/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/array-examples/standard_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:29:28,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:29:28,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:29:28,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:29:28,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:29:28,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:29:28,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:29:28,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:29:28,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:29:28,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:29:28,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:29:28,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 21:29:29,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:29:29,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:29:29,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:29:29,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:29:29,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:29:29,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:29:29,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:29:29,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:29:29,124 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:29:29,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:29:29,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:29:29,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:29:29,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:29:29,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:29:29,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:29:29,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:29:29,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:29:29,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:29:29,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:29:29,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:29:29,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:29:29,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:29:29,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:29:29,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:29:29,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:29:29,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:29:29,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:29:29,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:29:29,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:29:29,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:29:29,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:29:29,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:29:29,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:29:29,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:29:29,588 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:29:29,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init1_ground-1.i [2020-12-21 21:29:29,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ecf924d/ccd1dfdd62ce4c069190c2c1390832d5/FLAG8844bb612 [2020-12-21 21:29:30,339 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:29:30,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init1_ground-1.i [2020-12-21 21:29:30,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ecf924d/ccd1dfdd62ce4c069190c2c1390832d5/FLAG8844bb612 [2020-12-21 21:29:30,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ecf924d/ccd1dfdd62ce4c069190c2c1390832d5 [2020-12-21 21:29:30,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:29:30,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:29:30,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:29:30,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:29:30,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:29:30,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:30,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c49ff04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30, skipping insertion in model container [2020-12-21 21:29:30,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:30,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:29:30,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:29:30,913 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/array-examples/standard_init1_ground-1.i[816,829] [2020-12-21 21:29:30,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:29:30,938 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:29:30,954 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/array-examples/standard_init1_ground-1.i[816,829] [2020-12-21 21:29:30,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:29:30,979 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:29:30,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30 WrapperNode [2020-12-21 21:29:30,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:29:30,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:30,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:29:30,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:29:30,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:31,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:29:31,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:29:31,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:29:31,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (1/1) ... [2020-12-21 21:29:31,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:29:31,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:29:31,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:29:31,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:29:31,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (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 [2020-12-21 21:29:31,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:29:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:29:31,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:29:31,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:29:31,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:29:31,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:29:31,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:29:31,579 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:29:31,579 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 21:29:31,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:31 BoogieIcfgContainer [2020-12-21 21:29:31,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:29:31,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:29:31,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:29:31,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:29:31,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:29:30" (1/3) ... [2020-12-21 21:29:31,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628ef081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:31, skipping insertion in model container [2020-12-21 21:29:31,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:30" (2/3) ... [2020-12-21 21:29:31,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628ef081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:31, skipping insertion in model container [2020-12-21 21:29:31,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:31" (3/3) ... [2020-12-21 21:29:31,610 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2020-12-21 21:29:31,624 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:29:31,631 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:29:31,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:29:31,712 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:29:31,712 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:29:31,712 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:29:31,713 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:29:31,713 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:29:31,713 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:29:31,713 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:29:31,713 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:29:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-21 21:29:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 21:29:31,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:31,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:31,735 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:31,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2020-12-21 21:29:31,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:31,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21019603] [2020-12-21 21:29:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:32,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21019603] [2020-12-21 21:29:32,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:29:32,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:29:32,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013777748] [2020-12-21 21:29:32,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:29:32,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:32,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:29:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:29:32,032 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-12-21 21:29:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:32,057 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2020-12-21 21:29:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:29:32,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-21 21:29:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:32,070 INFO L225 Difference]: With dead ends: 26 [2020-12-21 21:29:32,070 INFO L226 Difference]: Without dead ends: 11 [2020-12-21 21:29:32,074 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 [2020-12-21 21:29:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-21 21:29:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-21 21:29:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-21 21:29:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-21 21:29:32,114 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2020-12-21 21:29:32,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:32,114 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-21 21:29:32,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:29:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-21 21:29:32,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:29:32,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:32,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:32,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:29:32,116 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2020-12-21 21:29:32,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:32,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389879861] [2020-12-21 21:29:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389879861] [2020-12-21 21:29:32,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038408198] [2020-12-21 21:29:32,169 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 [2020-12-21 21:29:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:29:32,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:32,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:32,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:29:32,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988903553] [2020-12-21 21:29:32,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:29:32,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:29:32,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:32,334 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-12-21 21:29:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:32,358 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-21 21:29:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:29:32,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-21 21:29:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:32,360 INFO L225 Difference]: With dead ends: 19 [2020-12-21 21:29:32,361 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 21:29:32,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 21:29:32,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-21 21:29:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 21:29:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-21 21:29:32,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-21 21:29:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:32,372 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-21 21:29:32,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:29:32,373 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-21 21:29:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:29:32,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:32,375 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:32,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:29:32,591 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash 490447920, now seen corresponding path program 2 times [2020-12-21 21:29:32,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:32,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074964025] [2020-12-21 21:29:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:32,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074964025] [2020-12-21 21:29:32,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419858015] [2020-12-21 21:29:32,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 21:29:32,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:32,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:29:32,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:32,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:32,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:29:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777219832] [2020-12-21 21:29:32,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:29:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:29:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:29:32,784 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-21 21:29:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:32,808 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-21 21:29:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:29:32,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-21 21:29:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:32,811 INFO L225 Difference]: With dead ends: 20 [2020-12-21 21:29:32,811 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 21:29:32,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:29:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 21:29:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-21 21:29:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 21:29:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-21 21:29:32,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2020-12-21 21:29:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:32,824 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-21 21:29:32,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:29:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-21 21:29:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:29:32,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:32,825 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:33,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:33,042 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1924507733, now seen corresponding path program 3 times [2020-12-21 21:29:33,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:33,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494128146] [2020-12-21 21:29:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:33,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494128146] [2020-12-21 21:29:33,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329586288] [2020-12-21 21:29:33,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 21:29:33,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:29:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:29:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:33,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:33,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:29:33,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257903536] [2020-12-21 21:29:33,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:29:33,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:29:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:33,235 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-12-21 21:29:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:33,252 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-21 21:29:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:29:33,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-21 21:29:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:33,254 INFO L225 Difference]: With dead ends: 21 [2020-12-21 21:29:33,254 INFO L226 Difference]: Without dead ends: 14 [2020-12-21 21:29:33,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-21 21:29:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-21 21:29:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 21:29:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-21 21:29:33,259 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-21 21:29:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:33,260 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-21 21:29:33,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:29:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-21 21:29:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:29:33,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:33,261 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:33,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:33,476 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 4 times [2020-12-21 21:29:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:33,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004245095] [2020-12-21 21:29:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:33,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004245095] [2020-12-21 21:29:33,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399207877] [2020-12-21 21:29:33,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:33,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:29:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:33,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:33,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:29:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070830075] [2020-12-21 21:29:33,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:29:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:29:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:33,714 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-21 21:29:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:33,733 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-21 21:29:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:29:33,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-21 21:29:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:33,735 INFO L225 Difference]: With dead ends: 22 [2020-12-21 21:29:33,735 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 21:29:33,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 21:29:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-21 21:29:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:29:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-21 21:29:33,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-12-21 21:29:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:33,741 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-21 21:29:33,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:29:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-21 21:29:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:29:33,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:33,742 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:33,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:33,957 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash -968764341, now seen corresponding path program 5 times [2020-12-21 21:29:33,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:33,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499075722] [2020-12-21 21:29:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499075722] [2020-12-21 21:29:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985726623] [2020-12-21 21:29:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:34,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:29:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:29:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:34,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:34,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:29:34,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96529195] [2020-12-21 21:29:34,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:29:34,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:29:34,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:29:34,176 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2020-12-21 21:29:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:34,193 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-21 21:29:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:29:34,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-21 21:29:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:34,194 INFO L225 Difference]: With dead ends: 23 [2020-12-21 21:29:34,194 INFO L226 Difference]: Without dead ends: 16 [2020-12-21 21:29:34,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:29:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-21 21:29:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-21 21:29:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:29:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-21 21:29:34,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-12-21 21:29:34,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:34,199 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-21 21:29:34,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:29:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-21 21:29:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:29:34,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:34,200 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:34,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:29:34,415 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash 84552432, now seen corresponding path program 6 times [2020-12-21 21:29:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:34,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883106512] [2020-12-21 21:29:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883106512] [2020-12-21 21:29:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18301530] [2020-12-21 21:29:34,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:34,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:29:34,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:29:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:34,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:34,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:29:34,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281987493] [2020-12-21 21:29:34,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:29:34,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:29:34,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:29:34,614 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2020-12-21 21:29:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:34,633 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-21 21:29:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:29:34,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-21 21:29:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:34,634 INFO L225 Difference]: With dead ends: 24 [2020-12-21 21:29:34,634 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:29:34,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:29:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:29:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 21:29:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:29:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-21 21:29:34,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-21 21:29:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:34,639 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-21 21:29:34,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:29:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-21 21:29:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:29:34,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:34,640 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:34,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:34,856 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:34,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1622365973, now seen corresponding path program 7 times [2020-12-21 21:29:34,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:34,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450192625] [2020-12-21 21:29:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:35,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450192625] [2020-12-21 21:29:35,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837801053] [2020-12-21 21:29:35,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:35,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:29:35,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:35,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:35,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:29:35,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064492029] [2020-12-21 21:29:35,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:29:35,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:35,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:29:35,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:29:35,107 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2020-12-21 21:29:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:35,131 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-12-21 21:29:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:29:35,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-21 21:29:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:35,133 INFO L225 Difference]: With dead ends: 25 [2020-12-21 21:29:35,133 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 21:29:35,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:29:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 21:29:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-21 21:29:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 21:29:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-21 21:29:35,138 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-12-21 21:29:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:35,138 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-21 21:29:35,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:29:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-21 21:29:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:29:35,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:35,139 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:35,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:35,354 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:35,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1297738320, now seen corresponding path program 8 times [2020-12-21 21:29:35,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:35,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293649263] [2020-12-21 21:29:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:35,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293649263] [2020-12-21 21:29:35,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056898847] [2020-12-21 21:29:35,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:35,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:29:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:35,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:35,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:29:35,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303928033] [2020-12-21 21:29:35,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:29:35,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:29:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:29:35,588 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-12-21 21:29:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:35,608 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-21 21:29:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:29:35,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-21 21:29:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:35,610 INFO L225 Difference]: With dead ends: 26 [2020-12-21 21:29:35,610 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 21:29:35,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:29:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 21:29:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-21 21:29:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:29:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-21 21:29:35,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-12-21 21:29:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:35,615 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-21 21:29:35,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:29:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-21 21:29:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:29:35,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:35,616 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:35,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:29:35,831 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1626658187, now seen corresponding path program 9 times [2020-12-21 21:29:35,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:35,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143291179] [2020-12-21 21:29:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:35,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143291179] [2020-12-21 21:29:35,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155054791] [2020-12-21 21:29:35,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:36,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:29:36,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:29:36,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:36,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:36,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:29:36,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746961307] [2020-12-21 21:29:36,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:29:36,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:36,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:29:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:29:36,131 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2020-12-21 21:29:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:36,159 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-21 21:29:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:29:36,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-21 21:29:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:36,161 INFO L225 Difference]: With dead ends: 27 [2020-12-21 21:29:36,161 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:29:36,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:29:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:29:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-21 21:29:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 21:29:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-21 21:29:36,165 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-12-21 21:29:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:36,166 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-21 21:29:36,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:29:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-21 21:29:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:29:36,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:36,166 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:36,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:36,380 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 10 times [2020-12-21 21:29:36,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:36,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744573441] [2020-12-21 21:29:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:36,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744573441] [2020-12-21 21:29:36,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227814475] [2020-12-21 21:29:36,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:36,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:29:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:36,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:29:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270499808] [2020-12-21 21:29:36,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:29:36,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:29:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:29:36,666 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-12-21 21:29:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:36,695 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-21 21:29:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:29:36,696 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-21 21:29:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:36,697 INFO L225 Difference]: With dead ends: 28 [2020-12-21 21:29:36,697 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 21:29:36,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:29:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 21:29:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-21 21:29:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 21:29:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-21 21:29:36,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-12-21 21:29:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:36,705 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-21 21:29:36,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:29:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-21 21:29:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 21:29:36,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:36,706 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:36,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:36,920 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1497651755, now seen corresponding path program 11 times [2020-12-21 21:29:36,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:36,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80529365] [2020-12-21 21:29:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:37,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80529365] [2020-12-21 21:29:37,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068989661] [2020-12-21 21:29:37,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:37,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 21:29:37,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:37,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:29:37,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:37,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:37,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:29:37,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021338081] [2020-12-21 21:29:37,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:29:37,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:37,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:29:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:29:37,310 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 15 states. [2020-12-21 21:29:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:37,343 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-21 21:29:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:29:37,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-21 21:29:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:37,346 INFO L225 Difference]: With dead ends: 29 [2020-12-21 21:29:37,346 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:29:37,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:29:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:29:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-21 21:29:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 21:29:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-21 21:29:37,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-12-21 21:29:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:37,361 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-21 21:29:37,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:29:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-21 21:29:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:29:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:37,363 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:37,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:29:37,578 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash -765959920, now seen corresponding path program 12 times [2020-12-21 21:29:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:37,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309479918] [2020-12-21 21:29:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:37,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309479918] [2020-12-21 21:29:37,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998436766] [2020-12-21 21:29:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:37,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:29:37,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:37,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:29:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:37,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:37,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:29:37,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053611922] [2020-12-21 21:29:37,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:29:37,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:37,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:29:37,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:29:37,896 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2020-12-21 21:29:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:37,927 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-21 21:29:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:29:37,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-21 21:29:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:37,928 INFO L225 Difference]: With dead ends: 30 [2020-12-21 21:29:37,928 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:29:37,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:29:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:29:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:29:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:29:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-21 21:29:37,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-12-21 21:29:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:37,933 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-21 21:29:37,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:29:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-21 21:29:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:29:37,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:37,934 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:38,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:29:38,149 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2076522187, now seen corresponding path program 13 times [2020-12-21 21:29:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:38,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536644323] [2020-12-21 21:29:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:38,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536644323] [2020-12-21 21:29:38,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963496284] [2020-12-21 21:29:38,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:38,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:29:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:38,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:38,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:29:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664436844] [2020-12-21 21:29:38,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:29:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:29:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:29:38,481 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2020-12-21 21:29:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:38,522 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-21 21:29:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:29:38,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-21 21:29:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:38,527 INFO L225 Difference]: With dead ends: 31 [2020-12-21 21:29:38,527 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 21:29:38,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:29:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 21:29:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-21 21:29:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:29:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-21 21:29:38,535 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-12-21 21:29:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:38,535 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-21 21:29:38,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:29:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-21 21:29:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:29:38,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:38,537 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:38,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:29:38,751 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash -845712, now seen corresponding path program 14 times [2020-12-21 21:29:38,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:38,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866029010] [2020-12-21 21:29:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:38,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866029010] [2020-12-21 21:29:38,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710486166] [2020-12-21 21:29:38,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:38,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:38,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:29:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:39,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:39,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:29:39,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232152722] [2020-12-21 21:29:39,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:29:39,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:39,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:29:39,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:29:39,038 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2020-12-21 21:29:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:39,072 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-21 21:29:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:29:39,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-21 21:29:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:39,073 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:29:39,073 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 21:29:39,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:29:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 21:29:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-21 21:29:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 21:29:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-21 21:29:39,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2020-12-21 21:29:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:39,077 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-21 21:29:39,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:29:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-21 21:29:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 21:29:39,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:39,078 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:39,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:39,293 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash 25258859, now seen corresponding path program 15 times [2020-12-21 21:29:39,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:39,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312057657] [2020-12-21 21:29:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:39,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312057657] [2020-12-21 21:29:39,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609808211] [2020-12-21 21:29:39,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:39,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:29:39,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:29:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:39,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:39,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:29:39,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166022431] [2020-12-21 21:29:39,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:29:39,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:29:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:29:39,780 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 19 states. [2020-12-21 21:29:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:39,807 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-21 21:29:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:29:39,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-21 21:29:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:39,808 INFO L225 Difference]: With dead ends: 33 [2020-12-21 21:29:39,808 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:29:39,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:29:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:29:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:29:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:29:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-21 21:29:39,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-12-21 21:29:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:39,813 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-21 21:29:39,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:29:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-21 21:29:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:29:39,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:39,814 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:40,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:29:40,029 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:40,030 INFO L82 PathProgramCache]: Analyzing trace with hash 834500560, now seen corresponding path program 16 times [2020-12-21 21:29:40,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:40,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089022407] [2020-12-21 21:29:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:40,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089022407] [2020-12-21 21:29:40,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603293139] [2020-12-21 21:29:40,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:40,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:29:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:40,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:40,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:29:40,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685521087] [2020-12-21 21:29:40,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:29:40,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:40,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:29:40,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:29:40,420 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-21 21:29:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:40,453 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-21 21:29:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:29:40,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-21 21:29:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:40,456 INFO L225 Difference]: With dead ends: 34 [2020-12-21 21:29:40,456 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:29:40,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:29:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:29:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-21 21:29:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:29:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-21 21:29:40,467 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2020-12-21 21:29:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:40,467 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-21 21:29:40,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:29:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-21 21:29:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:29:40,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:40,471 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:40,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:29:40,686 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash 151189515, now seen corresponding path program 17 times [2020-12-21 21:29:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:40,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267855570] [2020-12-21 21:29:40,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:40,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267855570] [2020-12-21 21:29:40,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041795312] [2020-12-21 21:29:40,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:41,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-21 21:29:41,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:29:41,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:41,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:41,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:29:41,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35049030] [2020-12-21 21:29:41,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:29:41,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:29:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:29:41,197 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2020-12-21 21:29:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:41,233 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-21 21:29:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:29:41,234 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-21 21:29:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:41,234 INFO L225 Difference]: With dead ends: 35 [2020-12-21 21:29:41,234 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:29:41,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:29:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:29:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-21 21:29:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 21:29:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-21 21:29:41,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-12-21 21:29:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:41,239 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-21 21:29:41,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:29:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-21 21:29:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:29:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:41,240 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:41,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:29:41,455 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:41,456 INFO L82 PathProgramCache]: Analyzing trace with hash 443383600, now seen corresponding path program 18 times [2020-12-21 21:29:41,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:41,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084178635] [2020-12-21 21:29:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:41,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084178635] [2020-12-21 21:29:41,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237912129] [2020-12-21 21:29:41,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:42,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-21 21:29:42,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:29:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:42,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:29:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617847803] [2020-12-21 21:29:42,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:29:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:29:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:29:42,152 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2020-12-21 21:29:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:42,194 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-21 21:29:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:29:42,195 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-21 21:29:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:42,196 INFO L225 Difference]: With dead ends: 36 [2020-12-21 21:29:42,196 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 21:29:42,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:29:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 21:29:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-21 21:29:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:29:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-21 21:29:42,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2020-12-21 21:29:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:42,200 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-21 21:29:42,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:29:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-21 21:29:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:29:42,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:42,201 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:42,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:42,415 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:42,415 INFO L82 PathProgramCache]: Analyzing trace with hash 911465643, now seen corresponding path program 19 times [2020-12-21 21:29:42,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:42,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772479713] [2020-12-21 21:29:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:42,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772479713] [2020-12-21 21:29:42,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040987187] [2020-12-21 21:29:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:42,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:29:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:42,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:42,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:29:42,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245487355] [2020-12-21 21:29:42,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:29:42,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:42,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:29:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:29:42,855 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2020-12-21 21:29:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:42,886 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-21 21:29:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:29:42,886 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-21 21:29:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:42,887 INFO L225 Difference]: With dead ends: 37 [2020-12-21 21:29:42,887 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 21:29:42,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:29:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 21:29:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-21 21:29:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:29:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-21 21:29:42,892 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2020-12-21 21:29:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:42,892 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-21 21:29:42,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:29:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-21 21:29:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:29:42,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:42,893 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:43,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:43,108 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1757860208, now seen corresponding path program 20 times [2020-12-21 21:29:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:43,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722673655] [2020-12-21 21:29:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722673655] [2020-12-21 21:29:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819004320] [2020-12-21 21:29:43,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:43,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:43,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:43,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:29:43,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:43,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:43,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:29:43,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034087741] [2020-12-21 21:29:43,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:29:43,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:43,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:29:43,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:29:43,569 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2020-12-21 21:29:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:43,604 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-21 21:29:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:29:43,605 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-21 21:29:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:43,605 INFO L225 Difference]: With dead ends: 38 [2020-12-21 21:29:43,606 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 21:29:43,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:29:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 21:29:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-21 21:29:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:29:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-21 21:29:43,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-12-21 21:29:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:43,610 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-21 21:29:43,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:29:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-21 21:29:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:29:43,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:43,611 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:43,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:29:43,825 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1392384331, now seen corresponding path program 21 times [2020-12-21 21:29:43,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:43,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083572049] [2020-12-21 21:29:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:44,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083572049] [2020-12-21 21:29:44,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138838568] [2020-12-21 21:29:44,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:44,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 21:29:44,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:44,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:29:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:44,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:44,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:29:44,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914860473] [2020-12-21 21:29:44,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:29:44,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:44,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:29:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:29:44,683 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 25 states. [2020-12-21 21:29:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:44,719 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-21 21:29:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:29:44,720 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-12-21 21:29:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:44,721 INFO L225 Difference]: With dead ends: 39 [2020-12-21 21:29:44,721 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:29:44,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:29:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:29:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 21:29:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:29:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-21 21:29:44,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-12-21 21:29:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:44,725 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-21 21:29:44,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:29:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-21 21:29:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:29:44,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:44,726 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:44,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:29:44,941 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 22 times [2020-12-21 21:29:44,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:44,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065189271] [2020-12-21 21:29:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:45,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065189271] [2020-12-21 21:29:45,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110795753] [2020-12-21 21:29:45,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:45,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:45,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:29:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:45,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:45,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:29:45,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671496895] [2020-12-21 21:29:45,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:29:45,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:45,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:29:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:29:45,430 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2020-12-21 21:29:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:45,472 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-21 21:29:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:29:45,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-21 21:29:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:45,473 INFO L225 Difference]: With dead ends: 40 [2020-12-21 21:29:45,473 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 21:29:45,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:29:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 21:29:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-21 21:29:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:29:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-21 21:29:45,478 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2020-12-21 21:29:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:45,478 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-21 21:29:45,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:29:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-21 21:29:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:29:45,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:45,479 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:45,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:45,686 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:45,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash -301224469, now seen corresponding path program 23 times [2020-12-21 21:29:45,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:45,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865386536] [2020-12-21 21:29:45,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:46,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865386536] [2020-12-21 21:29:46,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128833639] [2020-12-21 21:29:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:46,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-21 21:29:46,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:46,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:29:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:46,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:46,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:29:46,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003393849] [2020-12-21 21:29:46,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:29:46,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:29:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:29:46,552 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 27 states. [2020-12-21 21:29:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:46,594 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-21 21:29:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:29:46,594 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-12-21 21:29:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:46,595 INFO L225 Difference]: With dead ends: 41 [2020-12-21 21:29:46,595 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 21:29:46,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:29:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 21:29:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-21 21:29:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:29:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-21 21:29:46,600 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2020-12-21 21:29:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:46,600 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-21 21:29:46,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:29:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-21 21:29:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:29:46,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:46,601 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:46,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:29:46,816 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash -696548016, now seen corresponding path program 24 times [2020-12-21 21:29:46,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:46,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078969394] [2020-12-21 21:29:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078969394] [2020-12-21 21:29:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146206637] [2020-12-21 21:29:47,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:49,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:29:49,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:49,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:29:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:49,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:49,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:29:49,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979508255] [2020-12-21 21:29:49,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:29:49,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:29:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:29:49,189 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2020-12-21 21:29:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:49,239 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-21 21:29:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:29:49,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-21 21:29:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:49,240 INFO L225 Difference]: With dead ends: 42 [2020-12-21 21:29:49,240 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:29:49,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:29:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:29:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-21 21:29:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:29:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-21 21:29:49,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-12-21 21:29:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:49,244 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-21 21:29:49,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:29:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-21 21:29:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:29:49,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:49,245 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:49,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:49,458 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:49,459 INFO L82 PathProgramCache]: Analyzing trace with hash -66676085, now seen corresponding path program 25 times [2020-12-21 21:29:49,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:49,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135766106] [2020-12-21 21:29:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:49,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135766106] [2020-12-21 21:29:49,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060852834] [2020-12-21 21:29:49,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:29:49,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:50,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:50,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:29:50,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796414415] [2020-12-21 21:29:50,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:29:50,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:29:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:29:50,039 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 29 states. [2020-12-21 21:29:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:50,082 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-21 21:29:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:29:50,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-12-21 21:29:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:50,084 INFO L225 Difference]: With dead ends: 43 [2020-12-21 21:29:50,084 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:29:50,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:29:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:29:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-21 21:29:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:29:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-21 21:29:50,088 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2020-12-21 21:29:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:50,088 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-21 21:29:50,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:29:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-21 21:29:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:29:50,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:50,089 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:50,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:29:50,304 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:50,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2015482704, now seen corresponding path program 26 times [2020-12-21 21:29:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:50,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445987505] [2020-12-21 21:29:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:50,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445987505] [2020-12-21 21:29:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955031111] [2020-12-21 21:29:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:50,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:50,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:50,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:29:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:50,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:50,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:29:50,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949677464] [2020-12-21 21:29:50,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:29:50,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:50,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:29:50,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:29:50,938 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2020-12-21 21:29:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:51,006 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-21 21:29:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:29:51,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-21 21:29:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:51,008 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:29:51,008 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:29:51,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:29:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:29:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-21 21:29:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:29:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-21 21:29:51,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2020-12-21 21:29:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:51,012 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-21 21:29:51,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:29:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-21 21:29:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:29:51,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:51,013 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:51,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:29:51,228 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1996021547, now seen corresponding path program 27 times [2020-12-21 21:29:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753660233] [2020-12-21 21:29:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753660233] [2020-12-21 21:29:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031637905] [2020-12-21 21:29:51,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:55,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 21:29:55,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 21:29:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:55,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:55,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-21 21:29:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833063870] [2020-12-21 21:29:55,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:29:55,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:29:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:29:55,348 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 31 states. [2020-12-21 21:29:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:55,410 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-21 21:29:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:29:55,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-12-21 21:29:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:55,411 INFO L225 Difference]: With dead ends: 45 [2020-12-21 21:29:55,411 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:29:55,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:29:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:29:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 21:29:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:29:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-21 21:29:55,423 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2020-12-21 21:29:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:55,423 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-21 21:29:55,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:29:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-21 21:29:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:29:55,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:55,424 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:55,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:29:55,638 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:55,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1798601744, now seen corresponding path program 28 times [2020-12-21 21:29:55,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:55,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485662518] [2020-12-21 21:29:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:56,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485662518] [2020-12-21 21:29:56,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946444659] [2020-12-21 21:29:56,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:56,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:56,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:29:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:56,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:56,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:29:56,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626891896] [2020-12-21 21:29:56,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:29:56,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:56,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:29:56,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:29:56,357 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2020-12-21 21:29:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:56,401 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-21 21:29:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:29:56,401 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-21 21:29:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:56,402 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:29:56,402 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 21:29:56,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:29:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 21:29:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-21 21:29:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:29:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-21 21:29:56,406 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2020-12-21 21:29:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:56,406 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-21 21:29:56,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:29:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-21 21:29:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:29:56,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:56,407 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:56,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:29:56,621 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash -26444853, now seen corresponding path program 29 times [2020-12-21 21:29:56,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:56,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123701400] [2020-12-21 21:29:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123701400] [2020-12-21 21:29:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262641298] [2020-12-21 21:29:57,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:58,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-21 21:29:58,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:29:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:58,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:58,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-21 21:29:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874026387] [2020-12-21 21:29:58,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:29:58,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:58,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:29:58,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:29:58,090 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 33 states. [2020-12-21 21:29:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:58,141 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-21 21:29:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:29:58,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-12-21 21:29:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:58,142 INFO L225 Difference]: With dead ends: 47 [2020-12-21 21:29:58,142 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:29:58,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:29:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:29:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-21 21:29:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:29:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-21 21:29:58,146 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-12-21 21:29:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:58,146 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-21 21:29:58,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:29:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-21 21:29:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:29:58,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:58,147 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:58,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:58,361 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash -768314512, now seen corresponding path program 30 times [2020-12-21 21:29:58,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:58,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668462570] [2020-12-21 21:29:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668462570] [2020-12-21 21:29:59,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746564120] [2020-12-21 21:29:59,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:06,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-21 21:30:06,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:30:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 21:30:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:06,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:06,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-21 21:30:06,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916927075] [2020-12-21 21:30:06,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:30:06,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:06,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:30:06,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:30:06,939 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2020-12-21 21:30:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:06,982 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-21 21:30:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:30:06,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-12-21 21:30:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:06,983 INFO L225 Difference]: With dead ends: 48 [2020-12-21 21:30:06,983 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 21:30:06,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:30:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 21:30:06,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-21 21:30:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:30:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-21 21:30:06,987 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2020-12-21 21:30:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:06,987 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-21 21:30:06,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:30:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-21 21:30:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:30:06,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:06,988 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:07,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:07,204 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2003529835, now seen corresponding path program 31 times [2020-12-21 21:30:07,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:07,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914885517] [2020-12-21 21:30:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:07,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914885517] [2020-12-21 21:30:07,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039420443] [2020-12-21 21:30:07,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:30:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:08,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:08,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:30:08,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350182452] [2020-12-21 21:30:08,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:30:08,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:30:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:30:08,061 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 35 states. [2020-12-21 21:30:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:08,118 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-21 21:30:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:30:08,118 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-12-21 21:30:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:08,119 INFO L225 Difference]: With dead ends: 49 [2020-12-21 21:30:08,119 INFO L226 Difference]: Without dead ends: 42 [2020-12-21 21:30:08,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:30:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-21 21:30:08,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-21 21:30:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:30:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-21 21:30:08,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2020-12-21 21:30:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:08,123 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-21 21:30:08,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:30:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-21 21:30:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:30:08,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:08,124 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:08,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:08,337 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:08,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2031358672, now seen corresponding path program 32 times [2020-12-21 21:30:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:08,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856030192] [2020-12-21 21:30:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:09,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856030192] [2020-12-21 21:30:09,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564064211] [2020-12-21 21:30:09,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:09,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:30:09,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:30:09,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:30:09,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:09,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:09,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:30:09,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027616321] [2020-12-21 21:30:09,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:30:09,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:30:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:30:09,230 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-12-21 21:30:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:09,286 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-21 21:30:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:30:09,287 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-21 21:30:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:09,287 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:30:09,287 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:30:09,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:30:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:30:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-21 21:30:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:30:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-12-21 21:30:09,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2020-12-21 21:30:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:09,296 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-12-21 21:30:09,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:30:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-12-21 21:30:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:30:09,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:09,297 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:09,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:30:09,512 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:09,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1400914677, now seen corresponding path program 33 times [2020-12-21 21:30:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:09,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759749968] [2020-12-21 21:30:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:10,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759749968] [2020-12-21 21:30:10,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505717049] [2020-12-21 21:30:10,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:17,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-21 21:30:17,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:30:17,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:30:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:17,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:17,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:30:17,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744378194] [2020-12-21 21:30:17,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:30:17,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:30:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:30:17,480 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 37 states. [2020-12-21 21:30:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:17,543 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-21 21:30:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:30:17,543 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-12-21 21:30:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:17,544 INFO L225 Difference]: With dead ends: 51 [2020-12-21 21:30:17,544 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:30:17,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:30:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:30:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:30:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:30:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-21 21:30:17,552 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2020-12-21 21:30:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:17,553 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-21 21:30:17,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:30:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-21 21:30:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:30:17,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:17,553 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:17,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:17,767 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash -427206096, now seen corresponding path program 34 times [2020-12-21 21:30:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:17,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920047180] [2020-12-21 21:30:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:18,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920047180] [2020-12-21 21:30:18,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436637727] [2020-12-21 21:30:18,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:18,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:30:18,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:30:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:30:18,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:18,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:18,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:30:18,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720769746] [2020-12-21 21:30:18,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:30:18,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:30:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:30:18,773 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2020-12-21 21:30:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:18,832 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-21 21:30:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:30:18,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-21 21:30:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:18,834 INFO L225 Difference]: With dead ends: 52 [2020-12-21 21:30:18,834 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 21:30:18,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:30:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 21:30:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-21 21:30:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 21:30:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-21 21:30:18,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2020-12-21 21:30:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:18,837 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-21 21:30:18,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:30:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-21 21:30:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 21:30:18,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:18,838 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:19,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:30:19,054 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:19,054 INFO L82 PathProgramCache]: Analyzing trace with hash -307011157, now seen corresponding path program 35 times [2020-12-21 21:30:19,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:19,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212071109] [2020-12-21 21:30:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:19,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212071109] [2020-12-21 21:30:19,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072131191] [2020-12-21 21:30:19,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:26,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-21 21:30:26,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:30:26,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:30:26,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:26,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:26,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:30:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035650035] [2020-12-21 21:30:26,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:30:26,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:26,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:30:26,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:30:26,423 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 39 states. [2020-12-21 21:30:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:26,492 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-21 21:30:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:30:26,493 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-12-21 21:30:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:26,493 INFO L225 Difference]: With dead ends: 53 [2020-12-21 21:30:26,493 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:30:26,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:30:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:30:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-21 21:30:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:30:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-21 21:30:26,500 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2020-12-21 21:30:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:26,500 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-21 21:30:26,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:30:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-21 21:30:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:30:26,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:26,502 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:26,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:26,717 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -875935344, now seen corresponding path program 36 times [2020-12-21 21:30:26,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:26,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032361077] [2020-12-21 21:30:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:27,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032361077] [2020-12-21 21:30:27,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979536688] [2020-12-21 21:30:27,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:55,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:30:55,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:30:55,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:30:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:56,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:56,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:30:56,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046210654] [2020-12-21 21:30:56,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:30:56,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:30:56,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:30:56,026 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2020-12-21 21:30:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:56,084 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-21 21:30:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:30:56,084 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-21 21:30:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:56,085 INFO L225 Difference]: With dead ends: 54 [2020-12-21 21:30:56,085 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:30:56,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:30:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:30:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-21 21:30:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:30:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-21 21:30:56,089 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2020-12-21 21:30:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:56,089 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-21 21:30:56,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:30:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-21 21:30:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 21:30:56,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:56,090 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:56,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:30:56,304 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1332715957, now seen corresponding path program 37 times [2020-12-21 21:30:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:56,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127814683] [2020-12-21 21:30:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:57,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127814683] [2020-12-21 21:30:57,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316860495] [2020-12-21 21:30:57,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:30:57,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:57,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:57,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:30:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390758056] [2020-12-21 21:30:57,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:30:57,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:30:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:30:57,403 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 41 states. [2020-12-21 21:30:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:57,468 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-21 21:30:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:30:57,469 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-12-21 21:30:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:57,469 INFO L225 Difference]: With dead ends: 55 [2020-12-21 21:30:57,469 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:30:57,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:30:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:30:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-21 21:30:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:30:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-21 21:30:57,473 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2020-12-21 21:30:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:57,473 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-21 21:30:57,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:30:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-21 21:30:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:30:57,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:57,474 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:57,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:30:57,689 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1686954224, now seen corresponding path program 38 times [2020-12-21 21:30:57,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:57,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684893608] [2020-12-21 21:30:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:30:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:58,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684893608] [2020-12-21 21:30:58,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435114003] [2020-12-21 21:30:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:30:58,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:30:58,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:30:58,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 21:30:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:30:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:30:58,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:30:58,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-21 21:30:58,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946741374] [2020-12-21 21:30:58,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 21:30:58,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:30:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 21:30:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:30:58,904 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2020-12-21 21:30:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:30:58,961 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-21 21:30:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 21:30:58,962 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-12-21 21:30:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:30:58,962 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:30:58,962 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:30:58,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:30:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:30:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-21 21:30:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:30:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-21 21:30:58,966 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2020-12-21 21:30:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:30:58,967 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-21 21:30:58,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 21:30:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-21 21:30:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:30:58,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:30:58,967 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:30:59,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:30:59,179 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:30:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:30:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash 807449323, now seen corresponding path program 39 times [2020-12-21 21:30:59,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:30:59,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139663844] [2020-12-21 21:30:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:30:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:31:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:31:00,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139663844] [2020-12-21 21:31:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421083367] [2020-12-21 21:31:00,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:32:23,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-21 21:32:23,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:32:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:32:23,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:32:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:32:23,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:32:23,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:32:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837490826] [2020-12-21 21:32:23,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:32:23,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:32:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:32:23,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:32:23,745 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 43 states. [2020-12-21 21:32:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:32:23,814 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-21 21:32:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:32:23,815 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-12-21 21:32:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:32:23,815 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:32:23,815 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:32:23,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:32:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:32:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-21 21:32:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:32:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-21 21:32:23,819 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-12-21 21:32:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:32:23,819 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-21 21:32:23,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:32:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-21 21:32:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:32:23,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:32:23,820 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:32:24,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:32:24,021 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:32:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:32:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash -687398832, now seen corresponding path program 40 times [2020-12-21 21:32:24,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:32:24,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023976164] [2020-12-21 21:32:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:32:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:32:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:32:25,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023976164] [2020-12-21 21:32:25,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905254060] [2020-12-21 21:32:25,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:32:25,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:32:25,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:32:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:32:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:32:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:32:25,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:32:25,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-21 21:32:25,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025508712] [2020-12-21 21:32:25,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:32:25,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:32:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:32:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:32:25,266 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2020-12-21 21:32:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:32:25,344 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-21 21:32:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:32:25,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-21 21:32:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:32:25,348 INFO L225 Difference]: With dead ends: 58 [2020-12-21 21:32:25,348 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:32:25,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:32:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:32:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-21 21:32:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:32:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-21 21:32:25,352 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2020-12-21 21:32:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:32:25,353 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-21 21:32:25,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:32:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-21 21:32:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:32:25,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:32:25,355 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:32:25,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:32:25,569 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:32:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:32:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash 216948619, now seen corresponding path program 41 times [2020-12-21 21:32:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:32:25,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645130098] [2020-12-21 21:32:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:32:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:32:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:32:26,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645130098] [2020-12-21 21:32:26,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408356005] [2020-12-21 21:32:26,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:32:42,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-21 21:32:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:32:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 21:32:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:32:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:32:42,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:32:42,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-21 21:32:42,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211279249] [2020-12-21 21:32:42,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:32:42,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:32:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:32:42,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:32:42,710 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 45 states. [2020-12-21 21:32:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:32:42,786 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-21 21:32:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:32:42,787 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-12-21 21:32:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:32:42,788 INFO L225 Difference]: With dead ends: 59 [2020-12-21 21:32:42,788 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:32:42,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:32:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:32:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-21 21:32:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:32:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-21 21:32:42,791 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2020-12-21 21:32:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:32:42,791 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-21 21:32:42,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:32:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-21 21:32:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:32:42,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:32:42,792 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:32:42,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-21 21:32:42,993 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:32:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:32:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1813051472, now seen corresponding path program 42 times [2020-12-21 21:32:42,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:32:42,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704632366] [2020-12-21 21:32:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:32:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:32:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:32:44,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704632366] [2020-12-21 21:32:44,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494255346] [2020-12-21 21:32:44,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:25,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-21 21:33:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-21 21:33:25,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:25,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:25,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-21 21:33:25,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766070649] [2020-12-21 21:33:25,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:33:25,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:33:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:33:25,472 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2020-12-21 21:33:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:25,549 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-21 21:33:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:33:25,549 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2020-12-21 21:33:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:25,550 INFO L225 Difference]: With dead ends: 60 [2020-12-21 21:33:25,550 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 21:33:25,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:33:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 21:33:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-21 21:33:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:33:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-12-21 21:33:25,553 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2020-12-21 21:33:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:25,554 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-12-21 21:33:25,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:33:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-12-21 21:33:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:33:25,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:25,555 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:25,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:25,768 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:25,768 INFO L82 PathProgramCache]: Analyzing trace with hash -318544853, now seen corresponding path program 43 times [2020-12-21 21:33:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:25,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481385765] [2020-12-21 21:33:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:27,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481385765] [2020-12-21 21:33:27,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567951852] [2020-12-21 21:33:27,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 21:33:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:27,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:27,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-21 21:33:27,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145874727] [2020-12-21 21:33:27,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:33:27,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:33:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:33:27,211 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 47 states. [2020-12-21 21:33:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:27,304 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-21 21:33:27,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:33:27,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2020-12-21 21:33:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:27,306 INFO L225 Difference]: With dead ends: 61 [2020-12-21 21:33:27,306 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 21:33:27,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:33:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 21:33:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-21 21:33:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:33:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-21 21:33:27,310 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2020-12-21 21:33:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:27,310 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-21 21:33:27,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:33:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-21 21:33:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:33:27,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:27,311 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:27,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:27,525 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1233479920, now seen corresponding path program 44 times [2020-12-21 21:33:27,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:27,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861056156] [2020-12-21 21:33:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861056156] [2020-12-21 21:33:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654206497] [2020-12-21 21:33:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:28,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:28,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 21:33:28,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:29,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:29,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-21 21:33:29,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740632357] [2020-12-21 21:33:29,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:33:29,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:33:29,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:33:29,005 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2020-12-21 21:33:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:29,098 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-21 21:33:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 21:33:29,099 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-21 21:33:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:29,100 INFO L225 Difference]: With dead ends: 62 [2020-12-21 21:33:29,100 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 21:33:29,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:33:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 21:33:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-21 21:33:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 21:33:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-12-21 21:33:29,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2020-12-21 21:33:29,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:29,103 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-12-21 21:33:29,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:33:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-12-21 21:33:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 21:33:29,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:29,103 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:29,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:33:29,304 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash 468304075, now seen corresponding path program 45 times [2020-12-21 21:33:29,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:29,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940688945] [2020-12-21 21:33:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:33:30,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940688945] [2020-12-21 21:33:30,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110915787] [2020-12-21 21:33:30,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true