:54, skipping insertion in model container [2020-12-22 02:34:54,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:34:54" (3/3) ... [2020-12-22 02:34:54,136 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label53.c [2020-12-22 02:34:54,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:34:54,153 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:34:54,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:34:54,233 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:34:54,233 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:34:54,234 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:34:54,234 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:34:54,234 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:34:54,234 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:34:54,234 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:34:54,234 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:34:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-12-22 02:34:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 02:34:54,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:54,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:34:54,289 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1414013846, now seen corresponding path program 1 times [2020-12-22 02:34:54,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:54,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743212558] [2020-12-22 02:34:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:54,643 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 02:34:54,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743212558] [2020-12-22 02:34:54,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:54,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:34:54,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111171500] [2020-12-22 02:34:54,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:34:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:34:54,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:54,682 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2020-12-22 02:34:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:59,792 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2020-12-22 02:34:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:34:59,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 02:34:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:59,829 INFO L225 Difference]: With dead ends: 1667 [2020-12-22 02:34:59,829 INFO L226 Difference]: Without dead ends: 998 [2020-12-22 02:34:59,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-12-22 02:34:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2020-12-22 02:34:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-12-22 02:34:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2020-12-22 02:34:59,974 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 14 [2020-12-22 02:34:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:59,974 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2020-12-22 02:34:59,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:34:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2020-12-22 02:34:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 02:34:59,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:59,979 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 02:34:59,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:34:59,980 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash 731005735, now seen corresponding path program 1 times [2020-12-22 02:34:59,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:59,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346788540] [2020-12-22 02:34:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:35:00,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346788540] [2020-12-22 02:35:00,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:00,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:35:00,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180182514] [2020-12-22 02:35:00,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:00,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:00,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:00,311 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand 3 states. [2020-12-22 02:35:05,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:05,497 INFO L93 Difference]: Finished difference Result 2840 states and 4882 transitions. [2020-12-22 02:35:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:05,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 02:35:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:05,509 INFO L225 Difference]: With dead ends: 2840 [2020-12-22 02:35:05,509 INFO L226 Difference]: Without dead ends: 1860 [2020-12-22 02:35:05,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2020-12-22 02:35:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1854. [2020-12-22 02:35:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1854 states. [2020-12-22 02:35:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2759 transitions. [2020-12-22 02:35:05,603 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2759 transitions. Word has length 79 [2020-12-22 02:35:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:05,604 INFO L481 AbstractCegarLoop]: Abstraction has 1854 states and 2759 transitions. [2020-12-22 02:35:05,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2759 transitions. [2020-12-22 02:35:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 02:35:05,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:05,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:35:05,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:35:05,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1804356786, now seen corresponding path program 1 times [2020-12-22 02:35:05,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:05,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027451975] [2020-12-22 02:35:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:35:05,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027451975] [2020-12-22 02:35:05,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:05,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:35:05,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507086816] [2020-12-22 02:35:05,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:05,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:05,863 INFO L87 Difference]: Start difference. First operand 1854 states and 2759 transitions. Second operand 3 states. [2020-12-22 02:35:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:10,034 INFO L93 Difference]: Finished difference Result 5418 states and 8069 transitions. [2020-12-22 02:35:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:10,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-22 02:35:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:10,056 INFO L225 Difference]: With dead ends: 5418 [2020-12-22 02:35:10,056 INFO L226 Difference]: Without dead ends: 3566 [2020-12-22 02:35:10,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2020-12-22 02:35:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3138. [2020-12-22 02:35:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3138 states. [2020-12-22 02:35:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 4061 transitions. [2020-12-22 02:35:10,144 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 4061 transitions. Word has length 89 [2020-12-22 02:35:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:10,145 INFO L481 AbstractCegarLoop]: Abstraction has 3138 states and 4061 transitions. [2020-12-22 02:35:10,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 4061 transitions. [2020-12-22 02:35:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 02:35:10,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:10,150 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:35:10,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:35:10,150 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash -757209897, now seen corresponding path program 1 times [2020-12-22 02:35:10,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:10,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517388365] [2020-12-22 02:35:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:35:10,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517388365] [2020-12-22 02:35:10,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:10,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:35:10,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77898876] [2020-12-22 02:35:10,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:10,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:10,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:10,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:10,450 INFO L87 Difference]: Start difference. First operand 3138 states and 4061 transitions. Second operand 3 states. [2020-12-22 02:35:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:14,888 INFO L93 Difference]: Finished difference Result 7984 states and 10671 transitions. [2020-12-22 02:35:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:14,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-12-22 02:35:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:14,919 INFO L225 Difference]: With dead ends: 7984 [2020-12-22 02:35:14,919 INFO L226 Difference]: Without dead ends: 4848 [2020-12-22 02:35:14,926 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 02:35:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2020-12-22 02:35:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4848. [2020-12-22 02:35:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4848 states. [2020-12-22 02:35:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 6226 transitions. [2020-12-22 02:35:15,073 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 6226 transitions. Word has length 162 [2020-12-22 02:35:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:15,074 INFO L481 AbstractCegarLoop]: Abstraction has 4848 states and 6226 transitions. [2020-12-22 02:35:15,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 6226 transitions. [2020-12-22 02:35:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 02:35:15,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:15,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:35:15,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:35:15,079 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:15,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2098323832, now seen corresponding path program 1 times [2020-12-22 02:35:15,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:15,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846450367] [2020-12-22 02:35:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:35:15,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846450367] [2020-12-22 02:35:15,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257271159] [2020-12-22 02:35:15,385 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 02:35:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:35:15,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:35:15,812 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:35:15,849 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:35:16,106 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:35:16,334 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:35:16,590 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 02:35:16,682 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:35:16,816 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:35:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:35:17,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:35:17,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-22 02:35:17,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978134699] [2020-12-22 02:35:17,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:35:17,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:35:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:17,944 INFO L87 Difference]: Start difference. First operand 4848 states and 6226 transitions. Second operand 4 states. [2020-12-22 02:35:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:26,211 INFO L93 Difference]: Finished difference Result 13959 states and 17991 transitions. [2020-12-22 02:35:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:35:26,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-12-22 02:35:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:26,253 INFO L225 Difference]: With dead ends: 13959 [2020-12-22 02:35:26,254 INFO L226 Difference]: Without dead ends: 8263 [2020-12-22 02:35:26,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2020-12-22 02:35:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 8260. [2020-12-22 02:35:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8260 states. [2020-12-22 02:35:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8260 states to 8260 states and 9868 transitions. [2020-12-22 02:35:26,442 INFO L78 Accepts]: Start accepts. Automaton has 8260 states and 9868 transitions. Word has length 168 [2020-12-22 02:35:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:26,443 INFO L481 AbstractCegarLoop]: Abstraction has 8260 states and 9868 transitions. [2020-12-22 02:35:26,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:35:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 8260 states and 9868 transitions. [2020-12-22 02:35:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 02:35:26,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:26,448 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:35:26,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:35:26,664 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:26,664 INFO L82 PathProgramCache]: Analyzing trace with hash 274294868, now seen corresponding path program 1 times [2020-12-22 02:35:26,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:26,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563557736] [2020-12-22 02:35:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 02:35:26,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563557736] [2020-12-22 02:35:26,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:26,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:35:26,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243732789] [2020-12-22 02:35:26,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:26,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:26,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:26,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:26,984 INFO L87 Difference]: Start difference. First operand 8260 states and 9868 transitions. Second operand 3 states. [2020-12-22 02:35:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:32,272 INFO L93 Difference]: Finished difference Result 19930 states and 24241 transitions. [2020-12-22 02:35:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:32,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2020-12-22 02:35:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:32,330 INFO L225 Difference]: With dead ends: 19930 [2020-12-22 02:35:32,331 INFO L226 Difference]: Without dead ends: 11244 [2020-12-22 02:35:32,344 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 02:35:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11244 states. [2020-12-22 02:35:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11244 to 11242. [2020-12-22 02:35:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11242 states. [2020-12-22 02:35:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11242 states to 11242 states and 12757 transitions. [2020-12-22 02:35:32,586 INFO L78 Accepts]: Start accepts. Automaton has 11242 states and 12757 transitions. Word has length 238 [2020-12-22 02:35:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:32,587 INFO L481 AbstractCegarLoop]: Abstraction has 11242 states and 12757 transitions. [2020-12-22 02:35:32,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 11242 states and 12757 transitions. [2020-12-22 02:35:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-12-22 02:35:32,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:32,593 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:35:32,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:35:32,593 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1322115594, now seen corresponding path program 1 times [2020-12-22 02:35:32,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:32,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668610599] [2020-12-22 02:35:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:35:32,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668610599] [2020-12-22 02:35:32,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:32,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:35:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617959196] [2020-12-22 02:35:32,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:32,853 INFO L87 Difference]: Start difference. First operand 11242 states and 12757 transitions. Second operand 3 states. [2020-12-22 02:35:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:38,652 INFO L93 Difference]: Finished difference Result 28051 states and 32132 transitions. [2020-12-22 02:35:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:38,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2020-12-22 02:35:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:38,694 INFO L225 Difference]: With dead ends: 28051 [2020-12-22 02:35:38,695 INFO L226 Difference]: Without dead ends: 15938 [2020-12-22 02:35:38,712 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 02:35:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15938 states. [2020-12-22 02:35:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15938 to 15507. [2020-12-22 02:35:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15507 states. [2020-12-22 02:35:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15507 states to 15507 states and 17484 transitions. [2020-12-22 02:35:38,993 INFO L78 Accepts]: Start accepts. Automaton has 15507 states and 17484 transitions. Word has length 273 [2020-12-22 02:35:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:38,994 INFO L481 AbstractCegarLoop]: Abstraction has 15507 states and 17484 transitions. [2020-12-22 02:35:38,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 15507 states and 17484 transitions. [2020-12-22 02:35:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-12-22 02:35:39,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:39,003 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-12-22 02:35:39,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:35:39,004 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash -91274060, now seen corresponding path program 1 times [2020-12-22 02:35:39,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:39,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644534482] [2020-12-22 02:35:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-22 02:35:39,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644534482] [2020-12-22 02:35:39,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:39,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:35:39,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412614138] [2020-12-22 02:35:39,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:39,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:39,607 INFO L87 Difference]: Start difference. First operand 15507 states and 17484 transitions. Second operand 3 states. [2020-12-22 02:35:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:44,523 INFO L93 Difference]: Finished difference Result 37018 states and 41966 transitions. [2020-12-22 02:35:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:44,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-12-22 02:35:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:44,577 INFO L225 Difference]: With dead ends: 37018 [2020-12-22 02:35:44,577 INFO L226 Difference]: Without dead ends: 21938 [2020-12-22 02:35:44,602 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 02:35:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21938 states. [2020-12-22 02:35:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21938 to 21054. [2020-12-22 02:35:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21054 states. [2020-12-22 02:35:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21054 states to 21054 states and 23898 transitions. [2020-12-22 02:35:45,033 INFO L78 Accepts]: Start accepts. Automaton has 21054 states and 23898 transitions. Word has length 347 [2020-12-22 02:35:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:45,034 INFO L481 AbstractCegarLoop]: Abstraction has 21054 states and 23898 transitions. [2020-12-22 02:35:45,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21054 states and 23898 transitions. [2020-12-22 02:35:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-12-22 02:35:45,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:45,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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 02:35:45,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:35:45,044 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1534862679, now seen corresponding path program 1 times [2020-12-22 02:35:45,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:45,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789452718] [2020-12-22 02:35:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-22 02:35:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789452718] [2020-12-22 02:35:45,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:45,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:35:45,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645094622] [2020-12-22 02:35:45,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:45,375 INFO L87 Difference]: Start difference. First operand 21054 states and 23898 transitions. Second operand 3 states. [2020-12-22 02:35:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:50,512 INFO L93 Difference]: Finished difference Result 48952 states and 56224 transitions. [2020-12-22 02:35:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:50,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-12-22 02:35:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:50,570 INFO L225 Difference]: With dead ends: 48952 [2020-12-22 02:35:50,570 INFO L226 Difference]: Without dead ends: 27895 [2020-12-22 02:35:50,593 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 02:35:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27895 states. [2020-12-22 02:35:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27895 to 27890. [2020-12-22 02:35:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27890 states. [2020-12-22 02:35:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27890 states to 27890 states and 31901 transitions. [2020-12-22 02:35:50,967 INFO L78 Accepts]: Start accepts. Automaton has 27890 states and 31901 transitions. Word has length 348 [2020-12-22 02:35:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:50,968 INFO L481 AbstractCegarLoop]: Abstraction has 27890 states and 31901 transitions. [2020-12-22 02:35:50,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 27890 states and 31901 transitions. [2020-12-22 02:35:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-12-22 02:35:50,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:50,978 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:35:50,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:35:50,978 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2016019680, now seen corresponding path program 1 times [2020-12-22 02:35:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:50,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415514361] [2020-12-22 02:35:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 02:35:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415514361] [2020-12-22 02:35:51,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:51,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:35:51,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181697515] [2020-12-22 02:35:51,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:35:51,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:51,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:35:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:51,413 INFO L87 Difference]: Start difference. First operand 27890 states and 31901 transitions. Second operand 4 states. [2020-12-22 02:35:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:58,743 INFO L93 Difference]: Finished difference Result 72835 states and 83471 transitions. [2020-12-22 02:35:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:35:58,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 352 [2020-12-22 02:35:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:58,790 INFO L225 Difference]: With dead ends: 72835 [2020-12-22 02:35:58,790 INFO L226 Difference]: Without dead ends: 45372 [2020-12-22 02:35:58,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45372 states. [2020-12-22 02:35:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45372 to 41525. [2020-12-22 02:35:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41525 states. [2020-12-22 02:35:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41525 states to 41525 states and 47664 transitions. [2020-12-22 02:35:59,503 INFO L78 Accepts]: Start accepts. Automaton has 41525 states and 47664 transitions. Word has length 352 [2020-12-22 02:35:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:59,504 INFO L481 AbstractCegarLoop]: Abstraction has 41525 states and 47664 transitions. [2020-12-22 02:35:59,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:35:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 41525 states and 47664 transitions. [2020-12-22 02:35:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-12-22 02:35:59,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:59,510 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-12-22 02:35:59,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:35:59,510 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -426936410, now seen corresponding path program 1 times [2020-12-22 02:35:59,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:59,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088778543] [2020-12-22 02:35:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 311 proven. 82 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 02:36:00,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088778543] [2020-12-22 02:36:00,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409471237] [2020-12-22 02:36:00,459 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 02:36:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 02:36:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:36:00,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:36:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 311 proven. 82 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 02:36:01,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:36:01,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 02:36:01,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540467639] [2020-12-22 02:36:01,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:36:01,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:36:01,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:36:01,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:36:01,738 INFO L87 Difference]: Start difference. First operand 41525 states and 47664 transitions. Second operand 7 states. [2020-12-22 02:36:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:36:10,729 INFO L93 Difference]: Finished difference Result 83319 states and 95606 transitions. [2020-12-22 02:36:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:36:10,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 367 [2020-12-22 02:36:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:36:10,771 INFO L225 Difference]: With dead ends: 83319 [2020-12-22 02:36:10,772 INFO L226 Difference]: Without dead ends: 42221 [2020-12-22 02:36:10,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:36:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42221 states. [2020-12-22 02:36:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42221 to 41950. [2020-12-22 02:36:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41950 states. [2020-12-22 02:36:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41950 states to 41950 states and 48092 transitions. [2020-12-22 02:36:11,711 INFO L78 Accepts]: Start accepts. Automaton has 41950 states and 48092 transitions. Word has length 367 [2020-12-22 02:36:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:36:11,712 INFO L481 AbstractCegarLoop]: Abstraction has 41950 states and 48092 transitions. [2020-12-22 02:36:11,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:36:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 41950 states and 48092 transitions. [2020-12-22 02:36:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-12-22 02:36:11,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:36:11,833 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:36:12,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:36:12,034 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:36:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:36:12,036 INFO L82 PathProgramCache]: Analyzing trace with hash -473674346, now seen corresponding path program 1 times [2020-12-22 02:36:12,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:36:12,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458938180] [2020-12-22 02:36:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:36:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 551 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-12-22 02:36:12,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458938180] [2020-12-22 02:36:12,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:36:12,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:36:12,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105740872] [2020-12-22 02:36:12,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:36:12,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:36:12,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:36:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:36:12,488 INFO L87 Difference]: Start difference. First operand 41950 states and 48092 transitions. Second operand 3 states. [2020-12-22 02:36:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:36:17,712 INFO L93 Difference]: Finished difference Result 102671 states and 117896 transitions. [2020-12-22 02:36:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:36:17,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 427 [2020-12-22 02:36:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:36:17,786 INFO L225 Difference]: With dead ends: 102671 [2020-12-22 02:36:17,786 INFO L226 Difference]: Without dead ends: 61571 [2020-12-22 02:36:17,813 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 02:36:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61571 states. [2020-12-22 02:36:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61571 to 58549. [2020-12-22 02:36:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58549 states. [2020-12-22 02:36:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58549 states to 58549 states and 65780 transitions. [2020-12-22 02:36:19,092 INFO L78 Accepts]: Start accepts. Automaton has 58549 states and 65780 transitions. Word has length 427 [2020-12-22 02:36:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:36:19,095 INFO L481 AbstractCegarLoop]: Abstraction has 58549 states and 65780 transitions. [2020-12-22 02:36:19,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:36:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 58549 states and 65780 transitions. [2020-12-22 02:36:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-12-22 02:36:19,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:36:19,105 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:36:19,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:36:19,105 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:36:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:36:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1546176435, now seen corresponding path program 1 times [2020-12-22 02:36:19,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:36:19,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673974333] [2020-12-22 02:36:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:36:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 632 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 02:36:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673974333] [2020-12-22 02:36:19,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:36:19,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:36:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533702172] [2020-12-22 02:36:19,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:36:19,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:36:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:36:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:36:19,758 INFO L87 Difference]: Start difference. First operand 58549 states and 65780 transitions. Second operand 3 states. [2020-12-22 02:36:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:36:25,234 INFO L93 Difference]: Finished difference Result 131587 states and 147637 transitions. [2020-12-22 02:36:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:36:25,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 449 [2020-12-22 02:36:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:36:25,325 INFO L225 Difference]: With dead ends: 131587 [2020-12-22 02:36:25,325 INFO L226 Difference]: Without dead ends: 73890 [2020-12-22 02:36:25,351 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 02:36:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73890 states. [2020-12-22 02:36:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73890 to 72587. [2020-12-22 02:36:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72587 states. [2020-12-22 02:36:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72587 states to 72587 states and 80591 transitions. [2020-12-22 02:36:26,584 INFO L78 Accepts]: Start accepts. Automaton has 72587 states and 80591 transitions. Word has length 449 [2020-12-22 02:36:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:36:26,585 INFO L481 AbstractCegarLoop]: Abstraction has 72587 states and 80591 transitions. [2020-12-22 02:36:26,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:36:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 72587 states and 80591 transitions. [2020-12-22 02:36:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-12-22 02:36:26,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:36:26,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:36:26,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:36:26,601 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:36:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:36:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1002503559, now seen corresponding path program 1 times [2020-12-22 02:36:26,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:36:26,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293868120] [2020-12-22 02:36:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:36:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-12-22 02:36:27,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293868120] [2020-12-22 02:36:27,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:36:27,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:36:27,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739932847] [2020-12-22 02:36:27,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:36:27,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:36:27,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:36:27,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:36:27,190 INFO L87 Difference]: Start difference. First operand 72587 states and 80591 transitions. Second operand 3 states. [2020-12-22 02:36:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:36:32,274 INFO L93 Difference]: Finished difference Result 147744 states and 163999 transitions. [2020-12-22 02:36:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:36:32,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 461 [2020-12-22 02:36:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:36:32,353 INFO L225 Difference]: With dead ends: 147744 [2020-12-22 02:36:32,353 INFO L226 Difference]: Without dead ends: 76009 [2020-12-22 02:36:32,385 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 02:36:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76009 states. [2020-12-22 02:36:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76009 to 75997. [2020-12-22 02:36:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75997 states. [2020-12-22 02:36:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75997 states to 75997 states and 84095 transitions. [2020-12-22 02:36:33,609 INFO L78 Accepts]: Start accepts. Automaton has 75997 states and 84095 transitions. Word has length 461 [2020-12-22 02:36:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:36:33,610 INFO L481 AbstractCegarLoop]: Abstraction has 75997 states and 84095 transitions. [2020-12-22 02:36:33,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:36:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 75997 states and 84095 transitions. [2020-12-22 02:36:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-12-22 02:36:33,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:36:33,619 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:36:33,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:36:33,619 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:36:33,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:36:33,620 INFO L82 PathProgramCache]: Analyzing trace with hash 637760447, now seen corresponding path program 1 times [2020-12-22 02:36:33,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:36:33,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869843751] [2020-12-22 02:36:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:36:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2020-12-22 02:36:34,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869843751] [2020-12-22 02:36:34,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:36:34,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:36:34,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725753386] [2020-12-22 02:36:34,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:36:34,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:36:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:36:34,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:36:34,342 INFO L87 Difference]: Start difference. First operand 75997 states and 84095 transitions. Second operand 3 states. [2020-12-22 02:36:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:36:39,895 INFO L93 Difference]: Finished difference Result 168152 states and 186734 transitions. [2020-12-22 02:36:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:36:39,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 466 [2020-12-22 02:36:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:36:40,020 INFO L225 Difference]: With dead ends: 168152 [2020-12-22 02:36:40,020 INFO L226 Difference]: Without dead ends: 92573 [2020-12-22 02:36:40,072 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 02:36:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92573 states. [2020-12-22 02:36:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92573 to 86600. [2020-12-22 02:36:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86600 states. [2020-12-22 02:36:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86600 states to 86600 states and 94771 transitions. [2020-12-22 02:36:41,537 INFO L78 Accepts]: Start accepts. Automaton has 86600 states and 94771 transitions. Word has length 466 [2020-12-22 02:36:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:36:41,538 INFO L481 AbstractCegarLoop]: Abstraction has 86600 states and 94771 transitions. [2020-12-22 02:36:41,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:36:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 86600 states and 94771 transitions. [2020-12-22 02:36:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-12-22 02:36:41,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:36:41,551 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:36:41,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:36:41,552 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:36:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:36:41,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2011892916, now seen corresponding path program 1 times [2020-12-22 02:36:41,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:36:41,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822776055] [2020-12-22 02:36:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:36:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2020-12-22 02:36:42,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822776055] [2020-12-22 02:36:42,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:36:42,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:36:42,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529961371] [2020-12-22 02:36:42,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:36:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:36:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:36:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:36:42,268 INFO L87 Difference]: Start difference. First operand 86600 states and 94771 transitions. Second operand 3 states. [2020-12-22 02:36:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:36:48,038 INFO L93 Difference]: Finished difference Result 183825 states and 201447 transitions. [2020-12-22 02:36:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:36:48,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 521 [2020-12-22 02:36:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:36:48,399 INFO L225 Difference]: With dead ends: 183825 [2020-12-22 02:36:48,399 INFO L226 Difference]: Without dead ends: 96367 [2020-12-22 02:36:48,469 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 02:36:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96367 states. [2020-12-22 02:36:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96367 to 77187. [2020-12-22 02:36:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77187 states. [2020-12-22 02:36:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77187 states to 77187 states and 84322 transitions. [2020-12-22 02:36:49,837 INFO L78 Accepts]: Start accepts. Automaton has 77187 states and 84322 transitions. Word has length 521 [2020-12-22 02:36:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:36:49,838 INFO L481 AbstractCegarLoop]: Abstraction has 77187 states and 84322 transitions. [2020-12-22 02:36:49,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:36:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 77187 states and 84322 transitions. [2020-12-22 02:36:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-12-22 02:36:49,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:36:49,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:36:49,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:36:49,850 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:36:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:36:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1214094742, now seen corresponding path program 1 times [2020-12-22 02:36:49,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:36:49,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610350720] [2020-12-22 02:36:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:36:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 164 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 02:36:50,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610350720] [2020-12-22 02:36:50,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57340274] [2020-12-22 02:36:50,965 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 02:36:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:36:51,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:36:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:36:52,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:36:52,394 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:52,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 02:36:52,482 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:52,576 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:52,775 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:53,002 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:53,274 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:53,539 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:53,848 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:54,342 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:55,035 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:55,435 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:55,771 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:56,170 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:56,779 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:57,245 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:58,080 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:58,723 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:36:59,475 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:00,350 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:01,433 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:02,505 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:03,630 INFO L757 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:05,170 INFO L757 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:06,351 INFO L757 QuantifierPusher]: Run 230 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:07,741 INFO L757 QuantifierPusher]: Run 240 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:08,982 INFO L757 QuantifierPusher]: Run 250 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:10,190 INFO L757 QuantifierPusher]: Run 260 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:11,711 INFO L757 QuantifierPusher]: Run 270 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:13,136 INFO L757 QuantifierPusher]: Run 280 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:14,774 INFO L757 QuantifierPusher]: Run 290 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:16,728 INFO L757 QuantifierPusher]: Run 300 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:18,496 INFO L757 QuantifierPusher]: Run 310 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:20,366 INFO L757 QuantifierPusher]: Run 320 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:22,560 INFO L757 QuantifierPusher]: Run 330 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:24,848 INFO L757 QuantifierPusher]: Run 340 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:27,221 INFO L757 QuantifierPusher]: Run 350 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:29,801 INFO L757 QuantifierPusher]: Run 360 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:32,481 INFO L757 QuantifierPusher]: Run 370 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:35,516 INFO L757 QuantifierPusher]: Run 380 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:38,912 INFO L757 QuantifierPusher]: Run 390 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:42,202 INFO L757 QuantifierPusher]: Run 400 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:45,777 INFO L757 QuantifierPusher]: Run 410 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:49,750 INFO L757 QuantifierPusher]: Run 420 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:53,642 INFO L757 QuantifierPusher]: Run 430 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:37:57,725 INFO L757 QuantifierPusher]: Run 440 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:38:02,499 INFO L757 QuantifierPusher]: Run 450 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:38:06,951 INFO L757 QuantifierPusher]: Run 460 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:38:11,614 INFO L757 QuantifierPusher]: Run 470 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:38:16,654 INFO L757 QuantifierPusher]: Run 480 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:38:21,952 INFO L757 QuantifierPusher]: Run 490 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:38:27,069 INFO L757 QuantifierPusher]: Run 500 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:38:32,692 INFO L757 QuantifierPusher]: Run 510 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.